JP2012085835A - Control device for washing machine - Google Patents

Control device for washing machine Download PDF

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JP2012085835A
JP2012085835A JP2010235323A JP2010235323A JP2012085835A JP 2012085835 A JP2012085835 A JP 2012085835A JP 2010235323 A JP2010235323 A JP 2010235323A JP 2010235323 A JP2010235323 A JP 2010235323A JP 2012085835 A JP2012085835 A JP 2012085835A
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cooling fan
control device
washing machine
washing
protective case
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Wataru Hamaguchi
渉 濱口
Wakichi Takeuchi
和吉 竹内
Hiroyuki Kiriyama
博之 桐山
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Panasonic Corp
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Panasonic Corp
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Abstract

PROBLEM TO BE SOLVED: To reduce the operation sound of a washing machine, thereby achieving the reduction of the noise.SOLUTION: The control device comprises: a controller body 112 for controlling the operation of the washing machine; a protective case 111 for housing the controller body 112, which is flat and has a shallow bottom, as well as a protective cover 113; and a cooling fan 114 capable of circulating air through the protective case or the protective cover as well as switching the number of revolution. During the water-supply process, the agitation process in the washing and rinsing stages as well as the draining process, the cooling fan 114 can reduce the operation sound by switching the number of revolution of the cooling fan to a lower speed, thereby achieving the reduction of the noise caused by the washing machine as well as realizing energy saving.

Description

本発明は、洗濯機の制御装置の温度上昇対策に関するものである。   The present invention relates to measures against temperature rise of a control device for a washing machine.

従来より、機器のインバータ制御等を行う半導体部品には、半導体内部の素子の温度を下げるために放熱板（ヒートシンク）が取り付けられ、更に冷却効果を高めるために、空気循環を強制的に行う冷却ファンを取り付ける事が行われてきた（例えば、特許文献１参照）。   Conventionally, semiconductor parts that perform inverter control of equipment have been fitted with heat sinks (heat sinks) to lower the temperature of elements inside the semiconductor, and cooling that forcibly circulates air to further increase the cooling effect. A fan has been attached (see, for example, Patent Document 1).

図５は、特許文献１に記載された従来の運転制御装置の構成図である。   FIG. 5 is a configuration diagram of a conventional operation control device described in Patent Document 1.

図５において、箱体２２と機械室ベース２１とで構成された容器状空間内部に、圧縮機１１、冷却ファン１２、電力変換部１３、等が配置される。前記電力変換部１３は、発熱の大きい素子（例えばダイオード、トランジスタ等）を集積化したパワー回路ブロック１４と、前記パワー回路ブロック１４の制御をおこなう電力変換制御部１５で構成され、更に前記パワー回路ブロック１４の放熱を促進する為の放熱板（ヒートシンク）１６を有する。   In FIG. 5, a compressor 11, a cooling fan 12, a power conversion unit 13, and the like are disposed inside a container-like space configured by a box body 22 and a machine room base 21. The power conversion unit 13 includes a power circuit block 14 in which elements that generate large amounts of heat (for example, diodes, transistors, and the like) are integrated, and a power conversion control unit 15 that controls the power circuit block 14, and further includes the power circuit. A heat radiating plate (heat sink) 16 for promoting heat radiation of the block 14 is provided.

前記、パワー回路ブロック１４、電力変換制御部１５、放熱板１６は、素子等の発火が他に類焼するのを防ぐ防火壁としての安全性を兼ねる電力変換箱体１７の内部に収納され、かつ電力変換箱体１７は、箱体２２の吸い込み口２３に近接する位置に吸引口１８と、前記冷却ファン１２に近接する位置に吹き出し口１９を形成する。   The power circuit block 14, the power conversion control unit 15, and the heat radiating plate 16 are housed in a power conversion box body 17 that also serves as safety as a fire barrier to prevent other ignition of elements and the like, and The power conversion box 17 forms a suction port 18 at a position close to the suction port 23 of the box 22 and a blowout port 19 at a position close to the cooling fan 12.

冷却ファン１２の回転動作により、図５で点線矢印方向の空気が流れ、圧縮機１１を冷却しつつ電力変換箱体１７内部を流れる空気により放熱板（ヒートシンク）１６を冷却しパワー回路ブロック１４の温度上昇を抑制する。   The rotation of the cooling fan 12 causes air in the direction of the dotted line in FIG. 5 to flow, and while cooling the compressor 11, the air flowing through the power conversion box body 17 is cooled by the heat sink 16 to cool the power circuit block 14. Reduces temperature rise.

上記従来例は、１個の冷却ファン１２により、圧縮機１１と放熱板（ヒートシンク）１６との複数部材の冷却をおこなう例であるが、個々に冷却ファンを構成しても良いし、また、圧縮機１１の無い機器においては風向を逆方向とする場合もある。   The above conventional example is an example of cooling a plurality of members of the compressor 11 and the heat radiating plate (heat sink) 16 with one cooling fan 12, but the cooling fan may be configured individually, In a device without the compressor 11, the wind direction may be reversed.

また、上記例は冷蔵庫の運転制御装置としての記述であるが、電気洗濯機の運転制御装置に於いても同様の冷却構成がなされてきた。   Moreover, although the said example is description as the operation control apparatus of a refrigerator, the same cooling structure has been made | formed also in the operation control apparatus of the electric washing machine.

特開平６−７４６４０号公報JP-A-6-74640

しかしながらこのような従来の構成では、冷却ファンの回転数の設定は、パワー回路ブロックの構成素子であるダイオード、トランジスタ等半導体の最大発熱時を想定して設定されているので、無駄や、冷却ファンの騒音課題があった。   However, in such a conventional configuration, the number of rotations of the cooling fan is set assuming maximum heat generation of semiconductors such as diodes and transistors that are constituent elements of the power circuit block. There were noise issues.

即ち、洗濯機の制御装置の場合では、冷却ファンの回転数の設定は、半導体に流れる電流が増えるすすぎ行程の脱水運転、本脱水行程の脱水運転や乾燥行程を基準にした、大電流時の半導体素子発熱時に対応するものであった。   In other words, in the case of a control device for a washing machine, the number of rotations of the cooling fan is set at the time of a large current based on the dehydration operation of the rinsing process, the dehydration operation of the main dehydration process, and the drying process. This corresponds to the heat generated in the semiconductor element.

しかし、給水、攪拌、排水行程など半導体素子にあまり電流が流れない場合では、発熱温度が低く、上記の冷却ファン回転数は必要が無くオーバースペックの冷却を行い、電気を浪費しているという課題があった。   However, when current does not flow through the semiconductor elements such as water supply, agitation, and drainage process, the heat generation temperature is low, the above cooling fan rotation speed is unnecessary, and overspec cooling is performed, and electricity is wasted. was there.

さらに、脱水行程や、乾燥行程では、機器の高速回転音や、乾燥送風ファンの運転音が高いので、冷却ファンの動作音は気にならないが、運転音が低い給水、攪拌、排水行程では冷却ファンの動作音が機器の動作音よりも大きくなるため、とくに近年の静音化が求められる環境下において、騒音として使用者には煩わしいものとなるという課題もあった。   In addition, in the dehydration process and the drying process, the high-speed rotation sound of the equipment and the operation sound of the drying blower fan are high, so the operation sound of the cooling fan is not anxious, but cooling is performed in the water supply, stirring, and drainage processes where the operation sound is low. Since the operation sound of the fan becomes larger than the operation sound of the device, there is also a problem that it becomes troublesome for the user as noise particularly in an environment in which silence in recent years is required.

本発明は上記課題を解決するもので、洗濯機の制御装置の冷却ファンの運転音を低減し、静音化を図るとともに省エネを実現することを目的としている。   SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to reduce the operation noise of a cooling fan of a control device for a washing machine, to achieve noise reduction and to realize energy saving.

本発明は、上記目的を達成するために、洗濯機の運転を制御するパワー回路ブロックおよび放熱板等を積載した制御装置本体と、前記制御装置本体を内装する保護ケースと、前記保護ケース上面に取り付けられ前記制御装置本体を覆う保護カバーと、前記保護ケースもしくは前記保護カバーに設けられ制御装置内の空気循環を行いかつ回転数の切り替えができる冷却ファンとを備え、洗濯またはすすぎ行程における攪拌行程時の前記冷却ファンの回転数を、すすぎ行程における脱水工程時の前記冷却ファンの回転数、または本脱水行程における脱水工程時の前記冷却ファンの回転数、または乾燥行程時の前記冷却ファンの回転数よりも低くするように設定したものである。   In order to achieve the above object, the present invention provides a control device body loaded with a power circuit block for controlling the operation of a washing machine, a heat sink, and the like, a protective case that houses the control device body, and an upper surface of the protective case. A protective cover that is attached and covers the control device main body, and a cooling fan that is provided in the protective case or the protective cover and that circulates air in the control device and can switch the number of revolutions, and in a washing or rinsing step The rotation speed of the cooling fan during the dehydration process in the rinsing process, the rotation speed of the cooling fan during the dehydration process in the dehydration process, or the rotation of the cooling fan during the drying process It is set to be lower than the number.

これによって、洗濯機の制御素子への負荷の低い攪拌行程では冷却ファンの動作音も低くなり、洗濯機の静音化を図ることが可能となる。   As a result, in the agitation process in which the load on the control element of the washing machine is low, the operation sound of the cooling fan is also reduced, and the washing machine can be quieted.

本発明の洗濯機の制御装置は、洗濯機の静音化と冷却ファンの、省エネの効果を得ることができる。   The control device for a washing machine of the present invention can achieve the energy saving effect of the washing machine and the cooling fan.

本発明の実施の形態におけるドラム式洗濯乾燥機の要部構成を示す断面図Sectional drawing which shows the principal part structure of the drum type washing-drying machine in embodiment of this invention 同ドラム式洗濯乾燥機が備える乾燥機能の構成を示す断面図Sectional drawing which shows the structure of the drying function with which the drum type washing-drying machine is equipped 同ドラム式洗濯乾燥機の制御装置の分解斜視図The exploded perspective view of the control device of the drum type washing and drying machine （Ａ）本発明の実施の形態における各行程での負荷動作状態と運転音の状態図（Ｂ）各行程全てにおいてファン強とした場合の負荷動作状態と運転音の状態図(A) State diagram of load operation state and operation sound in each stroke in the embodiment of the present invention (B) State diagram of load operation state and operation sound when fan strength is used in all strokes 従来の機器の運転制御装置の構成図Configuration diagram of conventional equipment operation control device

第１の発明は、洗濯機の運転を制御するパワー回路ブロックおよび放熱板等を積載した制御装置本体と、前記制御装置本体を内装する保護ケースと、前記保護ケース上面に取り付けられ前記制御装置本体を覆う保護カバーと、前記保護ケースもしくは前記保護カバーに設けられ制御装置内の空気循環を行いかつ回転数の切り替えができる冷却ファンとを備え、洗濯またはすすぎ行程における攪拌行程時の前記冷却ファンの回転数を、すすぎ行程における脱水工程時の前記冷却ファンの回転数、または本脱水行程における脱水工程時の前記冷却ファンの回転数、または乾燥行程時の前記冷却ファンの回転数よりも低くするように設定したことにより、洗濯機の運転音が低い行程、すなわち攪拌行程では冷却ファンの動作音も低くなり、特に攪拌行程は洗濯機一連の動作の中でも動作時間が占める割合が高いため、使用者にとっては洗濯機が静かであることを感じ取れる大きなメリットがあるとともに、冷却ファンの動作電流を低く抑えることができるため、省エネの効果も得ることができる。   A first aspect of the present invention is a control device main body on which a power circuit block for controlling the operation of a washing machine, a heat sink, and the like, a protective case that houses the control device main body, and a control device main body that is attached to the upper surface of the protective case. And a cooling fan that is provided in the protective case or the protective cover and that circulates air in the control device and that can switch the number of revolutions, and that is used for the cooling fan during the agitation process in the washing or rinsing process. The rotational speed is set to be lower than the rotational speed of the cooling fan during the dehydration process in the rinsing process, the rotational speed of the cooling fan during the dehydration process in the main dehydration process, or the rotational speed of the cooling fan during the drying process. The operation noise of the cooling fan is also low in the process where the operation sound of the washing machine is low, that is, the stirring process. As the percentage of operation time in the series of operations of the washing machine is high, there is a great merit for the user that the washing machine can be felt quiet, and the operating current of the cooling fan can be kept low, Energy saving effect can also be obtained.

以下、本発明の実施の形態について図面を参照しながら説明する。また、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

（実施の形態１）
図１は、本発明の実施の形態におけるドラム式洗濯乾燥機の要部構成を示す断面図であり、図２は、同ドラム式洗濯乾燥機が備える乾燥機能の構成を示す断面図である。 (Embodiment 1)
FIG. 1 is a cross-sectional view showing a main part configuration of a drum-type washing / drying machine according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a configuration of a drying function provided in the drum-type washing / drying machine.

図１において、洗濯機筐体３０内には図示しないサスペンション構造によって水槽３１が斜め傾斜した状態に支持され、水槽３１内には有底円筒形に形成され周囲に多数の小孔３３を有する回転ドラム３２が回転自在に支持されている。前記回転ドラム３２は、水槽３１の背面に取り付けられたドラム駆動モータ３４によって回転速度可変及び回転方向切換可能に回転駆動される。   In FIG. 1, a water tank 31 is supported in an obliquely inclined manner by a suspension structure (not shown) in the washing machine housing 30, and the water tank 31 is formed in a bottomed cylindrical shape and has a large number of small holes 33 around it. A drum 32 is rotatably supported. The rotary drum 32 is rotationally driven by a drum drive motor 34 attached to the back surface of the water tank 31 so that the rotational speed can be varied and the rotational direction can be switched.

洗濯機筐体３０の前方上方には、衣類の出し入れを行う開閉自在な蓋体３９、および、使用者が行程選択等の操作を行う操作表示部４０を配置する。   An openable / closable lid 39 for putting clothes in and out, and an operation display unit 40 for a user to select a stroke and the like are arranged in the upper front of the washing machine casing 30.

また、水槽３１上方には、水槽３１内に水を給水するための電磁給水弁３５に配管された給水部３６を接続し、水槽３１下方には、水槽３１内の水を外部に排水するための排水路３７に連なる電磁排水弁３８などが配設される。水槽３１の側周面には乾燥機能としての除湿管路４２を形成する。   In addition, a water supply unit 36 connected to an electromagnetic water supply valve 35 for supplying water into the water tank 31 is connected above the water tank 31, and water in the water tank 31 is drained to the outside below the water tank 31. An electromagnetic drain valve 38 and the like connected to the drain channel 37 are disposed. A dehumidifying conduit 42 as a drying function is formed on the side peripheral surface of the water tank 31.

制御ユニット４１は、水槽３１の前面下部のスペースに立てて配置され、操作表示部４０からの信号に基づいて電磁給水弁３５、ドラム駆動モータ３４、電磁排水弁３８等の駆動により洗濯、すすぎ、脱水、乾燥等の行程制御をおこなう。   The control unit 41 is placed upright in the space below the front surface of the water tank 31, and is washed, rinsed by driving the electromagnetic water supply valve 35, the drum drive motor 34, the electromagnetic drainage valve 38, etc. based on the signal from the operation display unit 40. Process control such as dehydration and drying is performed.

図２の乾燥機能の構成を示す断面図において、乾燥機能の説明をする。   In the cross-sectional view showing the configuration of the drying function in FIG. 2, the drying function will be described.

図２において、回転ドラム３２内部に収容した洗濯物を乾燥する乾燥行程が実施できるように、排気口４７から排気した水槽３１内の空気を除湿管路４２、糸屑回収フィルタ４３、送風管路４４、加熱管路４５を通して送風口４６から再び水槽３２内に除湿して送風する乾燥用空気循環経路が構成されている。   In FIG. 2, the air in the water tank 31 exhausted from the exhaust port 47 is dehumidified through the dehumidifying conduit 42, the yarn waste collecting filter 43, and the air duct so that the drying process of drying the laundry stored in the rotary drum 32 can be performed. 44, a drying air circulation path is formed through the heating pipe 45 to dehumidify and blow air again from the air outlet 46 into the water tank 32.

前記加熱管路４５の内部には、ヒータ４８と送風ファン４９を配し、前記乾燥用空気循環経路を流れる空気を加熱送風し、加熱乾燥した温風を水槽３２内に送給して、内部の衣類の乾燥をする。   Inside the heating pipe line 45, a heater 48 and a blower fan 49 are arranged, the air flowing through the drying air circulation path is heated and blown, and the heated and dried hot air is fed into the water tank 32, Dry your clothes.

省エネのため、乾燥行程の運転時間の短縮させるためには、脱水の回転数を１６００ｒｐｍ程度に上げ、できる限り衣類の水分を取り除いてから以降の乾燥行程に以降することが必要で、この結果、ドラム駆動モータ３４や回転機構の運転音が大きくなり、半導体素子にも多くの電流を流れる事になる。   In order to save energy and to shorten the operation time of the drying process, it is necessary to increase the rotation speed of the dehydration to about 1600 rpm, remove moisture from the clothes as much as possible, and then perform the subsequent drying process. The operation sound of the drum drive motor 34 and the rotation mechanism is increased, and a large amount of current flows through the semiconductor element.

また、乾燥行程は、本脱水行程の脱水後に移るため、しわが付いたまま乾燥が終了することが多く、ドラム式洗濯乾燥機の欠点の一つであるとされているが、この対策として回転ドラム内に送り込む風量を増やし、衣類に当たる風量を増やすことでしわの低減を図るため、送風ファンの回転数としては９０００ｒｐｍ程度まで上げる必要がある。   In addition, since the drying process moves after the dehydration process, the drying process often ends with wrinkles, which is considered to be one of the disadvantages of drum-type laundry dryers. In order to reduce wrinkles by increasing the amount of air sent into the drum and increasing the amount of air striking clothes, the rotational speed of the blower fan needs to be increased to about 9000 rpm.

これにより、乾燥行程も送風ファン４９のモータ音と送風管路４４等を流れる風の音が大きくなり、半導体素子にも多くの電流を流れる事になる。   As a result, during the drying process, the motor sound of the blower fan 49 and the sound of the wind flowing through the blower duct 44 are increased, and a large amount of current flows through the semiconductor element.

図３は、本発明の実施の形態におけるドラム式洗濯乾燥機の制御装置の分解斜視図である。   FIG. 3 is an exploded perspective view of the control device for the drum-type washing and drying machine in the embodiment of the present invention.

図３に示す様に、制御装置４１の、構成素子であるダイオード、トランジスタ等半導体（図示せず）を収容したパワー回路ブロック１２１、および放熱板１２０等を積載した制御装置本体１１２は、浅底で平坦な保護ケース１１１と保護カバー１１３が構成する箱状内方に覆い隠すように収められている。   As shown in FIG. 3, the control device main body 112 loaded with a power circuit block 121 containing a semiconductor (not shown) such as a diode or a transistor as a component of the control device 41, and a heat sink 120, etc. The flat protective case 111 and the protective cover 113 are housed in a box-like inward direction.

前記保護カバー１１３には、冷却ファン１１４により空気を循環するための多数の小径穴１１７と、冷却ファン１１４の取り付けのための穴１１９が設けられ、冷却ファン１１４はブラケット１１５とねじ１１６により保護カバー１１３の穴１１９に固定される。   The protective cover 113 is provided with a large number of small-diameter holes 117 for circulating air by the cooling fan 114 and holes 119 for mounting the cooling fan 114. The cooling fan 114 is protected by a bracket 115 and a screw 116. It is fixed to the hole 119 of 113.

冷却ファン１１４の風向は、制御装置本体１１２に装着した放熱板（ヒートシンク）１２０にその風が当たるように指向している。   The wind direction of the cooling fan 114 is directed so that the wind hits a heat sink (heat sink) 120 attached to the control device main body 112.

また、冷却ファン１１４は、例えばＤＣ（直流）ブラシレスモータを使用し、冷却ファン１１４にはＩＣ（集積回路）を積載した基板を内蔵し（図示せず）、制御装置本体１１２からＤＣ（直流）電源と、回転数の切り替え指示を行う信号線を介して、信号をＨｉｇｈとＬｏｗに切り替えることにより、例えば、高速回転（冷却ファン強）５３００ｒｐｍと、低速回転（冷却ファン弱）３６００ｒｐｍとに切り替え可能に構成する。   Further, the cooling fan 114 uses, for example, a DC (direct current) brushless motor, and the cooling fan 114 has a built-in board (not shown) on which an IC (integrated circuit) is mounted. By switching the signal between High and Low via the power supply and a signal line for instructing the switching of the number of rotations, for example, switching between high-speed rotation (cooling fan strong) 5300 rpm and low-speed rotation (cooling fan weak) 3600 rpm is possible. Configure.

保護ケース１１１は、制御装置本体１１２を収めるため、半田部が近接し、金属では電気的に危険であるため、通常、ＡＢＳなどの樹脂材料が使用されることが多い。よって、保護ケース１１１の外装をさらに不燃性のプレス加工部材の金属ケース１１８で覆い、これら全てが組み合わさったものを制御ユニット４１として構成している。   Since the protective case 111 accommodates the control device main body 112, the solder portions are close to each other, and a metal is electrically dangerous. Therefore, a resin material such as ABS is usually used in many cases. Therefore, the exterior of the protective case 111 is further covered with a metal case 118 of a nonflammable press-worked member, and a combination of all of these is configured as the control unit 41.

制御ユニット４１には、ドラム駆動モータ３４を回転させるパワー系の半導体部品も多数搭載してあり、制御ユニット内は弁当箱のような閉空間になっているため、冷却ファン１１４を使用し、内部の空気循環をすることで半導体素子等の温度が定格内に収まるようにヒートシンク（放熱板）１２０の冷却を行う。   The control unit 41 is equipped with a large number of power semiconductor components that rotate the drum drive motor 34. Since the control unit is a closed space like a lunch box, a cooling fan 114 is used, The heat sink (heat radiating plate) 120 is cooled so that the temperature of the semiconductor element or the like falls within the rating by circulating the air.

以上のように構成された洗濯機の制御装置について、以下その動作、作用を説明する。   About the control apparatus of the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

図４は、本発明の各行程における負荷動作状態と運転音の状態図を示すもので、（Ａ）表は本案を実施した場合で、（Ｂ）表は、本案を実施しない場合の状態を示す。   FIG. 4 shows a state diagram of the load operation state and the driving sound in each process of the present invention. (A) Table shows the case when the present plan is implemented, and (B) Table shows the state when the present plan is not implemented. Show.

図４（Ａ）に示す様に、冷却ファン１１４は、すすぎ行程中の脱水運転、本脱水行程中の脱水運転および乾燥行程においては回転数を、冷却ファン強（５３００ｒｐｍ）に設定し、その他の行程は回転数を、冷却ファン弱（３６００ｒｐｍ）に設定する。   As shown in FIG. 4 (A), the cooling fan 114 is set to a cooling fan strength (5300 rpm) in the dehydration operation during the rinsing process, the dehydration operation during the main dehydration process, and the drying process. In the stroke, the number of revolutions is set to a low cooling fan (3600 rpm).

同表で、ＯＮと表現している欄は、動作していることを意味する。   In the table, the column expressing ON means that it is operating.

本脱水行程では、運転時間の短縮や、次行程の乾燥行程の時間短縮のため、出来るだけ回転ドラム３２の高速回転による脱水効果を高める事が求められるが、制御装置の半導体素子に流れる電流が大きく、温度の上昇を冷却する為に冷却ファン１１４の回転数を強（５３００ｒｐｍ）に設定を行う。また、乾燥行程でも、時間短縮や衣類に当てる風量を大きくして、しわ発生低減のため送風ファン４９の回転数を高めたり、大電流のヒータ４８駆動で半導体素子に流れる電流がおおきくなる。   In this dehydration process, in order to shorten the operation time and the drying process in the next process, it is required to enhance the dehydration effect by the high-speed rotation of the rotary drum 32 as much as possible. However, the current flowing through the semiconductor element of the control device is required. The rotation speed of the cooling fan 114 is set to be strong (5300 rpm) in order to cool the temperature rise. Further, even during the drying process, the time required to flow and the amount of air applied to clothing are increased to increase the rotational speed of the blower fan 49 in order to reduce the generation of wrinkles, and the current flowing through the semiconductor element is increased by driving the heater 48 with a large current.

一方、洗い行程の電磁給水弁３５、洗濯運転やすすぎ運転の低速ドラム駆動モータ３４運転、排水行程の電磁排水弁３８動作では、半導体素子に流れる電流が小さく、温度の上昇が低いので、冷却ファン１１４の弱（３６００ｒｐｍ）回転で対応可能となる。   On the other hand, in the operation of the electromagnetic water supply valve 35 in the washing process, the operation of the low-speed drum drive motor 34 in the washing operation and the rinsing operation, and the operation of the electromagnetic drain valve 38 in the drainage process, the current flowing through the semiconductor element is small and the temperature rise is low. This can be handled with a weak rotation (3600 rpm) of 114.

冷却ファン単品での、冷却ファン強（５３００ｒｐｍ）回転時の運転音は約３５ｄＢあり、制御ユニットに取り付けて、ドラム式洗濯乾燥機内に配置することで、給水、排水行程では約２５ｄＢ、攪拌行程では約３５ｄＢまで大きくなる（Ｂ表参照）。   The operating sound when the cooling fan is strong (5300 rpm) with a single cooling fan is about 35 dB. By attaching it to the control unit and placing it in the drum type washing and drying machine, it is about 25 dB for the water supply and drainage process, and for the stirring process. Increases to about 35 dB (see Table B).

一方、給水や排水行程では、電磁給水弁３５や電磁排水弁３８は無視ができる程度の低騒音レベルであり、この行程で冷却ファン回転数を冷却ファン弱（３６００ｒｐｍ）に設定すると（Ａ）表の２０ｄＢ（デシベル）まで低下する事になる。   On the other hand, in the water supply and drainage strokes, the electromagnetic water supply valve 35 and the electromagnetic drainage valve 38 have low noise levels that can be ignored. If the cooling fan rotation speed is set to a low cooling fan (3600 rpm) in this stroke, the table (A). To 20 dB (decibels).

また、洗いの攪拌行程では、低速ドラム駆動モータ３４運転時の騒音と複合して、（Ｂ）表の約３５ｄＢ（デシベル）から約３２ｄＢ（デシベル）に、その差約３ｄＢ（デシベル）の低減が可能となる。   Also, in the washing agitation process, the difference between the noise of the operation of the low-speed drum drive motor 34 and the noise of about 35 dB (decibels) in Table (B) is reduced to about 32 dB (decibels). It becomes possible.

なお、脱水行程や乾燥行程では、機器本体の発する騒音が、脱水の運転音は約４１ｄＢ（デシベル）で、乾燥行程の運転音は約４２ｄＢ（デシベル）となっており、冷却ファンの回転数の高低には影響されない。   In the dehydration process and the drying process, the noise generated by the device body is about 41 dB (decibel) for the dehydration operation sound, and about 42 dB (decibel) for the drying process. Not affected by height.

本実施例では、冷却ファンの回転数の切り替えを、冷却ファンに内蔵するＩＣに送る信号で行っていたが、ＤＣブラシレスモータの特性により、モータに印加する電圧を変えることでも回転数を変えることができるので、冷却ファンに内蔵するＩＣが無くても、制御装置本体にて電圧変換できる回路を付けることで同様の効果を得ることも可能である。   In this embodiment, the rotation speed of the cooling fan is switched by a signal sent to the IC built in the cooling fan. However, the rotation speed can also be changed by changing the voltage applied to the motor due to the characteristics of the DC brushless motor. Therefore, even if there is no IC built in the cooling fan, it is possible to obtain the same effect by adding a circuit capable of voltage conversion in the control device body.

また、本発明では保護カバー１１３に冷却ファン１１４を取り付けた例を記述したが、洗濯機の構成により保護ケース１１１に冷却ファン１１４を取り付けても同様の効果が得られる。   Moreover, although the example which attached the cooling fan 114 to the protective cover 113 was described in this invention, even if it attaches the cooling fan 114 to the protective case 111 with the structure of a washing machine, the same effect is acquired.

以上のように、本実施の形態においては、給水、攪拌、排水行程等の制御装置の半導体素子を収容するパワー回路ブロックに流れる電流が小さく、かつ、機器の発する騒音が低騒音時には、冷却ファンの回転数を低速回転数に設定したことにより、とくに行程中で運転時間の長い洗濯行程における騒音が低減される事は、使用者にとっては洗濯機が静かである効果を高めている。   As described above, in the present embodiment, when the current flowing through the power circuit block that houses the semiconductor element of the control device such as the water supply, agitation, and drainage process is small and the noise generated by the device is low, the cooling fan By setting the number of rotations to a low number of rotations, the reduction of noise especially in the washing process having a long operation time during the process enhances the effect that the washing machine is quiet for the user.

また、冷却ファンの動作電流を低く抑えることができるため、省エネの効果も得ることができる。   Moreover, since the operating current of the cooling fan can be kept low, an energy saving effect can also be obtained.

以上のように、本発明にかかる洗濯機の制御装置は、機器の運転音が低く、半導体素子を流れる電流が小さい場合は、冷却ファンの回転数を低く設定したもので、動作音も低くなり、省エネの効果も得ることが可能となるので、制御装置にパワー回路を有する機器等の用途に有用である。   As described above, the control device of the washing machine according to the present invention has a low operating noise of the device, and when the current flowing through the semiconductor element is small, the rotation speed of the cooling fan is set low, and the operating noise is also low. Since it is possible to obtain an energy saving effect, it is useful for applications such as equipment having a power circuit in the control device.

１１１ 保護ケース
１１２ 制御装置本体
１１３ 保護カバー
１１４ 冷却ファン
１２０ 放熱板
１２１ パワー回路ブロック DESCRIPTION OF SYMBOLS 111 Protective case 112 Control apparatus main body 113 Protective cover 114 Cooling fan 120 Heat sink 121 Power circuit block

Claims (1)

洗濯機の運転を制御するパワー回路ブロックおよび放熱板等を積載した制御装置本体と、前記制御装置本体を内装する保護ケースと、前記保護ケース上面に取り付けられ前記制御装置本体を覆う保護カバーと、前記保護ケースもしくは前記保護カバーに設けられ制御装置内の空気循環を行いかつ回転数の切り替えができる冷却ファンとを備え、洗濯またはすすぎ行程における攪拌行程時の前記冷却ファンの回転数を、すすぎ行程における脱水工程時の前記冷却ファンの回転数、または本脱水行程における脱水工程時の前記冷却ファンの回転数、または乾燥行程時の前記冷却ファンの回転数よりも低くするように設定した洗濯機の制御装置。 A control device body loaded with a power circuit block and a heat sink for controlling the operation of the washing machine, a protective case that houses the control device body, a protective cover that is attached to the upper surface of the protective case and covers the control device body; A cooling fan provided in the protective case or the protective cover and capable of circulating air in the control device and switching the number of revolutions, and the number of revolutions of the cooling fan during the stirring step in the washing or rinsing step Of the washing machine set to be lower than the number of rotations of the cooling fan at the time of the dehydration process, the number of rotations of the cooling fan at the time of the dehydration process in the main dehydration process, or the number of rotations of the cooling fan at the time of the drying process. Control device.
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JP2019042334A (en) * 2017-09-06 2019-03-22 シャープ株式会社 Washing machine

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JP2016002092A (en) * 2014-06-13 2016-01-12 日立アプライアンス株式会社 Washing machine
JP2019042334A (en) * 2017-09-06 2019-03-22 シャープ株式会社 Washing machine

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