JPH07265598A - Clothes dryer - Google Patents
Clothes dryerInfo
- Publication number
- JPH07265598A JPH07265598A JP6058750A JP5875094A JPH07265598A JP H07265598 A JPH07265598 A JP H07265598A JP 6058750 A JP6058750 A JP 6058750A JP 5875094 A JP5875094 A JP 5875094A JP H07265598 A JPH07265598 A JP H07265598A
- Authority
- JP
- Japan
- Prior art keywords
- rotation speed
- motor
- clogging
- output signal
- current
- 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
Links
Landscapes
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はモータで回転駆動される
回転ドラム内へ温風を循環して衣類を乾燥させる衣類乾
燥機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer which circulates warm air in a rotary drum which is driven by a motor to dry clothes.
【０００２】[0002]
【従来の技術】近年、家庭用の衣類乾燥機は、衣類を乾
燥させる回転ドラム内に糸屑などをとるフィルターを設
け、フィルターの糸屑が多くなって目詰まりした場合に
は、表示灯により目詰まりを報知する衣類乾燥機が提案
されている。2. Description of the Related Art In recent years, household clothes dryers are provided with a filter for removing lint in a rotary drum for drying clothes. A clothes dryer that reports clogging has been proposed.
【０００３】従来、この種の衣類乾燥機は、特開昭５５
−１６６３１号公報に示すように構成されていた。すな
わち、正特性感温抵抗ヒータ（以下、ＰＴＣヒータとい
う）の電流変化をカレントトランスにより検出し、この
検出したＰＴＣヒータ電流が設定値より小さければ目詰
まり報知するようにしていた。Conventionally, a clothes dryer of this type has been disclosed in Japanese Patent Laid-Open No. Sho 55.
It was configured as shown in Japanese Patent Publication No. 16631. That is, the current change of the positive temperature coefficient resistor (hereinafter referred to as PTC heater) is detected by the current transformer, and if the detected PTC heater current is smaller than the set value, clogging is notified.
【０００４】[0004]
【発明が解決しようとする課題】このような従来の衣類
乾燥機では、ＰＴＣヒータ電流は、その吸気温度、風
量、電圧により変化し、夏、冬の季節変化や、電圧変
化、布量によるＰＴＣヒータの電流変化の方が目詰まり
による電流変化よりもずっと大きいため、すべての変動
を考慮して電流変化のみにより目詰まりを検知できる設
定値を求めることはほとんど不可能に近く、実際には目
詰まり状態の検知は不可能であるという問題を有してい
た。In such a conventional clothes dryer, the PTC heater current changes depending on the intake air temperature, the air volume, and the voltage, and the PTC due to the seasonal changes in summer and winter, the voltage change, and the cloth amount. Since the current change of the heater is much larger than the current change due to clogging, it is almost impossible to find a set value that can detect clogging by only the current change considering all the fluctuations. There is a problem that it is impossible to detect the clogging state.
【０００５】本発明は上記従来課題を解決するもので、
温度変化や電圧変化、風量変化に影響されなれることな
く、フィルターの目詰まりを検知できるようにすること
を目的としている。The present invention solves the above conventional problems.
The purpose is to detect filter clogging without being affected by temperature changes, voltage changes, and air flow changes.
【０００６】[0006]
【課題を解決するための手段】本発明は上記目的を達成
するために、衣類を乾燥させる回転ドラムと、前記回転
ドラム内へ温風を循環させる送風手段と、前記回転ドラ
ム内への送風経路に設けたＰＴＣヒータと、前記送風経
路に設けたフィルターと、前記送風手段または前記回転
ドラムを回転駆動するモータと、前記回転ドラム、モー
タなどの回転数または回転周期を検知する回転検知手段
と、前記モータの回転数または前記ＰＴＣヒータを制御
する制御手段と、前記ＰＴＣヒータへの送風経路に設け
た温度検知手段と、前記制御手段に接続され前記ＰＴＣ
ヒータの電流を検知する電流検知手段と、報知手段とを
備え、前記制御手段は、前記モータの回転数を制御可能
なほぼ最低回転数に設定し、前記温度検知手段の出力信
号と前記電流検知手段の出力信号とにより前記フィルタ
ーの目詰まりを検知するようにしたことを第１の課題解
決手段としている。In order to achieve the above object, the present invention provides a rotating drum for drying clothes, an air blowing means for circulating warm air into the rotating drum, and an air blowing path into the rotating drum. A PTC heater provided in, a filter provided in the air blowing path, a motor that rotationally drives the air blowing unit or the rotating drum, and a rotation detecting unit that detects the number of rotations or the rotation cycle of the rotating drum, the motor, or the like. Control means for controlling the number of revolutions of the motor or the PTC heater, temperature detecting means provided in a ventilation path to the PTC heater, and the PTC connected to the control means.
A current detection means for detecting the current of the heater and a notification means are provided, and the control means sets the rotation speed of the motor to a substantially minimum controllable rotation speed, and outputs the output signal of the temperature detection means and the current detection. The first problem solving means is to detect the clogging of the filter by the output signal of the means.
【０００７】また、上記第１の課題解決手段の制御手段
は、運転起動時に回転ドラムまたはモータ回転数をほぼ
最低の回転数に一定期間設定した後、温度検知手段の出
力信号と電流検知手段の出力信号とによりフィルターの
目詰まりを検知するようにしたことを第２の課題解決手
段としている。Further, the control means of the first problem solving means sets the rotation drum or the motor rotation speed to a substantially minimum rotation speed for a certain period at the time of starting the operation, and then outputs the output signal of the temperature detection means and the current detection means. The second problem solving means is to detect clogging of the filter based on the output signal.
【０００８】さらに、上記第１の課題解決手段の制御手
段は、乾燥運転中に回転ドラムまたはモータ回転数を制
御可能なほぼ最低の回転数に一定期間設定した後、温度
検知手段の出力信号と電流検知手段の出力信号とにより
フィルターの目詰まりを検知し、乾燥運転終了後報知す
るようにしたことを第３の課題解決手段としている。Further, the control means of the first problem solving means sets the rotation drum or the motor rotation speed during the drying operation to a substantially minimum controllable rotation speed for a certain period, and then outputs the output signal of the temperature detection means. The third problem solving means is that clogging of the filter is detected based on the output signal of the current detection means and is notified after the completion of the drying operation.
【０００９】[0009]
【作用】本発明は上記した第１の課題解決手段により、
ＰＴＣヒータの吸気温度とＰＴＣヒータに加わる電力と
よりフィルターの目詰まりを検知し、電圧変化や温度変
化に関わらず目詰まりを正確に検知できる。According to the first means for solving the above problems, the present invention provides:
The clogging of the filter can be detected by the intake air temperature of the PTC heater and the electric power applied to the PTC heater, and the clogging can be accurately detected regardless of the voltage change and the temperature change.
【００１０】また、第２の課題解決手段により、ＰＴＣ
ヒータ電流を下げた状態で起動して、ＰＴＣヒータの突
入電流による電源ブレーカの遮断などの発生がなく、こ
の運転起動初期にフィルターの目詰まりを検知できるた
め、目詰まり検知精度を向上できる。Further, according to the second problem solving means, the PTC
Since the power supply breaker is not shut off due to the inrush current of the PTC heater when the heater current is lowered, the filter clogging can be detected at the initial stage of starting the operation, so that the clogging detection accuracy can be improved.
【００１１】さらに、第３の課題解決手段により、制御
可能なほぼ最低の回転数で一定時間運転することによ
り、検知風量を下げて風量変化に対する電流変化を大き
くできるので目詰まり検知精度を向上でき、また、運転
終了後報知するので、運転中に表示する場合に比べて使
用者の不安や不審、あるいは、運転を中止して掃除する
等の誤使用を防止できる。Further, according to the third means for solving the problem, the detected air volume can be lowered and the current change with respect to the air volume change can be increased by operating for a certain period of time at a controllable minimum rotation speed, so that the clogging detection accuracy can be improved. Further, since the notification is given after the driving is completed, it is possible to prevent the user's anxiety and suspicion, or the misuse such as the driving being stopped and the cleaning being performed, as compared with the case where the information is displayed during the driving.
【００１２】[0012]
【実施例】以下、本発明の一実施例を図１および図２を
参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１３】図に示すように、回転ドラム１は被乾燥物
（衣類）を収容して乾燥させるもので、熱交換型両翼フ
ァン（送風手段）２により回転ドラム１内に温風を循環
させる。熱交換型両翼ファン２は、回転ドラム１内に温
風を循環させると同時に外部からの空気を取り入れてフ
ァンを冷却し、回転ドラム１の循環空気を除湿する。Ｐ
ＴＣヒータ（加熱手段）３は、回転ドラム１への送風経
路、すなわち循環空気取入れ口に配設して循環空気を加
熱する。As shown in the figure, a rotary drum 1 is for accommodating and drying an object to be dried (clothes), and hot air is circulated in the rotary drum 1 by a heat exchange type double-blade fan (blowing means) 2. The heat exchange type double-blade fan 2 circulates warm air in the rotary drum 1 and at the same time takes in air from the outside to cool the fan and dehumidify the circulating air in the rotary drum 1. P
The TC heater (heating means) 3 is arranged in the air blowing path to the rotary drum 1, that is, in the circulating air intake, and heats the circulating air.
【００１４】フィルター４は熱交換型両翼ファン２の送
風経路、すなわち回転ドラム１内の空気の排気口に設け
ている。糸屑などによりフィルター４が目詰まりする
と、送風量が減ってＰＴＣヒータ３の加熱電力が減少
し、乾燥時間が長くなり乾燥効率も低下する。モータ５
は、回転ドラム１と熱交換型両翼ファン２を回転駆動さ
せるもので、モータ５の回転数を制御することにより回
転ドラム１と熱交換型両翼ファン２の回転数を制御で
き、ＰＴＣヒータ３の発熱量を制御でき電流制御が可能
となる。温度検知手段６は、ＰＴＣヒータ３の吸い込み
空気温度を検知するものである。The filter 4 is provided in the air blowing path of the heat exchange type double-blade fan 2, that is, in the air outlet of the rotary drum 1. When the filter 4 is clogged with lint and the like, the amount of blown air is reduced, the heating power of the PTC heater 3 is reduced, the drying time is lengthened, and the drying efficiency is also reduced. Motor 5
Is for rotating and driving the rotary drum 1 and the heat exchange type double-blade fan 2. By controlling the rotation speed of the motor 5, the rotation speeds of the rotary drum 1 and the heat exchange-type double-blade fan 2 can be controlled. The amount of heat generation can be controlled and the current can be controlled. The temperature detection means 6 detects the temperature of the air sucked into the PTC heater 3.
【００１５】回転検知手段７は、回転ドラム１の回転数
を検知するするもので、回転ドラム１に磁石８を２〜６
個取り付け、磁気センサ（図示せず）を本体部に固定し
て回転ドラム１の回転数を検知する。制御手段９はモー
タ５の回転数とＰＴＣヒータ３を制御するもので、回転
ドラム１の回転数を設定する回転数設定手段１０と、回
転検知手段７の出力と回転数設定手段１０の出力を比較
する回転数比較手段１１と、回転数比較手段１１の出力
によりモータ５に直列に接続した双方向性サイリスタ１
２の導通角を制御する導通角制御手段１３と、モータ５
の起動時に設定回転数を低くする低速起動手段１４と、
温度検知手段６の出力を入力する温度制御手段１５およ
び目詰まり検知レベル設定手段１６と、目詰まり検知レ
ベル設定手段１６の出力と電流検知手段１７の出力とを
比較する目詰まり報知判定手段１８とで構成している。The rotation detecting means 7 detects the number of rotations of the rotary drum 1, and has magnets 2 to 6 on the rotary drum 1.
Individually attached, a magnetic sensor (not shown) is fixed to the main body to detect the number of rotations of the rotary drum 1. The control means 9 controls the rotation speed of the motor 5 and the PTC heater 3, and controls the rotation speed setting means 10 for setting the rotation speed of the rotary drum 1, the output of the rotation detection means 7 and the output of the rotation speed setting means 10. The rotation speed comparison means 11 for comparison and the bidirectional thyristor 1 connected in series to the motor 5 by the output of the rotation speed comparison means 11.
The conduction angle control means 13 for controlling the conduction angle of 2 and the motor 5
Low speed starting means 14 for lowering the set speed at the time of starting,
A temperature control means 15 and a clogging detection level setting means 16 for inputting the output of the temperature detection means 6, and a clogging notification determination means 18 for comparing the output of the clogging detection level setting means 16 and the output of the current detection means 17. It consists of.
【００１６】回転検知手段７により検知した回転ドラム
１の回転数と、回転数設定手段１０からの設定回転数の
差を回転数比較手段１１により比較し、導通角制御手段
１３により双方向性サイリスタ１２を制御してモータ５
の回転数を制御する。最も簡単な導通時間制御方法とし
て位相制御が考えられる。インバータの場合は導通時間
だけではなく周波数も制御する。このようにすれば、モ
ータ５と回転ドラム１の安定な回転制御ができる。The rotation speed comparison means 11 compares the difference between the rotation speed of the rotary drum 1 detected by the rotation detection means 7 and the set rotation speed from the rotation speed setting means 10, and the conduction angle control means 13 causes the bidirectional thyristor. 12 to control the motor 5
Control the rotation speed of. Phase control can be considered as the simplest conduction time control method. In the case of an inverter, not only the conduction time but also the frequency is controlled. By doing so, stable rotation control of the motor 5 and the rotary drum 1 can be performed.
【００１７】また、回転ドラム１の循環空気の温度を検
知する温度検知手段６の出力を温度制御手段１５に入力
し、この温度制御手段１５の出力によりＰＴＣヒータ３
ａ、３ｂにそれぞれ接続したリレー接点１９ａ、１９ｂ
を制御し、ＰＴＣヒータ３ａ、３ｂをオン、オフ制御し
て循環空気の温度を制御する。さらに、温度検知手段６
の出力を入力する目詰まり検知レベル設定手段１６の出
力と電流検知手段１７の出力とを報知判定手段１８に入
力して、報知手段２０によりフィルター４の目詰まりを
報知するようにしている。The output of the temperature detecting means 6 for detecting the temperature of the circulating air of the rotary drum 1 is input to the temperature control means 15, and the output of the temperature control means 15 causes the PTC heater 3 to operate.
relay contacts 19a and 19b respectively connected to a and 3b
Is controlled to control the temperature of the circulating air by controlling the on / off of the PTC heaters 3a and 3b. Further, the temperature detecting means 6
The output of the clogging detection level setting means 16 and the output of the current detecting means 17 are input to the notification determining means 18, and the notifying means 20 notifies the clogging of the filter 4.
【００１８】操作設定手段２１は、制御手段９に接続さ
れ複数種類の運転コースを操作設定するもので、回転数
設定手段１０に入力して回転ドラム１の回転数を運転コ
ースに応じた回転数に設定できるようにするとともに、
温度制御手段１５に入力して温度検知手段６の出力に応
じて回転ドラム１内の温度を運転コースに応じて制御す
るようにしている。The operation setting means 21 is connected to the control means 9 to operate and set a plurality of types of driving courses, and is inputted to the rotation number setting means 10 so that the number of rotations of the rotary drum 1 can be changed according to the driving courses. It is possible to set to
The temperature inside the rotary drum 1 is controlled according to the output of the temperature detection means 6 by inputting to the temperature control means 15.
【００１９】電流検知手段１７は、カレントトランス２
２と電流−電圧変換回路２３とで構成し、ＰＴＣヒータ
３の入力電流を検知し、その出力を電流比較設定手段２
４に入力する。電流比較設定手段２４は、ＰＴＣヒータ
３の設定電流値と電流検知手段１７の出力とを比較し、
その出力を回転数設定手段１０に入力して設定回転数を
制御する。ここで、回転数設定手段１０により設定され
る設定回転数は、ＰＴＣヒータ３の電流が所定の電流値
以上または以下にならない風量になるように設定する。The current detecting means 17 is the current transformer 2
2 and the current-voltage conversion circuit 23, detects the input current of the PTC heater 3, and outputs the output from the current comparison setting means 2
Enter in 4. The current comparison setting means 24 compares the set current value of the PTC heater 3 with the output of the current detection means 17,
The output is input to the rotation speed setting means 10 to control the set rotation speed. Here, the set rotation speed set by the rotation speed setting means 10 is set so that the current of the PTC heater 3 does not exceed or fall below a predetermined current value.
【００２０】電流検知手段１７の出力は、また、温度検
知手段６の出力によって目詰まり検知レベルを演算する
目詰まり検知レベル設定手段１６の出力とともに目詰ま
り報知判定手段１８に入力し、モータ５の回転数を制御
可能なほぼ最低回転数に設定した状態で、目詰まり検知
レベル設定手段１７の出力と電流検知手段１７の出力と
を比較し、報知手段２０によりフィルター４の目詰まり
を報知するようにしている。すなわち、熱交換型両翼フ
ァン２の回転制御を行うことにより、目詰まり検知時の
送風条件を一定に設定している。The output of the current detection means 17 is also input to the clogging notification determination means 18 together with the output of the clogging detection level setting means 16 which calculates the clogging detection level by the output of the temperature detection means 6, and the motor 5 The output of the clogging detection level setting means 17 and the output of the current detection means 17 are compared with each other in a state where the rotation speed is set to a minimum controllable rotation speed, and the notification means 20 notifies the clogging of the filter 4. I have to. That is, by controlling the rotation of the heat exchange type double-blade fan 2, the blowing condition at the time of detecting clogging is set to be constant.
【００２１】上記構成において図３から図７を参照しな
がら動作を説明すると、まず、図３は本発明による目詰
まり検知方法を示すための、ＰＴＣヒータ３の入力電力
Ｐと吸気温度Ｔの特性図であり、ＰＴＣヒータ３の入力
電力Ｐは、キュリー温度Ｔｑと吸気温度Ｔの温度差ΔＴ
と放熱係数Ｈの積で表され、 Ｐ＝Ｈ（Ｔｑ−Ｔ） となる。フィルター４が目詰まりすると、目詰まりによ
る風量低下で放熱係数Ｈが低下するので、キュリー温度
Ｔｑは一定であるから、入力電力Ｐと吸気温度Ｔより放
熱係数Ｈを求めることができ、目詰まりを推定すること
ができる。The operation of the above structure will be described with reference to FIGS. 3 to 7. First, FIG. 3 shows the characteristics of the input power P of the PTC heater 3 and the intake air temperature T for showing the clogging detection method according to the present invention. In the figure, the input electric power P of the PTC heater 3 is the temperature difference ΔT between the Curie temperature Tq and the intake air temperature T.
Is represented by the product of the heat dissipation coefficient H, and P = H (Tq-T). When the filter 4 is clogged, the heat radiation coefficient H is lowered due to the decrease in the air volume due to the clogging, so that the Curie temperature Tq is constant, so the heat radiation coefficient H can be obtained from the input power P and the intake air temperature T, and the clogging is prevented. Can be estimated.
【００２２】図３における特性Ａは、衣類が少ない場合
のＰＴＣヒータ３の入力電流Ｉと吸気温度Ｔの関係を示
しており、特性Ａ’は衣類が多い場合、特性Ｂはフィル
ター目詰まりの場合の特性を示している。Ｉsは目詰ま
りを判定するための吸気温度Ｔに対するＰＴＣヒータ３
の入力電流Ｉの目詰まり検知レベルを示している。検知
レベルＩsは吸気温度Ｔに対応して、 Ｉs＝Ｋ−ｋＴ のようにほぼ直線的に設定できる。ここでＫ、ｋは定数
である。Characteristic A in FIG. 3 shows the relationship between the input current I of the PTC heater 3 and the intake air temperature T when the amount of clothes is small, and the characteristic A'is when the amount of clothes is large and the characteristic B is when the filter is clogged. Shows the characteristics of. Is is the PTC heater 3 for the intake air temperature T for determining clogging.
3 shows the clogging detection level of the input current I of FIG. The detection level Is can be set approximately linearly as Is = K−kT, corresponding to the intake air temperature T. Here, K and k are constants.
【００２３】つぎに、目詰まり検知は、回転ドラム１の
回転数、いいかえればモータ５の回転数を一定に制御し
て行う。すなわち、図４に示すように、時刻ｔ0で低速
起動手段１４により回転数設定手段１０の設定回転数を
低速回転数ｎ1（通常運転時の回転ドラム１の回転数４
５ｒｐｍに対して、たとえば３６ｒｐｍ）に設定してス
タートする。そして、所定時間（たとえば３分）経過し
た時刻ｔ1で温度検知手段６により検知した温度にした
がって回転数設定手段１０により設定回転数を演算し、
この設定回転数に基づいて、モータ５の回転数を制御
し、徐々に回転数を上昇させる。最終的に設定された上
限回転数ｎ2となり、時刻ｔ2以降はほぼ一定の回転数と
なる。目詰まり検知は、時刻ｔ1の１〜２分前に検知を
行う。Next, the clogging is detected by controlling the rotation speed of the rotary drum 1, that is, the rotation speed of the motor 5 to be constant. That is, as shown in FIG. 4, at the time t0, the low-speed starting means 14 changes the set rotation speed of the rotation speed setting means 10 to the low-speed rotation speed n1 (the rotation speed 4 of the rotary drum 1 in the normal operation).
For example, 36 rpm is set for 5 rpm, and the operation is started. Then, at a time t1 when a predetermined time (for example, 3 minutes) has elapsed, the rotational speed setting means 10 calculates the set rotational speed according to the temperature detected by the temperature detecting means 6,
The rotation speed of the motor 5 is controlled based on this set rotation speed, and the rotation speed is gradually increased. The final upper limit rotation speed n2 is reached, and the rotation speed is substantially constant after time t2. The clogging is detected 1-2 minutes before the time t1.
【００２４】図５は、ＰＴＣヒ−タ３の風量とヒ−タ電
流特性で、電源電圧は一定とする。運転初期には、熱交
換型両翼ファン２の回転数を減らしてＰＴＣヒ−タ３を
循環する風量を下げるので、風量Ｑ1、ヒ−タ電流Ｉ1
は、ファン回転数が高い場合の風量Ｑ2 、ヒ−タ電流Ｉ
2と比較し少なくでき、突入電流も減らすことができ
る。FIG. 5 shows the air flow rate and heater current characteristics of the PTC heater 3, and the power supply voltage is constant. At the initial stage of operation, the rotation speed of the heat exchange type double-blade fan 2 is reduced to reduce the air volume circulating through the PTC heater 3, so that the air volume Q1 and the heater current I1.
Is the air flow Q2 and the heater current I when the fan speed is high.
It can be reduced compared to 2, and the inrush current can also be reduced.
【００２５】また、フィルタ−が目詰まりした場合の風
量変化率（Ｑ1−Ｑ1'）に対する電流変化率（Ｉ1−Ｉ
1'）は、熱交換型両翼ファン２の回転数が高い場合の風
量変化率（Ｑ2−Ｑ2'）に対する電流変化率（Ｉ2−Ｉ
2'）に比べて高くなる。よって、目詰まり検知時の熱交
換型両翼ファン２の回転数を下げることにより、フィル
タ−目詰まりによる電流変化率を高くして目詰まり検知
精度を向上させることができる。The rate of change in current (I1-I) with respect to the rate of change in air volume (Q1-Q1 ') when the filter is clogged.
1 ') is the current change rate (I2-I) with respect to the air flow rate change rate (Q2-Q2') when the rotation speed of the heat exchange type double-blade fan 2 is high.
2 ') will be higher. Therefore, by lowering the rotation speed of the heat exchange type double-blade fan 2 at the time of detecting clogging, it is possible to increase the current change rate due to the clogging of the filter and improve the clogging detection accuracy.
【００２６】つぎに、図６を参照しながら動作の詳細を
説明すると、ステップ３０で開始し、ステップ３１で操
作設定手段２１により初期設定した後、ステップ３２で
ソフトスタートする。すなわち、低速起動手段１４によ
り回転数設定手段１０の設定回転数を低速回転数ｎ1に
設定してスタートする。そして、ステップ３３で設定回
転数を制御可能な最低回転数（ｎ1より低い場合もあ
る）に設定して目詰まり検知を行う。Next, the operation will be described in detail with reference to FIG. 6. The operation starts in step 30, is initialized by the operation setting means 21 in step 31, and is soft-started in step 32. That is, the low speed starting means 14 sets the set rotation speed of the rotation speed setting means 10 to the low speed rotation speed n1 and starts. Then, in step 33, the set rotation speed is set to the minimum controllable rotation speed (which may be lower than n1) to detect clogging.
【００２７】つぎに、ステップ３４で電流検知手段１７
によりＰＴＣヒータ３の電流を検知し、電流比較設定手
段２４を介して回転数設定手段１０に入力して、ステッ
プ３５で設定回転数を演算し、この設定回転数に基づい
て、ステップ３６でモータ５の回転数を制御し、ステッ
プ３７、３８を介してステップ３９へ進みステップ３３
で目詰まり報知フラグがオンとなった場合に目詰まり報
知を行う。Next, at step 34, the current detection means 17
Detects the current of the PTC heater 3 and inputs it to the rotation speed setting means 10 through the current comparison setting means 24, calculates the setting rotation speed in step 35, and based on this setting rotation speed, the motor in step 36. The rotational speed of 5 is controlled, and the process proceeds to step 39 through steps 37 and 38 and step 33
If the clogging notification flag is turned on, the clogging notification is given.
【００２８】この目詰まり検知動作を図７を参照しなが
ら説明すると、ステップ５０で目詰まり検知サブルーチ
ンを開始し、ステップ５１で回転ドラム１の回転数をほ
ぼ最低回転数ｎ1に一定に制御する。ステップ５２で一
定時間（たとえば３分）遅延させた後、ステップ５３で
温度検知手段６により循環空気の温度を検知する。つぎ
に、ステップ５４で、目詰まり検知レベル設定手段１５
により図３に示した検知レベルＩsを演算する。The clogging detection operation will be described with reference to FIG. 7. In step 50, the clogging detection subroutine is started, and in step 51, the rotation speed of the rotary drum 1 is controlled to be substantially the minimum rotation speed n1. After delaying for a fixed time (for example, 3 minutes) in step 52, the temperature of the circulating air is detected by the temperature detecting means 6 in step 53. Next, in step 54, the clogging detection level setting means 15
Then, the detection level Is shown in FIG. 3 is calculated.
【００２９】その後、ステップ５５で電流検知手段１７
によりＰＴＣヒータ３の電流Ｉを検知し、ステップ５６
で、検知レベルＩsと電流Ｉとを比較する。フィルター
４が目詰まりを起こすことにより循環空気量が減少し、
Ｉ＜Ｉsであれば、ステップ５７で、目詰まり報知フラ
グをオンし、運転終了後目詰まり報知判定手段１８より
出力を出し、報知手段２０により目詰まり報知を可能と
する。そして、ステップ５８で目詰まり検知フラグをオ
ンし、ステップ５９へ進み、図６のステップ３３へ戻
る。Thereafter, in step 55, the current detecting means 17
The current I of the PTC heater 3 is detected by
Then, the detection level Is and the current I are compared. Since the filter 4 becomes clogged, the amount of circulating air decreases,
If I <Is, in step 57, the clogging notification flag is turned on, an output is output from the clogging notification determination means 18 after the end of the operation, and the clogging notification is enabled by the notification means 20. Then, in step 58, the clogging detection flag is turned on, the process proceeds to step 59, and the process returns to step 33 of FIG.
【００３０】以上のように本実施例によれば、運転起動
時に回転ドラム１の回転数をほぼ最低の回転数に設定し
た後、通常回転数に上昇させる前に、制御可能なほぼ最
低の回転数に一定時間設定した後、温度検知手段６の出
力信号と電流検知手段１７の出力信号とによりフィルタ
ー４の目詰まりを検知するようにしたから、温度変化や
電圧変化に影響されることなくフィルターの目詰まりを
検知でき、検知精度を向上できる。As described above, according to this embodiment, after the rotational speed of the rotary drum 1 is set to the minimum rotational speed at the time of starting the operation, before the rotational speed is increased to the normal rotational speed, the controllable minimum rotational speed is set. After setting the number for a certain period of time, the clogging of the filter 4 is detected by the output signal of the temperature detecting means 6 and the output signal of the current detecting means 17, so that the filter is not affected by temperature change or voltage change. The clogging of can be detected, and the detection accuracy can be improved.
【００３１】[0031]
【発明の効果】以上のように本発明によれば、衣類を乾
燥させる回転ドラムと、前記回転ドラム内へ温風を循環
させる送風手段と、前記回転ドラム内への送風経路に設
けたＰＴＣヒ−タと、前記送風経路に設けたフィルタ−
と、前記送風手段または前記回転ドラムを回転駆動する
モ−タと、前記回転ドラム、モ−タなどの回転数または
回転周期を検知する回転検知手段と、前記モ−タの回転
数または前記ＰＴＣヒ−タを制御する制御手段と、前記
ＰＴＣヒ−タへの送風経路に設けた温度検知手段と、前
記制御手段に接続され前記ＰＴＣヒ−タの電流を検知す
る電流検知手段と、報知手段とを備え、前記制御手段
は、前記モ−タの回転数を制御可能なほぼ最低回転数に
設定し、前記温度検知手段の出力信号と前記電流検知手
段の出力信号とにより前記フィルターの目詰まりを検知
するようにしたから、ＰＴＣヒ−タの吸気温度とＰＴＣ
ヒ−タに加わる電力とによりフィルタ−の目詰まりを検
知でき、電圧変化や温度変化に関わらず目詰まりを正確
に検知できる。As described above, according to the present invention, a rotating drum for drying clothes, a blowing means for circulating warm air into the rotating drum, and a PTC heater provided in a blowing path into the rotating drum. -And a filter provided in the air flow path-
A motor for rotating and driving the blower means or the rotating drum; a rotation detecting means for detecting the number of rotations or a rotation cycle of the rotating drum, the motor or the like; the number of rotations of the motor or the PTC. Control means for controlling the heater, temperature detecting means provided in the air blowing path to the PTC heater, current detecting means connected to the controlling means for detecting the current of the PTC heater, and notifying means. The control means sets the rotation speed of the motor to a substantially controllable rotation speed, and the clogging of the filter is caused by the output signal of the temperature detection means and the output signal of the current detection means. Is detected, the intake temperature of the PTC heater and the PTC
The clogging of the filter can be detected by the electric power applied to the heater, and the clogging can be accurately detected regardless of the voltage change and the temperature change.
【００３２】また、制御手段は、運転起動時に回転ドラ
ムまたはモータ回転数をほぼ最低の回転数に設定した
後、温度検知手段の出力信号と電流検知手段の出力信号
とによりフィルターの目詰まりを検知するようにしたか
ら、ＰＴＣヒータ電流を下げた状態で起動して、ＰＴＣ
ヒータの突入電流による電源ブレーカの遮断などの発生
がなく、この運転起動初期にフィルターの目詰まりを検
知できるため、目詰まり検知精度を向上させることがで
きる。Further, the control means detects the clogging of the filter by the output signal of the temperature detection means and the output signal of the current detection means after setting the rotation speed of the rotating drum or the motor to a substantially minimum rotation speed at the time of starting the operation. Therefore, the PTC heater current is reduced to start the
Since the power supply breaker is not interrupted by the inrush current of the heater and the clogging of the filter can be detected at the initial stage of the operation start, the clogging detection accuracy can be improved.
【００３３】さらに、制御手段は、乾燥運転中に回転ド
ラムまたはモータ回転数を制御可能なほぼ最低回転数に
一定期間設定した後、温度検知手段の出力信号と電流検
知手段の出力信号とによりフィルターの目詰まりを検知
し、運転終了後報知するようにしたから、使用者が運転
中にフィルタ−を掃除するなどの誤使用を防止できる。Further, the control means sets the rotation speed of the rotating drum or the motor to a controllable minimum rotation speed during the drying operation for a certain period of time, and then filters the output signal of the temperature detection means and the output signal of the current detection means. Since the clogging of the filter is detected and the notification is given after the driving is completed, it is possible to prevent the user from misusing such as cleaning the filter during driving.
【図１】本発明の一実施例の衣類乾燥機のブロック図FIG. 1 is a block diagram of a clothes dryer according to an embodiment of the present invention.
【図２】同衣類乾燥機の断面図FIG. 2 is a sectional view of the clothes dryer.
【図３】同衣類乾燥機のＰＴＣヒータの吸気温度と電流
との関係を示す図FIG. 3 is a diagram showing a relationship between an intake air temperature of a PTC heater of the clothes dryer and an electric current.
【図４】同衣類乾燥機のフィルター目詰まり検知時の回
転数変化を示す図FIG. 4 is a diagram showing a change in the number of revolutions when a filter clogging of the clothes dryer is detected.
【図５】同衣類乾燥機のＰＴＣヒ−タの風量とヒ−タ電
流との関係を示す図FIG. 5 is a diagram showing the relationship between the air flow rate of the PTC heater and the heater current of the clothes dryer.
【図６】同衣類乾燥機の動作フローチャートFIG. 6 is an operation flowchart of the clothes dryer.
【図７】同衣類乾燥機のフィルター目詰まり検知のフロ
ーチャートFIG. 7 is a flowchart for detecting a filter clogging of the clothes dryer.
１ 回転ドラム ２ 熱交換型両翼ファン（送風手段） ３ ＰＴＣヒータ（加熱手段） ４ フィルター ５ モータ ６ 温度検知手段 ７ 回転検知手段 ９ 制御手段 １７ 電流検知手段 ２０ 報知手段 DESCRIPTION OF SYMBOLS 1 rotating drum 2 heat exchange type double-blade fan (blowing means) 3 PTC heater (heating means) 4 filter 5 motor 6 temperature detection means 7 rotation detection means 9 control means 17 current detection means 20 notification means
フロントページの続き (72)発明者 荘司 彰 大阪府門真市大字門真1006番地 松下電器 産業株式会社内Front page continuation (72) Inventor Shoji Akira 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (3)
転ドラム内へ温風を循環させる送風手段と、前記回転ド
ラム内への送風経路に設けた加熱手段と、前記送風経路
に設けたフィルターと、前記送風手段または前記回転ド
ラムを回転駆動するモータと、前記回転ドラム、モータ
などの回転数または回転周期を検知する回転検知手段
と、前記モータの回転数および前記加熱手段を制御する
制御手段と、前記加熱手段への送風経路に設けた温度検
知手段と、前記制御手段に接続され前記加熱手段の電流
を検知する電流検知手段と、報知手段とを備え、前記制
御手段は、前記モータの回転数を制御可能なほぼ最低回
転数に設定し、前記温度検知手段の出力信号と前記電流
検知手段の出力信号とにより前記フィルターの目詰まり
を検知するようにした衣類乾燥機。1. A rotating drum for drying clothes, a blowing unit for circulating warm air into the rotating drum, a heating unit provided in a blowing route into the rotating drum, and a filter provided in the blowing route. A motor for rotationally driving the blower means or the rotary drum; a rotation detection means for detecting the rotation speed or rotation cycle of the rotary drum, the motor or the like; and a control means for controlling the rotation speed of the motor and the heating means. A temperature detection unit provided in a blowing path to the heating unit, a current detection unit connected to the control unit for detecting a current of the heating unit, and an informing unit, wherein the control unit rotates the motor. The number of rotations is set to a controllable minimum number of revolutions, and clogging of the filter is detected by the output signal of the temperature detection means and the output signal of the current detection means. Clothes dryer.
たはモータ回転数をほぼ最低の回転数に一定期間設定し
た後、温度検知手段の出力信号と電流検知手段の出力信
号とによりフィルターの目詰まりを検知するようにした
請求項１記載の衣類乾燥機。2. The control means sets the rotating drum or motor rotation speed at a substantially minimum rotation speed for a certain period at the time of starting operation, and then the filter clogging is caused by the output signal of the temperature detection means and the output signal of the current detection means. 2. The clothes dryer according to claim 1, wherein the clothes dryer is detected.
たはモータ回転数を制御可能なほぼ最低の回転数に一定
期間設定した後、温度検知手段の出力信号と電流検知手
段の出力信号とによりフィルターの目詰まりを検知し、
乾燥運転終了後報知するようにした請求項１記載の衣類
乾燥機。3. The control means sets the rotation speed of the rotating drum or motor to a controllable minimum rotation speed for a certain period of time during a drying operation, and then controls the output signal of the temperature detection means and the output signal of the current detection means. Detects filter clogging,
The clothes dryer according to claim 1, wherein the notification is made after the completion of the drying operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05875094A JP3446292B2 (en) | 1994-03-29 | 1994-03-29 | Clothes dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05875094A JP3446292B2 (en) | 1994-03-29 | 1994-03-29 | Clothes dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07265598A true JPH07265598A (en) | 1995-10-17 |
| JP3446292B2 JP3446292B2 (en) | 2003-09-16 |
Family
ID=13093224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05875094A Expired - Lifetime JP3446292B2 (en) | 1994-03-29 | 1994-03-29 | Clothes dryer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3446292B2 (en) |
-
1994
- 1994-03-29 JP JP05875094A patent/JP3446292B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3446292B2 (en) | 2003-09-16 |
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