CN201095696Y

CN201095696Y - Drum washing machine

Info

Publication number: CN201095696Y
Application number: CNU2007201403927U
Authority: CN
Inventors: 井田治夫; 高桥武人
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2006-08-31
Filing date: 2007-06-12
Publication date: 2008-08-06
Anticipated expiration: 2017-06-12
Also published as: CN101135096A; JP2008054912A; CN101135096B

Abstract

The utility model provides a washing machine, which consists of a rotary drum for containing washings; and an electric motor for revolving the rotary drum and a drive unit for driving the electric motor. The driving unit provides direct current for the electric motor to drive the electric motor during the washing operation and provides alternating current for the electric motor to drive the electric motor during the dewatering operation. The washing machine can inhibit the electric motor from rising in temperature and prolong the service life of the electric motor.

Description

Tumbling-box washing machine

Technical field

The utility model relates to tumbling-box washing machine.

Background technology

In existing tumbling-box washing machine, microcomputer reads the rotating speed of motor according to the output that is installed in the tachometer (tachogenerator) on the motor, rotating speed that calculating is read and rotating speed of target poor, determine the triggering angle of bidirectional triode thyristor (triac) (twocouese IGCT), utilize phase controlling that necessary voltage is provided, and supply motor, thereby the rotating speed of control motor.

Open in the flat 7-303787 communique the spy, the alternating current original state of bidirectional triode thyristor output is supplied with motor.Can realize by simple structure with the mode of alternating current drive motor, but because the counter electromotive force that the sense of current during the washing running produces when switching, the efficient during Motor Control is poor.Thereby the temperature of motor obviously rises, so have to use large-scale motor.

Open in the flat 8-309077 communique the spy, the alternating current utilization that bidirectional triode thyristor is exported converts DC current to by the rectification circuit that diode bridge (diode bridge) forms, and this DC current is supplied with motor.Can use the free-wheel diode (flywheel diode) that discharges counter electromotive force with the mode of dc drive motor, and drive motor effectively, the temperature that reduces motor rises.But, because the sense of current that flows through the carbon brush of motor do not change, so for example when dehydration, under the situation that motor rotates at a high speed along a direction, because the brush of motor has polarity, so the only brush of side wearing and tearing.Because when dehydration, the wear extent of brush was very big, during for washing ten times of wear extent, so if a lateral wearing only during dehydration then can bring very big influence to the life-span of motor.And, utilize the driving of DC current when dehydration, can produce bigger electric wave noise.

The utility model content

Washing machine of the present utility model possesses: the cylinder of taking in washings; Make the motor of cylinder rotation; The drive division of drive motor.Drive division is supplied with DC current to motor and is come drive motor when the washing running, supply with alternating current to motor and come drive motor when the dehydration running.

In this washing machine, the temperature that can suppress motor rises, and prolongs the life-span of motor.

Description of drawings

Figure 1A is the cutaway view of the tumbling-box washing machine in the embodiment 1 of the present utility model.

Figure 1B is the circuit diagram of the tumbling-box washing machine in the embodiment 1.

The circuit diagram of the tumbling-box washing machine when Fig. 2 is dehydration in the embodiment 1.

Fig. 3 represents the rotary speed of the cylinder of the tumbling-box washing machine in the embodiment 1.

The specific embodiment

Figure 1A is the cutaway view of the tumbling-box washing machine 1001 in the embodiment 1 of the present utility model.Figure 1B is the circuit diagram of tumbling-box washing machine 1001.

Tumbling-box washing machine 1001 possesses: the framework 52 with door 51; Be housed in the cylinder 53 in the framework 52; In cylinder 53, supply with the feedwater portion 57 of water; Drainage Division 58 from cylinder 53 discharge waters; Make the motor 20 of cylinder 53 rotations; The drive division 61 of drive motor 20.Pulley 55,56 is individually fixed in cylinder 53, motor 20.Frame is with 54 between pulley 55,56.Clothes as washings is housed in the cylinder 53 by door 51.Motor 20 utilizes the electric current rotation of supplying with from drive division 61, via pulley 56, be with 54 and pulley 55 make cylinder 53 rotations, thereby the washing washings.

Figure 1B is the circuit diagram of the drive division 61 of tumbling-box washing machine 1001.

Motor 20 has stator and rotor.Motor 20 possesses: be wrapped in the high-speed side winding 1 on the stator; Be connected in series with high-speed side winding 1 and be wrapped in low speed side winding 2 on the stator; Be wrapped in epitrochanterian rotor winding 3.

Diode bridge 18 is formed by four diode 18A and free-wheel diode 17.Free-wheel diode 17 discharges the electric current by the counter electromotive force generation of motor 20, thereby motor 20 is rotated smoothly, and reduces the electric power of supplying with to motor 20, suppresses temperature and rises.

Control part 62 detects the rotating speed of motor 20, determines to trigger the angle according to its rotating speed, and bidirectional triode thyristor (twocouese IGCT) 6 conductings are triggered the angle to this.Bidirectional triode thyristor 6 will only trigger angle motor 20 with this from the alternating current that AC power 21 is supplied with and supply with.The electric current that power supply relay 7 opens and closes from AC power 21.AC/DC

transfer relay

8,11 switches with the high-speed side winding 1 of alternating current action and the low speed side winding 2 that moves with DC current with a pair of action.

Direction of

rotation transfer relay

9,10 can change the direction of rotation of motor 20 with a pair of action.Direction of rotation transfer relay 10, rotor winding 3 and direction of rotation transfer relay 9 are connected in series.

AC/DC transfer relay 12 moves linkedly with the starting switch that washing begins usefulness, motor 20 rotations when preventing to connect power supply.Noise prevents that

coil

4,5 is connected in series with AC/

DC transfer relay

8,11 respectively, prevents that AC/

DC transfer relay

8,11 from producing noise.Noise preventer 13～16 is made of with the capacitor that is connected with this resistor in series resistor, prevents that bidirectional triode thyristor 6 or

relay

7,8,10,11,12 from producing noise.

AC power 21 has output 21A, the 21B of output AC electric current.Diode bridge 18 is come in and gone out input AC and is held the alternating current rectification of 18E, 18F, and from

dc output end

18C, 18D output DC stream.The dc output end 18C of diode bridge 18 is than dc output end 18D current potential height.

Action to tumbling-box washing machine 1001 describes.Fig. 3 represent tumbling-box washing machine 1001 from washing to the rotary speed of the cylinder 53 that dewaters.Drive division 61 drive motors 20 can make cylinder 53 be rotated with anticlockwise and right rotation both sides.In tumbling-box washing machine 1001, the rotary speed of motor 20 is a speed reducing ratio with respect to the ratio of the rotary speed of cylinder 53, by

pulley

55,56 be with 54 to be set at 10.8.

TP1 presses start button in the moment, and tumbling-box washing machine 1001 begins action.If begin action, then washing machine 1001 begins to wash stroke 201.Motor 20 makes cylinder 53 left rotation and right rotation on one side, from feedwater portion 57 to cylinder 53 supply with water and washing agent (stroke 101) on one side.Then, drive division 61 drive motors 20 make cylinder 53 left and right sides approximate equality ground rotations, and the washings that is housed in the cylinder 53 is stirred (stroke 102) with water and washing agent.In agitation stroke 102, finish flushing stroke 201.

After flushing stroke 201 finishes, the washing machine 1001 beginnings first rinsing stroke 202.Drainage Division 58 is discharge water and washing agent (stroke 103) from cylinder 53, and then, feedwater portion 57 usefulness shower nozzles are supplied with water (stroke 104) to washings.Then, drive division 61 drive motors 20 make the high rotation speed rotation (stroke 105) of cylinder 53 with the 800rpm that surpasses 420rpm, utilize inertia to make cylinder 53 rotations make it stop (stroke 106) simultaneously.Then, supply with water, drive division 61 drive motors 20 make cylinder 53 left and right sides approximate equality ground rotations, and the washings that is housed in the cylinder 53 is stirred (stroke 107) with water.

After the first rinsing stroke 202, the washing machine 1001 beginnings second rinsing stroke 203.Drainage Division 58 discharge water from cylinder 53 (stroke 108).Then, drive division 61 drive motors 20 make the high rotation speed rotation (stroke 109) of cylinder 53 with the 800rpm that surpasses 420rpm, utilize inertia to make cylinder 53 rotations make it stop (stroke 110) simultaneously.Then, supply with water, drive division 61 drive motors 20 make cylinder 53 left and right sides approximate equality ground rotations, and the washings that is housed in the cylinder 53 is stirred (stroke 111) with water.

After the second rinsing stroke 203, washing machine 1001 stroke 204 that begins to dewater.Drainage Division 58 discharge water from cylinder 53 (stroke 112).Then, drive division 61 drive motors 20 make the high rotation speed rotation (stroke 113) of cylinder 53 with the 800rpm that surpasses 420rpm.Then, utilize inertia to make cylinder 53 rotations make it stop (stroke 114) simultaneously, finish the washing of clothes.

The circuit of the tumbling-box washing machine 1001 during next, to when running washing and dehydration running describes.

The circuit diagram of the washing machine 1001 when Figure 1B is the washing running.AC/DC

transfer relay

8,11 is switched, and the electric current that flows out from the output 21A of AC power 21 prevents coil 5 via bidirectional triode thyristor 6 and noise, the ac input end 18E of input diode electric bridge 18.The electric current that flows out from the output 21B of AC power 21 prevents that via noise coil 4 from supplying with the ac input end 18F of diode bridges 18.The dc output end 18C of diode bridge 18 is connected with the input side of direction of rotation transfer relay 10, and dc output end 18D is connected with the low speed side winding 2 of motor 20.Control part 62 periodically switches direction of

rotation relay

9,10 simultaneously, makes cylinder 53 with alternately anticlockwise of low speed, right rotation, thus the washing washings.

The circuit diagram of the washing machine 1001 when Fig. 2 is the dehydration running.Control part 62 is opened AC/DC transfer relay 12, switches AC/

DC transfer relay

8,11, and the electric current that will flow out from the output 21A of AC power 21 prevents that via bidirectional triode thyristor 6 and noise coil 5 is to 3 supplies of rotor winding.In addition, the electric current that will flow out from the output 21B of AC power 21 prevents that via noise coil 4 is to 1 supply of high-speed side winding.Thus, make cylinder 53 with high rotation speed rotation, the dehydration of the clothing after washing.

During washing shown in Figure 3, be when rotating below the 420rpm making cylinder 53 with predetermined rotational speed, control part 62 is supplied with DC currents from drive division 61 to motor 20.In addition, when dehydration shown in Figure 3 (stroke 105,109,113), make cylinder 53 with surpass predetermined rotational speed be 420rpm the high rotation speed rotation during T2, T4, T6, control part 62 is supplied with alternating currents from drive division 61 to motor 20.Herein, because speed reducing ratio is 10.8, so the speed 420rpm of the regulation of cylinder 53 is corresponding to the rotary speed 4536rpm of motor 20.The rotary speed of cylinder 53 is T1, T3, T5 during below the predetermined rotational speed (420rpm), and control part 62 makes DC current flow into drive motor 20 from drive division 61 to low speed side winding 2.Thus, drive division 61 drive motor 20 efficiently.If drive division 61 improves the rotary speed of cylinder 53, make rotary speed reach predetermined rotational speed (420rpm), then control part 62 switches to circuit shown in Figure 2 with the circuit of washing machine 1001 from circuit shown in Figure 1B.Thus, control part 62 stops to supply with DC current from drive division 61 to low speed side winding 2, and flows into alternating current, drive motor 20 from drive division 61 to high-speed side winding 1.If the rotary speed of cylinder 53 surpasses predetermined rotational speed, then control part 62 flows into alternating current, drive motor 20 from drive division 61 to high-speed side winding 1.Thus, at the rotary speed height of motor 20, during the big dehydration of the wearing and tearing of carbon brush, can avoid an only lateral wearing of carbon brush, and can suppress the generation of electric wave noise.Stop the rotation (stroke 106,110,114) after surpassing the predetermined rotational speed rotation for drive division 61 makes cylinder 53, control part 62 stops to supply with alternating current from drive division 61 to high-speed side winding 1.Thus, cylinder 53 utilizes the inertia rotation, and its rotary speed diminishes gradually simultaneously.

On the stator of motor 20, the low speed side winding 2 that is wound with high-speed side winding 1 and is connected in series with high-speed side winding 1.T1, T3, T5 during cylinder 53 (motor 20) is with the rotation of the rotary speed below the predetermined rotational speed, control part 62 is supplied with DC current from drive division 61 to high-speed side winding 1 and low speed side winding 2 both sides.T2, T4, T6 during when the dehydration running that cylinder 53 (motor 20) rotates with the high rotation speed that surpasses predetermined rotational speed, control part 62 is supplied with alternating current from drive division 61 to high-speed side winding 1, and does not supply with any electric current to low speed side winding 2.According to this structure, during with the washing running of low rotary speed rotation, the number of turn that is wrapped in the winding on the stator increases at cylinder 53, and promptly ampere-turn increases, so drive division 61 drive motor effectively.When cylinder 53 turned round with the dehydration of high rotation speed rotation, drive division 61 was only supplied with electric current to high-speed side winding 1, so the resistance of winding reduces, can supply with big electric current, thereby can improve the power of motor 20.

In the described tumbling-box washing machine 1001 of embodiment, the carbon brush that does not have a motor is the situation of a lateral wearing only, thus can use small-sized motor, and durability is good.Thereby, be not limited to tumbling-box washing machine, can be widely used in using the various electrical equipments of universal motor.

In addition, be not to limit the utility model by present embodiment.

Claims

1. tumbling-box washing machine, it possesses:

Take in the cylinder of washings;

Make the motor of described cylinder rotation; With

Drive the drive division of described motor,

Described tumbling-box washing machine is characterised in that,

Described drive division is supplied with DC current to described motor and is driven described motor when the washing running, supply with alternating current to described motor and drive described motor when the dehydration running.

2. tumbling-box washing machine as claimed in claim 1 is characterized in that,

Described motor has:

Stator;

Be wrapped in the high-speed side winding on the described stator; With

Be wrapped on the described stator and the low speed side winding that is connected with described high-speed side windings in series,

Described drive division is supplied with DC current in when running washing to described high-speed side winding and described low speed side winding both sides and is driven described motor, and only the described high-speed side winding in described high-speed side winding and described low speed side winding is supplied with alternating current and driven described motor when the dehydration running.

3. tumbling-box washing machine as claimed in claim 2 is characterized in that,

Described drive division when running dehydration only the described high-speed side winding in described high-speed side winding and described low speed side winding supply with alternating current, and do not supply with any electric current to described low speed side winding, drive described motor thus.

4. tumbling-box washing machine as claimed in claim 1 is characterized in that,

Described motor with the rotation of the rotary speed below the predetermined rotational speed, rotates with the rotary speed that surpasses described predetermined rotational speed when the dehydration running when washing is turned round.

5. tumbling-box washing machine, it possesses:

Take in the cylinder of washings;

Make the motor of described cylinder rotation; With

Drive the drive division of described motor,

Described tumbling-box washing machine is characterised in that,

Described drive division is supplied with DC current to described motor and is driven described motor when described motor rotates with the rotary speed below the predetermined rotational speed, supply with alternating current to described motor and drive described motor when described motor rotates with the rotary speed that surpasses described predetermined rotational speed.