JP2012030003A

JP2012030003A - Drum-type washing machine

Info

Publication number: JP2012030003A
Application number: JP2010174128A
Authority: JP
Inventors: Takeshi Gamo; 健蒲生; Masahiro Kawai; 雅弘河合
Original assignee: Panasonic Corp
Current assignee: Panasonic Corp
Priority date: 2010-08-03
Filing date: 2010-08-03
Publication date: 2012-02-16

Abstract

PROBLEM TO BE SOLVED: To circulate washing water into a drum while heating it without a heater being exposed from the washing water accumulated in a water tank, thereby enhancing the cleaning effect.SOLUTION: The drum-type washing machine comprises: a cylindrical drum 3 with a bottom rotatably provided within a water tank 2; a water supply means 10 for supplying washing water into the water tank 2; a water accumulation part 13 provided in the bottom of the water tank 2; a heater 14 arranged generally parallel to the water surface of the washing water accumulated within the water tank 2; a circulation water path 16 for circulating the washing water within the water tank 2 into the drum 3; a pump 17 provided in the circulation water path 16; a motor 7 for rotationally driving the drum 3; a temperature detection means 15 for detecting the temperature of the water accumulation part 13; and a control means 22 for controlling, e.g., the motor 7. The control means 22 reduces the capacity of the pump 17 when the temperature detected by the temperature detection means 15 exceeds a prescribed value.

Description

本発明は、衣類等の洗濯をおこなうドラム式洗濯機に関するものである。 The present invention relates to a drum type washing machine for washing clothes and the like.

従来、この種のドラム式洗濯機は、洗浄効果を高めるために、洗濯時に洗剤の溶け込んだ水槽内の洗濯水をドラム内に循環させて洗濯物へ降りかけ、洗濯物への洗濯水の浸透を速めることが考えられている。また、水槽の底部にヒータを設けて洗濯水を加熱することが考えられている。また、ドラムの回転軸を前上がりに傾斜させることによって少ない洗濯水で洗濯ができるようにすることが考えられている（例えば、特許文献１参照）。 Conventionally, in order to enhance the cleaning effect, this type of drum-type washing machine circulates the washing water in the water tank in which the detergent is dissolved during the washing in the drum and falls onto the laundry, and the penetration of the washing water into the laundry. It is considered to speed up. It is also considered that a heater is provided at the bottom of the water tank to heat the washing water. In addition, it has been considered that the washing can be performed with a small amount of washing water by tilting the rotating shaft of the drum forwardly upward (see, for example, Patent Document 1).

また、水槽の底部に設けた洗濯水を加熱するヒータを略水平方向に配置し、ヒータが空気中に露出することを防止することが考えられている（例えば、特許文献２参照）。 In addition, it is considered that a heater for heating the washing water provided at the bottom of the water tank is disposed in a substantially horizontal direction to prevent the heater from being exposed to the air (for example, see Patent Document 2).

特開２００７−１１７１３５号公報JP 2007-117135 A 特開２００７−６８８０５号公報JP 2007-68805 A

しかしながら、前記従来の構成では、洗濯時に水槽内に給水された洗濯水をヒータで加熱するとともに、水槽内に溜められた洗濯水をドラム内へ循環させることにより、水槽の底部に溜められる洗濯水の水位が低下し、ヒータが洗濯水の水面から露出して過熱されるという問題があった。そこで、前上がりに傾斜させた水槽の底部に設けたヒータを略水平方向に配設することが考えられているが、水位の低下によってヒータの前部が水面から露出するという問題があった。また、洗濯水の給水量を多くすることによってヒータの露出を防止することが考えられるが、所定の温度に上昇させるまでの所要時間が長くなるという問題あった。 However, in the conventional configuration, the washing water supplied into the water tank at the time of washing is heated by the heater, and the washing water stored in the water tank is circulated into the drum, whereby the washing water stored at the bottom of the water tank is stored. There was a problem that the water level of the heater was lowered and the heater was exposed from the surface of the washing water and overheated. In view of this, it has been considered that the heater provided at the bottom of the water tank inclined upward is arranged in a substantially horizontal direction. However, there is a problem that the front portion of the heater is exposed from the water surface due to a decrease in the water level. Further, it is conceivable to prevent the heater from being exposed by increasing the amount of water supplied to the washing water.

本発明は、前記従来の課題を解決するもので、水槽に溜められた洗濯水からヒータが露出することなく、加熱した洗濯水をドラム内に循環させて、洗浄効果を高めることができるドラム式洗濯機を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and can improve the cleaning effect by circulating heated washing water in the drum without exposing the heater from the washing water stored in the water tank. The purpose is to provide a washing machine.

前記従来の課題を解決するために、本発明のドラム式洗濯機は、水槽内に回転可能に設けた有底筒状のドラムと、前記水槽内に洗濯水を供給する給水手段と、前記水槽内の底部に設けた水溜部と、前記水槽内に溜められる洗濯水の水面と略平行に配設したヒータと、前記水槽内の洗濯水を前記ドラム内へ循環させる循環水路と、前記循環水路に設けたポンプと、前記ドラムを回転駆動させるモータと、前記水溜部の温度を検知する温度検知手段と、前記モータ等を制御する制御手段とを備え、前記制御手段は、前記温度検知手段で検知した温度が所定値を超えると前記ポンプの能力を低下させるようにしたものである。 In order to solve the conventional problems, a drum-type washing machine according to the present invention includes a bottomed cylindrical drum rotatably provided in a water tank, water supply means for supplying wash water into the water tank, and the water tank. A water reservoir provided at the bottom of the water tank, a heater disposed substantially parallel to the surface of the washing water stored in the water tank, a circulation water path for circulating the washing water in the water tank into the drum, and the circulation water path A pump for rotating the drum, temperature detection means for detecting the temperature of the water reservoir, and control means for controlling the motor and the like. The control means is the temperature detection means. When the detected temperature exceeds a predetermined value, the capacity of the pump is reduced.

これによって、水溜部の温度が所定値を超えると水位を上昇させることができ、水槽に溜められた洗濯水からヒータが露出することなく、洗濯水を最適な温度に加熱しながらドラム内に循環させることができる。 As a result, the water level can be raised when the temperature of the water reservoir exceeds a predetermined value, and the laundry water is circulated in the drum while heating the laundry water to an optimum temperature without exposing the heater from the laundry water stored in the water tank. Can be made.

本発明のドラム式洗濯機は、洗濯水を最適な温度に加熱しながらドラム内に循環させて洗浄効果を高めることができる。 The drum type washing machine of the present invention can enhance the cleaning effect by circulating the washing water in the drum while heating the washing water to an optimum temperature.

本発明の実施の形態１におけるドラム式洗濯機の要部断面図Sectional drawing of the principal part of the drum type washing machine in Embodiment 1 of this invention 同ドラム式洗濯機のブロック図Block diagram of the drum type washing machine 同ドラム式洗濯機の動作を示すタイムチャートTime chart showing the operation of the drum type washing machine 同ドラム式洗濯機の他の例の動作を示すタイムチャートTime chart showing the operation of another example of the drum type washing machine 本発明の実施の形態２におけるドラム式洗濯機の動作を示すタイムチャートTime chart showing operation of drum type washing machine in embodiment 2 of the present invention 本発明の実施の形態３におけるドラム式洗濯機の要部断面図Sectional drawing of the principal part of the drum-type washing machine in Embodiment 3 of this invention. 同ドラム式洗濯機の要部断面図Cross section of the main part of the drum type washing machine

第１の発明は、筐体内に前上がりに傾斜させて弾性支持した水槽と、前記水槽内に回転可能に設けた有底筒状のドラムと、前記水槽内に洗濯水を供給する給水手段と、前記水槽内の底部に設けた水溜部と、前記水槽内に溜められる洗濯水の水面と略平行に配設したヒータと、前記水槽内の洗濯水を前記ドラム内へ循環させる循環水路と、前記循環水路に設けたポンプと、前記ドラムを回転駆動させるモータと、前記水溜部の温度を検知する温度検知手段と、前記モータ等を制御する制御手段とを備え、前記制御手段は、前記温度検知手段で検知した温度が所定値を超えると前記ポンプの能力を低下させるようにしたことにより、水溜部の温度が所定値を超えるとポンプの能力、すなわち、回転数を低下させることによって洗濯水の循環量を少なくすることができる。したがって、水溜部に溜まる洗濯水の水位を上昇させることができるようになり、ヒータが洗濯水の水面から露出することなく洗濯水に放熱可能な状態を保持し、洗濯水を最適な温度に加熱しながらドラム内に循環させることができる。 The first invention comprises a water tank elastically supported by inclining forward in the housing, a bottomed cylindrical drum rotatably provided in the water tank, and a water supply means for supplying washing water into the water tank. A water reservoir provided at the bottom of the aquarium, a heater disposed substantially parallel to the surface of the washing water stored in the aquarium, a circulation channel for circulating the washing water in the aquarium into the drum, A pump provided in the circulation channel, a motor for rotating the drum, temperature detecting means for detecting the temperature of the water reservoir, and control means for controlling the motor and the like, wherein the control means includes the temperature When the temperature detected by the detecting means exceeds a predetermined value, the capacity of the pump is reduced. When the temperature of the water reservoir exceeds the predetermined value, the capacity of the pump, that is, the rotational speed is decreased to reduce the washing water. Less circulation Can Kusuru. Accordingly, the water level of the washing water accumulated in the water reservoir can be raised, and the heater keeps the heat dissipated to the washing water without being exposed from the surface of the washing water, and the washing water is heated to the optimum temperature. While circulating in the drum.

第２の発明は、特に、第１の発明の制御手段は、温度検知手段で検知した温度が所定値を超えるとポンプを停止するようにしたことにより、水溜部に溜まる洗濯水の水位の上昇を速めることができる。 In the second invention, in particular, the control means according to the first invention stops the pump when the temperature detected by the temperature detecting means exceeds a predetermined value, so that the level of the washing water accumulated in the water reservoir is increased. Can speed up.

第３の発明は、特に、第１または第２の発明の制御手段は、温度検知手段で検知した温度が設定値に低下すると、ポンプの能力を上昇させるようにしたことにより、ヒータの熱を洗濯水に放熱可能な状態を保持して、ドラム内への洗濯水の循環量を多くすることができる。 In the third aspect of the invention, in particular, the control means of the first or second aspect of the invention increases the capacity of the pump when the temperature detected by the temperature detection means decreases to a set value, thereby increasing the heat of the heater. It is possible to increase the circulation amount of the wash water into the drum while maintaining the heat dissipation state in the wash water.

第４の発明は、特に、第１〜第３のいずれか１つの発明の温度検知手段を水溜部内のヒータ近傍に配設したことにより、ヒータが洗濯水からの露出した場合の温度上昇を迅速に検知することができ、水溜部の過熱を安全に防止することができる。 In the fourth aspect of the invention, in particular, the temperature detection means of any one of the first to third aspects is arranged in the vicinity of the heater in the water reservoir, so that the temperature rise when the heater is exposed from the washing water can be accelerated. Therefore, overheating of the water reservoir can be safely prevented.

第５の発明は、特に、第１〜第４のいずれか１つの発明の循環水路は、洗濯水の吸い込み部を少なくともヒータの一部が水溜部に溜められる洗濯水に浸かるように配設したことにより、水溜部の水位が低下した場合に、ヒータが中空に露出することがなく、ヒータの熱を洗濯水に放熱可能な状態を保持することができる。 In the fifth aspect of the invention, in particular, the circulating water channel of any one of the first to fourth aspects of the invention is arranged such that the washing water suction portion is immersed in the washing water in which at least a part of the heater is stored in the water reservoir. Thus, when the water level of the water reservoir is lowered, the heater is not exposed to the hollow, and the state in which the heat of the heater can be radiated to the washing water can be maintained.

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。なお、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. Note that the present invention is not limited to the embodiments.

（実施の形態１）
図１は、本発明の実施の形態１におけるドラム式洗濯機の要部断面図、図２は同ドラム式洗濯機のブロック図、図３は同ドラム式洗濯機の動作を示すタイムチャートである。 (Embodiment 1)
1 is a cross-sectional view of a main part of a drum type washing machine according to Embodiment 1 of the present invention, FIG. 2 is a block diagram of the drum type washing machine, and FIG. 3 is a time chart showing the operation of the drum type washing machine. .

図１〜図３において、１はドラム式洗濯機の筐体で、その内部には洗濯水を溜める水槽２を前上がりに傾斜させた状態に配設されており、吊り下げばね（図示せず）およびダンパー（図示せず）によって弾性支持している。水槽２内には洗濯物を収容する有底円筒状のドラム３が回転可能に設けられている。ドラム３の周側壁面には、複数のバッフル４と、水槽２内と連通する多数の小孔５が設けられ、前面側には洗濯物を出し入れする開口部６が設けられている。 In FIG. 1 to FIG. 3, reference numeral 1 denotes a drum-type washing machine housing, in which a water tank 2 for storing washing water is disposed so as to be inclined forward and a suspension spring (not shown). ) And a damper (not shown). A bottomed cylindrical drum 3 for storing laundry is rotatably provided in the water tank 2. A plurality of baffles 4 and a plurality of small holes 5 communicating with the inside of the water tub 2 are provided on the peripheral side wall surface of the drum 3, and an opening 6 for taking in and out the laundry is provided on the front side.

７はドラム３を回転駆動するモータで、水槽２の外周下部に固定され、ベルト８およびプーリー９を介して回転ドラム３を回転させる構成となっている。１０は水槽２内に洗濯水を供給する給水手段としての給水弁で、給水路１１中に設けた洗剤を投入する洗剤ケース１２を介して水槽２内に洗濯水が供給される。 A motor 7 rotationally drives the drum 3 and is fixed to the lower part of the outer periphery of the water tank 2 and is configured to rotate the rotating drum 3 via a belt 8 and a pulley 9. Reference numeral 10 denotes a water supply valve as a water supply means for supplying washing water into the water tank 2, and the washing water is supplied into the water tank 2 through a detergent case 12 into which a detergent provided in the water supply channel 11 is introduced.

水槽２内の底部には洗濯水を溜める水溜部１３が設けられている。この水溜部１３内に水槽２内に溜められる洗濯水の水面と略平行にヒータ１４が配設され、水溜部１３に溜められた洗濯水を洗濯に適した所定の温度（例えば、３０〜４０℃）に加熱することができる。水溜部１３の温度はサーミスタ等の温度検知手段１５によって検知する。 A water reservoir 13 for storing washing water is provided at the bottom of the water tank 2. A heater 14 is disposed in the water reservoir 13 substantially parallel to the surface of the washing water stored in the water tub 2, and the washing water stored in the water reservoir 13 has a predetermined temperature suitable for washing (for example, 30 to 40). ° C). The temperature of the water reservoir 13 is detected by temperature detection means 15 such as a thermistor.

水槽２内の水溜部１３に溜められた洗濯水は、循環水路１６に設けたポンプ１７によってドラム３内へ循環させることができる。水溜部１３の底部に循環水路１６と連通した洗濯水を吸い込む吸い込み部１８を設け、ドラム３の前面側に設けた開口部６の上部に、ドラム３内に向けて洗濯水が吐出されるように吐出部１９を設けている。 Washing water stored in the water reservoir 13 in the water tank 2 can be circulated into the drum 3 by a pump 17 provided in the circulation water channel 16. A suction part 18 for sucking washing water communicating with the circulation water channel 16 is provided at the bottom of the water reservoir 13 so that the washing water is discharged toward the inside of the drum 3 at the upper part of the opening 6 provided on the front side of the drum 3. The discharge part 19 is provided in the.

循環水路１６にはポンプ１７の下流側に切換弁２０が設けてあり、吐出部１９に通じる循環水路１６と、洗濯水を機外へ排出する排水路２１のいずれかに選択的に切換えることができる。洗濯およびすすぎ時は、水溜部１３内の洗濯水を循環水路１６を通して吐出部１９からドラム２内の洗濯物に向けて吐出することができ、洗濯およびすすぎ後の洗濯水を排水路２１を通して機外へ排出することができる。 A switching valve 20 is provided in the circulating water channel 16 on the downstream side of the pump 17 and can be selectively switched to either the circulating water channel 16 leading to the discharge unit 19 or the drainage channel 21 for discharging the wash water to the outside of the machine. it can. At the time of washing and rinsing, the wash water in the water reservoir 13 can be discharged from the discharge portion 19 toward the laundry in the drum 2 through the circulation water passage 16, and the wash water after washing and rinsing can be discharged through the drain passage 21. It can be discharged outside.

２２は筐体１内に設けられた制御手段で、モータ７、給水弁１０、ヒータ１４、ポンプ１７、切換弁２０等を駆動し、洗濯、すすぎ、脱水の各工程を逐次制御する。 Reference numeral 22 denotes control means provided in the housing 1, which drives the motor 7, the water supply valve 10, the heater 14, the pump 17, the switching valve 20, and the like, and sequentially controls each of the washing, rinsing and dehydration processes.

以上のように構成されたドラム式洗濯機について、以下その動作、作用を説明する。筐体１の前面側に開閉自在に設けた扉２３を開いて開口部６からドラム３内に洗濯物を投入し、操作部２４の電源スイッチ（図示せず）をオンし、スタートスイッチ（図示せず）を操作して運転を開始すると、布量検知手段２５によって投入された洗濯物の量が検知され、給水弁１０が動作して給水が開始される。 About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. Open the door 23 that can be opened and closed on the front side of the housing 1, put the laundry into the drum 3 from the opening 6, turn on the power switch (not shown) of the operation unit 24, and start switch (FIG. When the operation is started by operating (not shown), the amount of laundry put in is detected by the cloth amount detecting means 25, and the water supply valve 10 is operated to start water supply.

水量は投入される布量に応じてあらかじめ設定されており、洗剤ケース１２内に投入された洗剤とともに水槽２内に洗濯水が給水される。水位検知手段２６により設定量の洗濯水が給水されたことを検知すると給水を停止し、モータ７を駆動する。 The amount of water is set in advance according to the amount of cloth to be fed, and the washing water is supplied into the water tank 2 together with the detergent put into the detergent case 12. When the water level detecting means 26 detects that a set amount of washing water has been supplied, the water supply is stopped and the motor 7 is driven.

洗濯行程では、モータ７によってドラム３を正逆回転駆動し、ドラム３内の洗濯物はバッフル４によって持ち上げられ、ドラム３内の上方から水面上に落下させてたたき洗いが行われる。給水された洗濯水の温度が低いときはヒータ１４に通電し、水溜部１３の洗濯水を洗濯に適した温度に加熱する。温水洗浄時の洗濯水の加熱温度は、一般的には３０〜４０℃であり、給水時の温度が例えば１０℃以下の低温時に加熱すると洗浄効果を高める上で効果的である。 In the washing process, the drum 3 is driven to rotate in the forward and reverse directions by the motor 7, the laundry in the drum 3 is lifted by the baffle 4, and dropped on the water surface from the inside of the drum 3 to be washed. When the temperature of the supplied wash water is low, the heater 14 is energized to heat the wash water in the water reservoir 13 to a temperature suitable for washing. The heating temperature of washing water at the time of warm water washing is generally 30 to 40 ° C., and heating at a low temperature of, for example, 10 ° C. or less is effective in enhancing the washing effect.

水槽２の底部に溜められた洗濯水はヒータ１４によって加熱され、図３に示すように、
水溜部１３の温度はその外底部に設けた温度検知手段１５によって検知し、制御手段２２によって洗濯水があらかじめ設定された温度になるように制御される。制御手段２２は、切換弁２０を循環水路１６側に切換えるとともに、ポンプ１７はあらかじめ設定された回転数で駆動し、所定量の洗濯水をドラム３内に循環させて、ドラム３内で撹拌されている洗濯物に洗濯水を浸透させることができる。 The washing water stored at the bottom of the aquarium 2 is heated by the heater 14, as shown in FIG.
The temperature of the water reservoir 13 is detected by the temperature detector 15 provided on the outer bottom thereof, and is controlled by the controller 22 so that the washing water has a preset temperature. The control means 22 switches the switching valve 20 to the circulating water channel 16 side, and the pump 17 is driven at a preset rotational speed to circulate a predetermined amount of washing water in the drum 3 and is agitated in the drum 3. Washing water can penetrate into the laundry.

水溜部１３で加熱された温水を吐出部１９から吐出して洗濯物に迅速に浸透させることにより、洗剤の溶解を促進させるとともに、衣類から汚れを分離する作用を強めて洗浄効果を高めることができる。 The hot water heated in the water reservoir 13 is discharged from the discharge unit 19 and rapidly penetrates into the laundry, thereby promoting dissolution of the detergent and enhancing the cleaning effect by enhancing the action of separating dirt from clothing. it can.

ポンプ１７により水溜部１３内の洗濯水をドラム３内へ循環させることによって、水槽２内の水位が低下する。温度検知手段１５によって検知した水溜部１３の温度が所定温度（例えば、７０℃）を超えると、ポンプ１７の回転数を減少させて洗濯水を循環させる能力を低下させるようにしている。 By circulating the wash water in the water reservoir 13 into the drum 3 by the pump 17, the water level in the water tank 2 is lowered. When the temperature of the water reservoir 13 detected by the temperature detector 15 exceeds a predetermined temperature (for example, 70 ° C.), the rotation speed of the pump 17 is decreased to reduce the ability to circulate the washing water.

これにより、洗濯水の循環量が減少し、水槽２内の水位を上昇させることができる。水位が上昇すると水溜部１３の温度が低下し、時間Ｔ１後に再び設定された温度に制御される。ヒータ１４は上昇した洗濯水に水没し制御手段２２によって安定的に設定温度が維持される。したがって、ヒータ１４は洗濯水の水面から露出することなく洗濯水に放熱可能な状態を保持し、洗濯水を最適な温度に加熱しながらドラム３内に循環させることができる。 Thereby, the circulation amount of washing water decreases and the water level in the water tank 2 can be raised. When the water level rises, the temperature of the water reservoir 13 decreases, and the temperature is controlled again after the time T1. The heater 14 is submerged in the raised washing water, and the set temperature is stably maintained by the control means 22. Therefore, the heater 14 can maintain a state in which heat can be radiated to the washing water without being exposed from the surface of the washing water, and can circulate the washing water in the drum 3 while heating the washing water to an optimum temperature.

図４は、他の例を示したもので、温度検知手段１５で検知した温度が所定値を超えるとポンプ１７の動作を停止するようにしている。これにより、洗濯水の循環が止まり、水溜部１３に溜まる洗濯水の水位を急速に上昇させることができ、時間Ｔ１より短い時間Ｔ２後に再び設定された温度に制御される。 FIG. 4 shows another example. When the temperature detected by the temperature detecting means 15 exceeds a predetermined value, the operation of the pump 17 is stopped. As a result, the circulation of the washing water is stopped, and the water level of the washing water accumulated in the water reservoir 13 can be rapidly raised, and the temperature is controlled again after a time T2 shorter than the time T1.

所定の洗濯工程が終わると切換弁２０を排水路２１側に切換えてポンプ１７を駆動すると、水槽２内の洗濯水は切換弁２０を通して排水路２１から機外へ排出される。ポンプ１７は、洗濯水のドラム３内への循環時と排水時に駆動し、循環兼排水ポンプとして機能する。 When the predetermined washing process is finished, when the switching valve 20 is switched to the drainage channel 21 side and the pump 17 is driven, the washing water in the water tank 2 is discharged from the drainage channel 21 through the switching valve 20 to the outside of the machine. The pump 17 is driven during circulation and drainage into the washing water drum 3 and functions as a circulation / drainage pump.

洗濯工程に続いて実行されるすすぎ行程においても同様に、排水後に給水弁１０が開いて給水が開始され、水槽２内に所定量のすすぎ水が給水される。水位検知手段２６によって所定の水位を検知すると給水を停止し、モータ７が駆動する。すすぎ行程では、洗濯行程と同様に、ドラム３はモータ７によって正逆回転駆動され、ドラム３内の洗濯物は持ち上げられて水面上に落下される。 Similarly, in the rinsing process executed following the washing process, the water supply valve 10 is opened after draining to start water supply, and a predetermined amount of rinse water is supplied into the water tank 2. When a predetermined water level is detected by the water level detection means 26, water supply is stopped and the motor 7 is driven. In the rinsing process, similarly to the washing process, the drum 3 is driven to rotate forward and backward by the motor 7, and the laundry in the drum 3 is lifted and dropped onto the water surface.

このとき、水槽２の底部に設けたヒータ１４に通電し、水槽２内のすすぎ水を加熱してすすぎを行うことが可能である。このため、すすぎ行程においても、切換弁２０を循環水路１６側に切換えてポンプ１７を動作させることにより、すすぎ水をドラム３内に循環させ、洗剤成分や残った汚れを早く衣類から離脱させ、すすぎ効果を高めることができる。 At this time, the heater 14 provided at the bottom of the water tank 2 is energized, and the rinse water in the water tank 2 can be heated and rinsed. For this reason, also in the rinsing process, by switching the switching valve 20 to the circulation water channel 16 side and operating the pump 17, the rinsing water is circulated in the drum 3, and the detergent component and the remaining dirt are quickly separated from the clothing, The rinsing effect can be enhanced.

（実施の形態２）
図５は、本発明の実施の形態２におけるドラム式洗濯機の動作を示すタイムチャートである。本実施の形態の特徴は、温度検知手段１５で検知した温度が設定値に低下すると、ポンプ１７の能力を上昇させるようにしている。他の構成は実施の形態１と同じであり、同一の構成に同一の符号を付して、詳細な説明は実施の形態１のものを援用する。 (Embodiment 2)
FIG. 5 is a time chart showing the operation of the drum type washing machine in the second embodiment of the present invention. The feature of the present embodiment is that the capacity of the pump 17 is increased when the temperature detected by the temperature detecting means 15 falls to a set value. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

上記の構成によれば、温度検知手段１５により水溜部１３の温度が設定値に制御されて
いる状態を検知すると、ポンプ１７の能力を上昇させ、ヒータ１４の熱を洗濯水に放熱可能な状態を保持して、ドラム３内への洗濯水の循環量を多くすることができる。 According to the above configuration, when detecting the state in which the temperature of the water reservoir 13 is controlled to the set value by the temperature detecting means 15, the capacity of the pump 17 is increased and the heat of the heater 14 can be dissipated to the washing water. And the circulation amount of the washing water into the drum 3 can be increased.

（実施の形態３）
図６および図７は、本発明の実施の形態３におけるドラム式洗濯機の要部断面図である。本実施の形態の特徴は、循環水路１６に洗濯水を吸い込む吸い込み部１８を、少なくともヒータ１４の一部（下部）が水溜部１３に溜められる洗濯水に浸かるように形成している。また、温度検知手段１５を水溜部１３内のヒータ１４の近傍（上方）に配設し、洗濯水の水面からヒータ１４の上部が露出すると、ヒータ１４の温度上昇を迅速に検知することができ、水溜部１３の過熱を安全に防止することができる。 (Embodiment 3)
6 and 7 are cross-sectional views of main parts of the drum-type washing machine according to Embodiment 3 of the present invention. The feature of the present embodiment is that the suction part 18 for sucking the washing water into the circulation water channel 16 is formed so that at least a part (lower part) of the heater 14 is immersed in the washing water stored in the water reservoir 13. Further, when the temperature detecting means 15 is disposed in the vicinity (upper side) of the heater 14 in the water reservoir 13 and the upper portion of the heater 14 is exposed from the water surface of the washing water, the temperature rise of the heater 14 can be detected quickly. The overheating of the water reservoir 13 can be safely prevented.

また、循環水路１６に開閉弁２７を設けるとともに、排水路２１に開閉弁２８を設けている。洗濯およびすすぎ時に洗濯水をドラム３内へ循環させるときは、開閉弁２７を開いて開閉弁２８を閉じる。そして、洗濯およびすすぎ後の排水時は、開閉弁２７を閉じて開閉弁２８を開く。ポンプ１７は実施の形態１と同様に循環排水兼用である。 In addition, an opening / closing valve 27 is provided in the circulation channel 16, and an opening / closing valve 28 is provided in the drainage channel 21. When circulating wash water into the drum 3 during washing and rinsing, the on-off valve 27 is opened and the on-off valve 28 is closed. When draining after washing and rinsing, the on-off valve 27 is closed and the on-off valve 28 is opened. The pump 17 is also used for circulating drainage as in the first embodiment.

洗濯水の循環により水槽２内の洗濯水の水位が低下すると、線イで水位の低下が停止するように吸い込み部１８の位置が設定されている。ヒータ１４は水溜部１３内に溜められる洗濯水の水面と略平行に配設しているため、線イの下方は洗濯水に浸かった状態にすることができる。 When the water level of the washing water in the water tank 2 decreases due to the circulation of the washing water, the position of the suction portion 18 is set so that the decrease in the water level stops at line i. Since the heater 14 is disposed substantially parallel to the surface of the washing water stored in the water reservoir 13, the lower part of the line A can be immersed in the washing water.

上記の構成により、水溜部１３の水位が低下した場合でも、吸い込み部１８が水面上に露出し、少なくともヒータ１４の一部が水溜部１３に溜められた洗濯水に浸かる位置で水位の低下を停止することができるので、ヒータ１４が中空に露出することがなく、ヒータ１４の熱を洗濯水に放熱可能な状態を保持して、水溜部１３の過熱を安全に防止することができる。 With the above configuration, even when the water level of the water reservoir 13 is lowered, the suction portion 18 is exposed on the water surface, and at least a part of the heater 14 is lowered at a position where it is immersed in the wash water stored in the water reservoir 13. Since the heater 14 can be stopped, the heater 14 is not exposed to the hollow, and the state in which the heat of the heater 14 can be dissipated to the washing water can be maintained, and overheating of the water reservoir 13 can be safely prevented.

このとき、ヒータ１４の下部が洗濯水に浸かった状態で上部が水面上に露出すると、洗濯水に放熱しながらヒータ１４の上方近傍に設けた温度検知手段１５によって、ヒータ１４の温度上昇を検知することができ、水位を迅速かつ安全に上昇させることができる。 At this time, when the lower part of the heater 14 is immersed in the washing water and the upper part is exposed on the water surface, the temperature detecting means 15 provided near the upper part of the heater 14 detects the temperature rise of the heater 14 while radiating heat to the washing water. The water level can be raised quickly and safely.

なお、本発明の実施の形態は、他の実施の形態またはその一部と組み合わせて実施することができる。 Note that the embodiment of the present invention can be implemented in combination with another embodiment or a part thereof.

以上のように、本発明にかかるドラム式洗濯機は、洗濯水を最適な温度に加熱しながらドラム内に循環させて洗浄効果を高めることができるので、ドラム式洗濯機として有用である。 As described above, the drum type washing machine according to the present invention is useful as a drum type washing machine because the washing water can be circulated in the drum while being heated to an optimum temperature to enhance the washing effect.

１筐体
２水槽
３ドラム
７モータ
１０給水弁（給水手段）
１３水溜部
１４ヒータ
１５温度検知手段
１６循環水路
１７ポンプ
２２制御手段 DESCRIPTION OF SYMBOLS 1 Case 2 Water tank 3 Drum 7 Motor 10 Water supply valve (water supply means)
DESCRIPTION OF SYMBOLS 13 Water reservoir part 14 Heater 15 Temperature detection means 16 Circulating water path 17 Pump 22 Control means

Claims

筐体内に前上がりに傾斜させて弾性支持した水槽と、前記水槽内に回転可能に設けた有底筒状のドラムと、前記水槽内に洗濯水を供給する給水手段と、前記水槽内の底部に設けた水溜部と、前記水槽内に溜められる洗濯水の水面と略平行に配設したヒータと、前記水槽内の洗濯水を前記ドラム内へ循環させる循環水路と、前記循環水路に設けたポンプと、前記ドラムを回転駆動させるモータと、前記水溜部の温度を検知する温度検知手段と、前記モータ等を制御する制御手段とを備え、前記制御手段は、前記温度検知手段で検知した温度が所定値を超えると前記ポンプの能力を低下させるようにしたドラム式洗濯機。 A water tank that is elastically supported by tilting upward in the housing, a bottomed cylindrical drum that is rotatably provided in the water tank, a water supply means for supplying washing water into the water tank, and a bottom portion in the water tank A water reservoir provided in the water tank, a heater disposed substantially parallel to the surface of the wash water stored in the water tank, a circulation water path for circulating the wash water in the water tank into the drum, and the circulation water path. A pump, a motor for rotationally driving the drum, temperature detection means for detecting the temperature of the water reservoir, and control means for controlling the motor and the like, the control means being a temperature detected by the temperature detection means A drum type washing machine in which the capacity of the pump is reduced when the value exceeds a predetermined value.

制御手段は、温度検知手段で検知した温度が所定値を超えるとポンプを停止するようにした請求項１記載のドラム式洗濯機。 2. The drum type washing machine according to claim 1, wherein the control means stops the pump when the temperature detected by the temperature detection means exceeds a predetermined value.

制御手段は、温度検知手段で検知した温度が設定値に低下すると、ポンプの能力を上昇させるようにした請求項１または２記載のドラム式洗濯機。 The drum type washing machine according to claim 1 or 2, wherein the control means increases the capacity of the pump when the temperature detected by the temperature detection means falls to a set value.

温度検知手段を水溜部内のヒータ近傍に配設した請求項１〜３のいずれか１項に記載のドラム式洗濯機。 The drum type washing machine according to any one of claims 1 to 3, wherein the temperature detection means is disposed in the vicinity of the heater in the water reservoir.

循環水路は、洗濯水の吸い込み部を少なくともヒータの一部が水溜部に溜められる洗濯水に浸かるように配設した請求項１〜４のいずれか１項に記載のドラム式洗濯機。 The drum-type washing machine according to any one of claims 1 to 4, wherein the circulation water channel is disposed so that the washing water suction portion is immersed in washing water in which at least a part of the heater is stored in the water reservoir.