JP2872868B2 - Coffee mill - Google Patents
Coffee millInfo
- Publication number
- JP2872868B2 JP2872868B2 JP28834392A JP28834392A JP2872868B2 JP 2872868 B2 JP2872868 B2 JP 2872868B2 JP 28834392 A JP28834392 A JP 28834392A JP 28834392 A JP28834392 A JP 28834392A JP 2872868 B2 JP2872868 B2 JP 2872868B2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- amount
- output
- change
- calculating
- 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
Links
Landscapes
- Apparatus For Making Beverages (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コーヒー豆を粉砕する
粉砕体を回転駆動するモータを備えてなるコーヒーミル
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coffee mill provided with a motor for rotating a pulverized body for pulverizing coffee beans.
【０００２】[0002]
【従来の技術】この種のコーヒーミルである例えばコー
ヒーメーカーに適用されたものにおいては、モータを駆
動する時間つまりミル時間を適宜設定するタイマを設
け、使用者がコーヒー豆の量に関係なく予め設定された
所定の時間モータを駆動してミルを行うようにしてい
る。上記のものの場合、ミルし過ぎたり、逆にミル不足
となったりするおそれがあり、コーヒーの味に悪影響を
与える欠点があった。このような欠点を解消するため
に、コーヒー豆の量に応じてモータを最適な時間だけ駆
動した後停止するように、モータに流れる電流がコーヒ
ー豆の量に応じて変化することに着目し、該電流を検出
してモータを停止するように制御するものが考えられて
いる。2. Description of the Related Art In a coffee mill of this type, for example, applied to a coffee maker, a timer for appropriately setting a time for driving a motor, that is, a mill time, is provided, and a user can set a timer in advance regardless of the amount of coffee beans. The mill is driven by driving the motor for a set predetermined time. In the case of the above, there is a possibility that the mill is excessively milled or, conversely, the mill is insufficient, which has a disadvantage that the taste of coffee is adversely affected. In order to eliminate such drawbacks, focusing on the fact that the current flowing through the motor changes according to the amount of coffee beans, so that the motor stops after driving the motor for an optimal time according to the amount of coffee beans, A device that detects the current and controls the motor to stop is considered.
【０００３】上記構成のものは、モータに流れる電流を
検出し、その検出出力が設定値以下になったことを判断
した後、更に決められた一定時間駆動してから、モータ
を停止するようにしている。このものの場合、検出出力
を判断した後更に一定時間モータを駆動するので、コー
ヒー豆の量に応じてミル時間をきめ細かく制御すること
ができないという問題があり、又、モータに流れる電流
の変化は起動時を除いてコーヒー豆の量に対してあまり
大きな差が生じるものではないため、上記検出出力が設
定値以下になることで判断しても、正確な判断即ち最適
な制御をしているとは言えなかった。[0003] In the above-mentioned configuration, after detecting the current flowing through the motor, judging that the detected output has become equal to or less than a set value, the motor is driven for a predetermined period of time, and then the motor is stopped. ing. In this case, since the motor is driven for a certain period of time after determining the detection output, there is a problem that the milling time cannot be finely controlled according to the amount of coffee beans, and the change in the current flowing through the motor is activated. Since there is no significant difference in the amount of coffee beans except for the time, even if it is determined that the detection output is equal to or less than the set value, it is not accurately determined, that is, optimal control is performed. I could not say it.
【０００４】そこで、コーヒー豆の量に応じた最適時間
でモータを駆動することができるコーヒーミルが発明さ
れ特開平２−１４７０３５号に開示されている。そのコ
ーヒーミルは、モータに流れる電流を検出する電流検出
手段からの検出出力に反比例するパルス幅のパルスを所
定時間毎に出力するパルス変換手段と、このパルス変換
手段からのパルスを積分する積分手段とを備え、この積
分手段からの積分出力と予め設定された基準値とを比較
してコーヒー豆のミル終了を検知し前記モータの停止制
御を行うものである。Accordingly, a coffee mill capable of driving a motor at an optimum time according to the amount of coffee beans has been invented and disclosed in Japanese Patent Application Laid-Open No. 2-147035. The coffee mill includes a pulse conversion unit that outputs a pulse having a pulse width that is inversely proportional to a detection output from a current detection unit that detects a current flowing through a motor every predetermined time, and an integration unit that integrates a pulse from the pulse conversion unit. And comparing the integrated output from the integrating means with a preset reference value to detect the end of the milling of the coffee beans and perform the stop control of the motor.
【０００５】又、モータのロックを検知してモータの焼
損を未然に防ぐ発明が特開平３−１９３０１２号に開示
されている。この発明に於けるモータのロック検知はモ
ータに流れる電流を検出し整流した電流値を基準電流値
と比較して、モータに流れる電流値が基準電流値以上で
あればロック状態であると判断してモータのロック検知
をおこなっている。Japanese Patent Application Laid-Open No. 3-193012 discloses an invention in which lock of a motor is detected to prevent burnout of the motor. In the lock detection of the motor according to the present invention, the current flowing through the motor is detected and the rectified current value is compared with a reference current value. If the current value flowing through the motor is equal to or more than the reference current value, it is determined that the motor is in a locked state. To detect motor lock.
【０００６】[0006]
【発明が解決しようとする課題】上記従来技術のコーヒ
ーミルは、コーヒー豆のミル終了検知，ミルモータのロ
ック検知および無負荷検知を、モータに流れる電流値と
基準値とを比較することにより行っているが、豆の種類
や豆の硬さ，電源電圧等のバラツキがあるため所定の基
準値と比較する制御では誤検知の虞れがあった。In the above-mentioned conventional coffee mill, the detection of the end of the coffee beans, the detection of the lock of the mill motor, and the detection of the no-load are performed by comparing a current value flowing through the motor with a reference value. However, since there are variations in the type of beans, the hardness of the beans, the power supply voltage, and the like, there is a risk of erroneous detection in control comparing with a predetermined reference value.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に本発明のコーヒーミルは、コーヒー豆を粉砕する粉砕
体を回転駆動するモータと、このモータに流れる電流を
検出する電流検出手段と、この電流検出手段からの検出
出力を所定時間毎に記憶する記憶手段と、この記憶手段
に記憶した前回の検出出力と今回の検出出力との変化量
を演算する演算手段と、この演算手段にて演算した前記
モータの起動突入期間経過後に於ける変化量と第２の所
定量とを比較する第２の比較手段と、コーヒー豆が略粉
砕してモータ電流が減少してゆく過程での変化量が第２
の所定量以上であるとの出力が前記第２の比較手段から
所定回数連続して出されたことを検出する計数手段と、
この計数手段の出力に基づいてコーヒー豆が略粉砕した
との判定を行い前記モータの停止制御を行う制御手段と
を具備する。In order to solve the above-mentioned problems, a coffee mill according to the present invention comprises a motor for rotationally driving a pulverized body for pulverizing coffee beans, current detecting means for detecting a current flowing through the motor, Storage means for storing the detection output from the current detection means at predetermined time intervals; calculation means for calculating the amount of change between the previous detection output and the current detection output stored in the storage means; A second comparing means for comparing the calculated change amount after the start-up period of the motor with a second predetermined amount, and a change amount in a process in which the coffee current is reduced by substantially grinding the coffee beans. Is the second
Counting means for detecting that the output of being equal to or more than a predetermined amount is continuously output from the second comparing means for a predetermined number of times;
The coffee beans are almost ground based on the output of this counting means .
And control means for performing stop control of the motor.
【０００８】前記計数手段とは実施例にて開示するカウ
ンターに限定されるものではなく、（前記所定時間×前
記所定回数）の時間を計時する計時手段をも含む。
又、電流検出手段も実施例に開示のものに限定されず、
前記特開平２−１４７０３５号，特開平３−１９３０１
２号にて開示されたカレントトランスを用いるものであ
っても良いこと勿論である。The counting means is not limited to the counter disclosed in the embodiment, but also includes a time counting means for counting a time of (the predetermined time × the predetermined number of times).
Also, the current detection means is not limited to those disclosed in the embodiments,
Japanese Unexamined Patent Publication Nos. 2-147035 and 3-19301
Needless to say, a current transformer disclosed in No. 2 may be used.
【０００９】上記コーヒーミルを発展させたものとし
て、コーヒー豆を粉砕する粉砕体を回転駆動するモータ
と、このモータに流れる電流を検出する電流検出手段
と、この電流検出手段からの検出出力を所定時間毎に記
憶する記憶手段と、この記憶手段に記憶した前回の検出
出力と今回の検出出力との変化量を演算する演算手段
と、この演算手段にて演算した前記モータの起動突入期
間経過後に於ける変化量と第２の所定量とを比較する第
２の比較手段と、コーヒー豆が略粉砕してモータ電流が
減少してゆく過程での変化量が第２の所定量以上である
との出力が前記第２の比較手段から所定回数連続して出
されたことを検出する計数手段と、この計数手段の出力
に基づいて作動し所定時間に於ける検出出力の最大値と
最小値を保持する保持手段と、その最大値と最小値との
差を演算し、その差が所定値以下であるならばミル終了
として前記モータを停止させる停止制御手段とを具備コ
ーヒーまた、本考案の請求項２記載のコーヒー沸し器
は、前記流水路と帰湯路との間であって、前記湯溜タン
ク底部との間に隙間を開けて前記本体カバーより垂下す
る壁を設け、該壁の流水路側および帰湯路側に前記蒸気
排出口を設けたことを特徴とするものである。As a development of the coffee mill, a motor for rotating a pulverized body for pulverizing coffee beans, current detecting means for detecting a current flowing through the motor, and a detection output from the current detecting means are provided in a predetermined manner. Storage means for storing for each time; calculating means for calculating the amount of change between the previous detection output and current detection output stored in the storage means; and after the elapse of the motor inrush period calculated by the calculation means. A second comparing means for comparing the amount of change at the second predetermined amount with a second predetermined amount, when the amount of change during the process of substantially grinding the coffee beans and decreasing the motor current is equal to or more than the second predetermined amount. Counting means for detecting that the output of the second comparing means has been output a predetermined number of times in succession, and operating based on the output of the counting means to determine the maximum value and the minimum value of the detection output in a predetermined time. Holding hands holding If, by calculating the difference between the maximum value and the minimum value, the mill ends if the difference is less than a predetermined value
And stop control means for stopping said motor comprises coffee As coffee boiling and instrument according to claim 2 of the present invention is arranged between the said flow of water passage and Kiyuro, said hot water reservoir tank bottom a wall with a gap hanging from the body cover provided between and is characterized in that a said vapor outlet in flow water path side and Kiyu roadside of the wall.
【００１０】上記本発明のコーヒーミルを流用して無負
荷時のモータ停止制御を行うものとして、コーヒー豆を
粉砕する粉砕体を回転駆動するモータと、このモータに
流れる電流を検出する電流検出手段と、この電流検出手
段からの検出出力を所定時間毎に記憶する記憶手段と、
この記憶手段に記憶した前回の検出出力と今回の検出出
力との変化量を演算する演算手段と、この演算手段にて
演算した前記モータの起動突入期間経過後に於ける変化
量と第２の所定量とを比較する第２の比較手段と、変化
量が第２の所定量以下であるとの前記第２の比較手段の
出力に基づいて作動し所定時間に於ける検出出力の最大
値と最小値を保持する保持手段と、その最大値と最小値
との差を演算し、その差が所定値以下であるならば無負
荷運転として前記モータを停止させる停止制御手段とを
具備する。A motor for rotating a pulverized body for pulverizing coffee beans, and a current detecting means for detecting a current flowing through the motor, wherein the coffee mill of the present invention is diverted to perform motor stop control under no load. Storage means for storing a detection output from the current detection means at predetermined time intervals;
Calculating means for calculating the amount of change between the previous detection output and the current detection output stored in the storage means; and calculating the amount of change after the elapse of the motor inrush period calculated by the calculating means, and A second comparing means for comparing the amount of change with a fixed amount, and a maximum value and a minimum value of a detection output at a predetermined time which are operated based on the output of the second comparing means that the amount of change is equal to or less than a second predetermined amount. Holding means for holding a value, and calculating a difference between the maximum value and the minimum value, and if the difference is equal to or less than a predetermined value, no negative
Stop control means for stopping the motor as a load operation .
【００１１】更に上記発明のコーヒーミルを流用してモ
ータロック時のモータ停止制御を行うものとして、コー
ヒー豆を粉砕する粉砕体を回転駆動するモータと、この
モータに流れる電流を検出する電流検出手段と、この電
流検出手段からの検出出力を所定時間毎に記憶する記憶
手段と、この記憶手段に記憶した前回の検出出力と今回
の検出出力との変化量を演算する演算手段と、この演算
手段にて演算した変化量と第１の所定量とを比較する第
１の比較手段と、変化量が前記第１の所定量以上であっ
て今回の検出出力が所定出力以上ならばモータロックと
して前記モータの停止制御を行う制御手段とを具備す
る。[0011] Further, a motor for rotating a pulverized body for pulverizing coffee beans and a current detecting means for detecting a current flowing through the motor are provided. Storage means for storing the detection output from the current detection means at predetermined time intervals; calculation means for calculating the amount of change between the previous detection output and the current detection output stored in the storage means; A first comparing means for comparing the amount of change calculated in the above with the first predetermined amount; and a motor lock if the amount of change is equal to or more than the first predetermined amount and the current detection output is equal to or more than the predetermined output.
And control means for performing stop control of the motor.
【００１２】[0012]
【作用】モータに流れる電流の変化は起動時を除いてコ
ーヒー豆の量に対してはあまり大きな差が生じるもので
はなくて、コーヒー豆のミル度合によって同一傾向の変
化が生じるという事情に基づいて、起動突入期間経過後
のモータに流れる所定時間あたりの電流変化量を検出
し、コーヒー豆が略粉砕してモータ電流が減少してゆく
過程での変化量が第２の所定量以上である状態が所定時
間続いたときコーヒー豆が略粉砕したとの判定を行い、
この判定後に一定時間モータを駆動してモータを停止さ
せたり、所定時間あたりのモータ電流最大値と最小値と
の差が所定値以下であるならばミル終了としてモータを
停止させる。The change in the current flowing through the motor does not cause a very large difference in the amount of coffee beans except at the time of starting, and the change in the same tendency occurs depending on the degree of milling of the coffee beans. A state in which the amount of change in current flowing through the motor per predetermined time after the elapse of the startup rush period is detected, and the amount of change in the process in which coffee beans are substantially crushed and the motor current decreases is equal to or greater than a second predetermined amount. Is determined that the coffee beans have been substantially crushed when has continued for a predetermined time,
After this determination, the motor is driven for a certain period of time to stop the motor, or if the difference between the maximum value and the minimum value of the motor current per predetermined time is equal to or less than a predetermined value, the mill is terminated and the motor is stopped.
【００１３】又、上記電流変化量が第２の所定量以下で
且つ所定時間あたりのモータ電流最大値と最小値との差
が所定値以下であるならば無負荷運転としてモータを停
止させる。If the amount of the current change is equal to or less than the second predetermined amount and the difference between the maximum value and the minimum value of the motor current per predetermined time is equal to or less than the predetermined value, the motor is stopped as a no-load operation.
【００１４】更に、モータ通電後のモータに流れる所定
時間あたりの電流変化量が第１の所定量以上且つモータ
電流の検出出力が所定出力以上であるならばモータロッ
クとしてモータを停止させる。 即ち、本発明による状
態検知はモータに流れる所定時間あたりの電流変化（相
対的変化）に基づいて行われるので、豆の種類や硬さあ
るいは電源電圧の変動等による誤検知の虞れがない。Further, if the amount of change in the current flowing through the motor per predetermined time after the motor is energized is equal to or more than the first predetermined amount and the detected output of the motor current is equal to or more than the predetermined output, the motor is stopped as a motor lock. That is, since the state detection according to the present invention is performed based on a change in current (relative change) per predetermined time flowing through the motor, there is no possibility of erroneous detection due to a change in the type or hardness of the beans or the power supply voltage.
【００１５】[0015]
【実施例】以下、本発明の一実施例を添付図面を参照し
ながら説明する。まず図１は本発明のコーヒーミルに採
用された電気回路の一実施例であり、１はコーヒー豆を
粉砕する粉砕体を回転駆動する直流モータ、２と３はモ
ータ１の直流電源を構成するダイオードブリッジと電解
コンデンサ、４はダイオードブリッジ２への通電制御を
行うためのトライアック、５はモータ１に流れる電流を
検出するための抵抗、６，７，８はモータ１に流れる電
流によって抵抗１の両端に発生する降下電圧を整流し分
割する抵抗，ダイオード，抵抗、９は平滑コンデンサ、
１０はコーヒーミル全体の制御を司るマイコンであり、
動作電源端子兼用のＶREf（ＶD）端子とＩＮ端子とに平
滑コンデンサ９の両端子が、ＯＵＴ端子にトライアック
４のゲート端子が接続されている。そして、上記抵抗
５，抵抗６，ダイオード７，抵抗８，平滑コンデンサ９
にて本発明に係る電流検出手段１１を構成している。An embodiment of the present invention will be described below with reference to the accompanying drawings. First, FIG. 1 shows an embodiment of an electric circuit employed in a coffee mill of the present invention. Reference numeral 1 denotes a DC motor for rotationally driving a pulverized body for pulverizing coffee beans. A diode bridge and an electrolytic capacitor, 4 is a triac for controlling energization of the diode bridge 2, 5 is a resistor for detecting a current flowing through the motor 1, 6, 7, and 8 are resistors of the resistor 1 based on a current flowing through the motor 1. A resistor, a diode, and a resistor for rectifying and dividing the voltage drop generated at both ends, 9 is a smoothing capacitor,
Reference numeral 10 denotes a microcomputer that controls the entire coffee mill,
Both terminals of the smoothing capacitor 9 are connected to a V REf (V D ) terminal also serving as an operation power supply terminal and an IN terminal, and a gate terminal of the triac 4 is connected to an OUT terminal. Then, the resistor 5, resistor 6, diode 7, resistor 8, smoothing capacitor 9
Constitutes the current detecting means 11 according to the present invention.
【００１６】上記マイコン１０は図２のブロック構成図
に示す如く、所定時間（例えば１秒）毎にＩＮ端子に入
力される電圧を前回と今回の２回分記憶する検出電圧記
憶手段１２と、該記憶手段１２に記憶された今回の電圧
値から前回の電圧値を減算して変化量を求める演算手段
１３と、該演算手段１３で求めた変化量をＲＯＭに記憶
された第１，第２の所定量と比較する第１，第２の比較
手段１４，１５と、変化量が増加か減少かを判別する判
別手段１６と、所定量以上の増加変化が連続した回数を
計数する計数手段１７と、該計数手段１７の出力を受け
て所定時間（例えば５秒間）に於ける最大電圧値ＶMAX
と最小電圧値ＶMINを記憶保持する保持手段１８と、最
大電圧値ＶMAXから最小電圧値ＶMINを減算する演算手段
１３と、減算値（差）をＲＯＭに記憶された所定値と比
較する第３の比較手段１９と、減算値が所定値以下であ
るとの第３の比較手段１９の出力に基づいてモータ１を
停止させる信号をトライアック４に出力する制御手段２
０とを内蔵している。又、モータ１のロック状態を検知
するために今回の検出電圧を所定電圧ＶLと比較する第
４の比較手段２１と、モータ１への通電時間を計時する
計時手段２２等を内蔵している。As shown in the block diagram of FIG. 2, the microcomputer 10 includes a detection voltage storage means 12 for storing the voltage input to the IN terminal at predetermined time intervals (for example, one second) for two times, the previous time and the current time. A calculating means 13 for subtracting the previous voltage value from the current voltage value stored in the storing means 12 to obtain a change amount; and a first and second storing means for storing the change amount obtained by the calculating means 13 in the ROM. First and second comparing means 14 and 15 for comparing with a predetermined amount, determining means 16 for determining whether the amount of change is increasing or decreasing, and counting means 17 for counting the number of times the increasing change of a predetermined amount or more continues. Receiving the output of the counting means 17, the maximum voltage value V MAX for a predetermined time (for example, 5 seconds).
Compared with the holding means 18 for storing and holding the minimum voltage value V MIN, the calculating means 13 for subtracting the minimum voltage value V MIN from the maximum voltage value V MAX, the predetermined value stored subtracted value (difference) in the ROM A third comparing means 19, and a control means 2 for outputting a signal for stopping the motor 1 to the triac 4 based on an output of the third comparing means 19 that the subtraction value is equal to or less than a predetermined value.
0 is built in. Further, a fourth comparing means 21 for comparing the detected voltage this time with a predetermined voltage VL to detect the locked state of the motor 1 and a time measuring means 22 for measuring the energizing time to the motor 1 are incorporated. .
【００１７】次に、本発明によるモータの停止制御を図
１，図２及び図３のフローチャート，図４に示す検出電
圧の経時変化図に基づいて説明する。マイコン１０のＯ
ＵＴ端子からモータＯＮの信号が出力されると同時に計
時手段２１がスタートし（Ｓ１）、所定時間毎に電流検
出手段１１の検出出力である電圧値ＶｎをＩＮ端子から
読み込み記憶手段１２に順次記憶する（Ｓ２）。そして
演算手段１３にて前回記憶した電圧値Ｖｎ-1に対する変
化量（Ｖｎ−Ｖｎ-1）を演算する（Ｓ３）。Next, the stop control of the motor according to the present invention will be described with reference to the flowcharts of FIGS. 1, 2 and 3 and the change over time of the detected voltage shown in FIG. O of microcomputer 10
At the same time that the motor ON signal is output from the UT terminal, the time counting means 21 starts (S1), and the voltage value Vn, which is the detection output of the current detection means 11, is read from the IN terminal at predetermined time intervals and sequentially stored in the storage means 12. (S2). And calculating a change amount (Vn-Vn -1) with respect to the voltage value Vn -1 was previously stored by the computing means 13 (S3).
【００１８】そして、演算した変化量が第１の所定量
（予め実験により求めてＲＯＭに記憶させてあるところ
のモータロック検出用変化量）以下であるかどうかを第
１の比較手段１４で比較する（Ｓ４）。変化量が第１の
所定量以下であればモータ起動の突入期間Ｔ1（数秒
間）が経過する迄、ステップ（Ｓ２）〜（Ｓ４）のルー
チンプログラムを繰り返し実行する。即ち、このモータ
起動突入期間Ｔ1（数秒間）に於ける検出電圧の変化は
一旦下降して上昇するので後述のモータロック検知以外
の検知には利用しないようにしている。Then, the first comparing means 14 compares whether the calculated change amount is equal to or less than a first predetermined amount (a change amount for motor lock detection which is obtained in advance by experiment and stored in the ROM). (S4). If the amount of change is equal to or less than the first predetermined amount inrush period T 1 (several seconds) of the motor start up has elapsed, repeatedly executes a routine program of the step (S2) ~ (S4). That is, since the change in the detection voltage during the motor start entry period T 1 (several seconds) temporarily drops and rises, it is not used for detection other than the motor lock detection described later.
【００１９】もし、前記第１の比較手段１４にて変化量
が第１の所定量を越えていれば電圧値Ｖｎが所定電圧Ｖ
L（予め実験により求めてＲＯＭに記憶させてあるとこ
ろのモータロック検出用電圧値）以下かどうかを第４の
比較手段２１で比較し（Ｓ５）、図４（ｂ）に示す如く
所定電圧ＶL以下であれば豆詰まり等によるロック状態
であると判断して制御手段２０からトライアック４にＯ
ＦＦ信号を出力してモータを停止させる（Ｓ６）と同時
に使用者にロック状態である旨の報知を表示手段（図示
省略）にて行う。所定電圧ＶL以上であれば正常時のル
ーチンプログラムに戻る。If the change amount exceeds the first predetermined amount by the first comparing means 14, the voltage value Vn becomes the predetermined voltage V
L (motor lock detection voltage value previously obtained by experiment and stored in ROM) is compared by a fourth comparing means 21 (S5), and as shown in FIG. If it is less than L , it is determined that the lock state is due to bean jam or the like, and the control unit 20 sends an O to the triac 4.
At the same time as outputting the FF signal to stop the motor (S6), the user is informed of the locked state by a display means (not shown). If the voltage is equal to or higher than the predetermined voltage V L , the process returns to the normal routine program.
【００２０】次に、モータ起動突入期間Ｔ1が経過した
かどうかを判定し（Ｓ７）、突入期間Ｔ1が経過すると
前記変化量が第２の所定量（予め実験により求めてＲＯ
Ｍに記憶させてあるところのミル終了検知用変化量）以
上かどうかを第２の比較手段１５で比較する（Ｓ８）。
変化量が第２の所定量以上であれば変化が増加か減少か
を判別手段１６にて判別し（Ｓ９）、増加であれば計数
手段１７をカウントをアップし（Ｓ１０）、カウント値
が所定回数（予め実験により求めてＲＯＭに記憶させて
あるところの、豆の量に拘らずミル終了前に現れる直線
的増加継続時間Ｔ2を測定するための基準回数）に達す
ると（Ｓ１１）、コーヒー豆が略粉砕した状態であるこ
との検知がなされる。この検知は相対的変化に基づいて
行われるので、豆の種類や硬さ及び電源電圧の変動等に
拘らず適確にミル終了直前の検知が行われる。[0020] Next, it is determined whether the motor start inrush period T 1 is elapsed (S7), the amount of change and inrush period T 1 is passed is determined by the second predetermined amount (advance experimentally RO
The second comparing means 15 compares whether or not it is equal to or more than the mill end detection change amount stored in M (S8).
If the amount of change is equal to or greater than the second predetermined amount, the determining means 16 determines whether the change increases or decreases (S9). If the change increases, the counting means 17 increments the count (S10), and number to reach (previously experimentation by where which had been stored in the ROM seeking, reference number for measuring linear increase duration T 2 appearing before regardless mill ends on the amount of beans) (S11), coffee It is detected that the beans are in a substantially crushed state. Since this detection is performed based on the relative change, the detection immediately before the end of the mill is accurately performed regardless of the type and hardness of the beans and fluctuations in the power supply voltage.
【００２１】この状態以降は実験により求めた所定時間
モータを駆動してミル終了の制御を行ってもよいが、こ
の状態に達した後さらにモータを駆動すると図４（ａ）
に示す如く、電圧値Ｖｎの変化が殆どなくなる。そこ
で、もう一つの発明はカウント値が所定回数に達した
後、所定時間Ｔ3（本実施例では５秒間）に於ける最大
電圧値ＶMAXと最小電圧値ＶMINを保持手段１８に記憶保
持し（Ｓ１２）、最大電圧値ＶMAXと最小電圧値ＶMINの
差を演算手段１３で演算し、その差を所定値（予め実験
により求めてＲＯＭに記憶させてあるところのミル終了
検知用変動幅値）以下かどうかを第３の比較手段１９で
比較し（Ｓ１４）、所定値以下であればミル動作終了で
あると判断して制御手段２０からトライアック４にＯＦ
Ｆ信号を出力してモータを停止させる（Ｓ６）と同時に
使用者にミル終了の報知を行う。所定値以上であればル
ーチンプログラムに戻り繰り返しミル終了検知を行う。After this state, the end of the mill may be controlled by driving the motor for a predetermined time determined by an experiment. However, if the motor is further driven after reaching this state, the motor shown in FIG.
As shown in the figure, there is almost no change in the voltage value Vn. Therefore, another invention is to store and hold the maximum voltage value V MAX and the minimum voltage value V MIN for a predetermined time T 3 (5 seconds in this embodiment) after the count value reaches a predetermined number in the holding means 18. (S12), the difference between the maximum voltage value V MAX and the minimum voltage value V MIN is calculated by the calculation means 13, and the difference is determined by a predetermined value (a variation for mill end detection which is obtained in advance by experiment and stored in ROM). The third comparing means 19 compares whether the value is equal to or less than the width value (S14). If the value is equal to or less than the predetermined value, it is determined that the mill operation has been completed, and the control means 20 sends an OF signal to the triac 4.
At the same time as outputting the F signal to stop the motor (S6), the user is notified of the end of the mill. If the value is equal to or more than the predetermined value, the process returns to the routine program to repeatedly detect the end of mill.
【００２２】又、前記ステップ８（Ｓ８）の比較に於い
て変化量が第２の所定量以下であればステップ１２（Ｓ
１２）、ステップ１３（Ｓ１３）に進んでミル内にコー
ヒー豆が入っていない状態すなわち無負荷状態の検知を
行い、ステップ１３（Ｓ１３）に於いて差が所定値以下
であれば、無負荷状態であると判断して制御手段２０か
らトライアック４にＯＦＦ信号を出力してモータを停止
させる（Ｓ６）と同時に使用者に無負荷状態である旨の
報知を行う。所定値以上であればルーチンプログラムに
戻る。尚、図４（ｃ）は無負荷状態に於ける検出電圧の
経時変化を示す図である。If the change in the comparison in step 8 (S8) is equal to or less than the second predetermined amount, step 12 (S8)
12), proceed to step 13 (S13) to detect a state in which no coffee beans are in the mill, that is, a no-load state, and if the difference is equal to or less than a predetermined value in the step 13 (S13), a no-load state Then, the control unit 20 outputs an OFF signal to the triac 4 to stop the motor (S6), and at the same time notifies the user that there is no load. If it is equal to or more than the predetermined value, the process returns to the routine program. FIG. 4C is a diagram showing a change over time of the detection voltage in the no-load state.
【００２３】[0023]
【発明の効果】以上のように本発明によれば、請求項１
及び請求項２記載の発明は、コーヒー豆の種類や硬さあ
るいは電源電圧の変動等に拘わらず、ミル終了検知を正
確に行うことができてミル終了を適確におこなうことが
でき、また、請求項３記載の発明は、電源電圧の変動等
に拘わらず、ミル内にコーヒー豆が入っていない状態す
なわち無負荷状態の検知を適確に行うことができて無負
荷運転による無駄な電力消費を確実に防止することがで
き、そして、請求項４記載の発明は、豆の種類や硬さあ
るいは電源電圧の変動等に拘わらず、豆詰まり等による
モータロック状態を適確に検知することができ、モータ
への障害、無駄な時間消費を確実に防止することができ
る。According to the present invention as described above, claim 1
The invention according to claim 2 is based on the type and hardness of the coffee beans.
Or mill end detection is correct regardless of fluctuations in the power supply voltage, etc.
It is possible to carry out the mill accurately and to finish the mill accurately
In addition, the invention according to claim 3 can be applied to the case where the power supply voltage fluctuates.
Despite the fact that there are no coffee beans in the mill,
In other words, no load condition can be detected accurately and
It is possible to reliably prevent wasteful power consumption due to load operation.
And the invention according to claim 4 is based on the type and hardness of the beans.
Or bean jam due to fluctuations in power supply voltage, etc.
The motor lock state can be detected accurately and the motor
Obstacles and unnecessary time consumption can be reliably prevented .
【図１】本発明のコーヒーミルに採用された電気回路図
である。FIG. 1 is an electric circuit diagram employed in a coffee mill of the present invention.
【図２】本発明によるコーヒーミルモータの駆動制御を
説明するためのブロック構成図である。FIG. 2 is a block diagram illustrating a driving control of a coffee mill motor according to the present invention.
【図３】本発明によるコーヒーミルモータの駆動制御を
説明するためのフローチャートである。FIG. 3 is a flowchart for explaining drive control of a coffee mill motor according to the present invention.
【図４】本発明によるコーヒーミルモータの駆動制御を
説明するための、ミル内の状態に応じた検出電圧の経時
変化を示す図である。FIG. 4 is a diagram for illustrating drive control of a coffee mill motor according to the present invention, showing a change over time of a detection voltage according to a state in the mill.
１ 直流モータ ５ 抵抗（電流検出用） １０ マイコン １１ 電流検出手段 １２ 記憶手段 １３ 演算手段 １４ 第１の比較手段 １５ 第２の比較手段 １７ 計数手段 １８ 保持手段 １９ 第３の比較手段 ２０ 制御手段 ２１ 第４の比較手段 DESCRIPTION OF SYMBOLS 1 DC motor 5 Resistance (for current detection) 10 Microcomputer 11 Current detection means 12 Storage means 13 Calculation means 14 First comparison means 15 Second comparison means 17 Counting means 18 Holding means 19 Third comparison means 20 Control means 21 Fourth comparison means
Claims (4)
するモータと、このモータに流れる電流を検出する電流
検出手段と、この電流検出手段からの検出出力を所定時
間毎に記憶する記憶手段と、この記憶手段に記憶した前
回の検出出力と今回の検出出力との変化量を演算する演
算手段と、この演算手段にて演算した前記モータの起動
突入期間経過後に於ける変化量と第２の所定量とを比較
する第２の比較手段と、コーヒー豆が略粉砕してモータ
電流が減少してゆく過程での変化量が第２の所定量以上
であるとの出力が前記第２の比較手段から所定回数連続
して出されたことを検出する計数手段と、この計数手段
の出力に基づいてコーヒー豆が略粉砕したとの判定を行
い前記モータの停止制御を行う制御手段とを具備してな
るコーヒーミル。1. A motor for rotationally driving a pulverized body for pulverizing coffee beans, current detection means for detecting a current flowing through the motor, and storage means for storing a detection output from the current detection means at predetermined time intervals. Calculating means for calculating the amount of change between the previous detection output and the current detection output stored in the storage means; and calculating the amount of change after the elapse of the motor inrush period calculated by the calculating means. A second comparing means for comparing with a predetermined amount, and an output indicating that the amount of change in the process of substantially grinding the coffee beans and decreasing the motor current is equal to or more than a second predetermined amount, and Counting means for detecting that the coffee beans are output continuously for a predetermined number of times , and determining that the coffee beans have been substantially ground based on the output of the counting means.
And a control means for performing stop control of the motor.
するモータと、このモータに流れる電流を検出する電流
検出手段と、この電流検出手段からの検出出力を所定時
間毎に記憶する記憶手段と、この記憶手段に記憶した前
回の検出出力と今回の検出出力との変化量を演算する演
算手段と、この演算手段にて演算した前記モータの起動
突入期間経過後に於ける変化量と第２の所定量とを比較
する第２の比較手段と、コーヒー豆が略粉砕してモータ
電流が減少してゆく過程での変化量が第２の所定量以上
であるとの出力が前記第２の比較手段から所定回数連続
して出されたことを検出する計数手段と、この計数手段
の出力に基づいて作動し所定時間に於ける検出出力の最
大値と最小値を保持する保持手段と、その最大値と最小
値との差を演算し、その差が所定値以下であるならばミ
ル終了として前記モータを停止させる停止制御手段とを
具備してなるコーヒーミル。2. A motor for rotationally driving a pulverized body for pulverizing coffee beans, current detection means for detecting a current flowing through the motor, and storage means for storing a detection output from the current detection means at predetermined time intervals. Calculating means for calculating the amount of change between the previous detection output and the current detection output stored in the storage means; and calculating the amount of change after the elapse of the motor inrush period calculated by the calculating means. A second comparing means for comparing with a predetermined amount, and an output indicating that the amount of change in the process of substantially grinding the coffee beans and decreasing the motor current is equal to or more than a second predetermined amount, and Counting means for detecting that a predetermined number of times has been continuously output from the means; holding means which operates based on the output of the counting means and holds the maximum value and the minimum value of the detection output for a predetermined time; Calculate the difference between the value and the minimum value, Mi if the difference is less than a predetermined value
And a stop control means for stopping the motor at the end of the mill.
するモータと、このモータに流れる電流を検出する電流
検出手段と、この電流検出手段からの検出出力を所定時
間毎に記憶する記憶手段と、この記憶手段に記憶した前
回の検出出力と今回の検出出力との変化量を演算する演
算手段と、この演算手段にて演算した前記モータの起動
突入期間経過後に於ける変化量と第２の所定量とを比較
する第２の比較手段と、変化量が第２の所定量以下であ
るとの前記第２の比較手段の出力に基づいて作動し所定
時間に於ける検出出力の最大値と最小値を保持する保持
手段と、その最大値と最小値との差を演算し、その差が
所定値以下であるならば無負荷運転として前記モータを
停止させる停止制御手段とを具備してなるコーヒーミ
ル。3. A motor for rotationally driving a pulverized body for pulverizing coffee beans, current detection means for detecting a current flowing through the motor, and storage means for storing a detection output from the current detection means at predetermined time intervals. Calculating means for calculating the amount of change between the previous detection output and the current detection output stored in the storage means; and calculating the amount of change after the elapse of the motor inrush period calculated by the calculating means. A second comparing means for comparing with a predetermined amount, and a maximum value of a detection output at a predetermined time which operates based on an output of the second comparing means that the change amount is equal to or less than a second predetermined amount. Holding means for holding a minimum value, and stop control means for calculating a difference between the maximum value and the minimum value and stopping the motor as a no-load operation if the difference is equal to or less than a predetermined value. Coffee mill.
するモータと、このモータに流れる電流を検出する電流
検出手段と、この電流検出手段からの検出出力を所定時
間毎に記憶する記憶手段と、この記憶手段に記憶した前
回の検出出力と今回の検出出力との変化量を演算する演
算手段と、この演算手段にて演算した変化量と第１の所
定量とを比較する第１の比較手段と、変化量が前記第１
の所定量以上であって今回の検出出力が所定出力以上な
らばモータロックとして前記モータの停止制御を行う制
御手段とを具備してなるコーヒーミル。4. A motor for rotationally driving a pulverized body for pulverizing coffee beans, current detection means for detecting a current flowing through the motor, and storage means for storing a detection output from the current detection means at predetermined time intervals. Calculating means for calculating the amount of change between the previous detection output and the present detection output stored in the storage means, and a first comparison for comparing the amount of change calculated by the calculating means with a first predetermined amount. Means, and the amount of change is the first
And a control means for performing stop control of the motor as a motor lock if the current detected output is equal to or more than a predetermined amount and the current detected output is equal to or more than the predetermined output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28834392A JP2872868B2 (en) | 1992-10-27 | 1992-10-27 | Coffee mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28834392A JP2872868B2 (en) | 1992-10-27 | 1992-10-27 | Coffee mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06133879A JPH06133879A (en) | 1994-05-17 |
| JP2872868B2 true JP2872868B2 (en) | 1999-03-24 |
Family
ID=17728978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28834392A Expired - Fee Related JP2872868B2 (en) | 1992-10-27 | 1992-10-27 | Coffee mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2872868B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2920288B1 (en) * | 2007-08-29 | 2009-10-23 | Seb Sa | METHOD FOR COUNTING THE NUMBER OF TURNS OF A WHEEL OF A COFFEE MILL AND APPARATUS COMPRISING SUCH A MILL |
| CN103082866B (en) * | 2013-01-29 | 2015-08-12 | 苏州工业园区咖乐美电器有限公司 | A kind of full-automatic coffee machine and self-locking power supply thereof |
| US9675211B2 (en) | 2015-03-06 | 2017-06-13 | Helen Of Troy Limited | No-bean detection for coffee bean grinder |
| JP7457452B2 (en) * | 2018-06-07 | 2024-03-28 | 三菱重工業株式会社 | Control device, control system, control method and control program |
-
1992
- 1992-10-27 JP JP28834392A patent/JP2872868B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06133879A (en) | 1994-05-17 |
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