KR20000062787A - Drum washer - Google Patents

Drum washer Download PDF

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Publication number
KR20000062787A
KR20000062787A KR1020000011697A KR20000011697A KR20000062787A KR 20000062787 A KR20000062787 A KR 20000062787A KR 1020000011697 A KR1020000011697 A KR 1020000011697A KR 20000011697 A KR20000011697 A KR 20000011697A KR 20000062787 A KR20000062787 A KR 20000062787A
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KR
South Korea
Prior art keywords
control
drum
rotation
micro
angle
Prior art date
Application number
KR1020000011697A
Other languages
Korean (ko)
Inventor
이토마스미
이마무라후미히로
마츠모토사토루
마키노요시유키
Original Assignee
니시무로 타이죠
가부시끼가이샤 도시바
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP11-64795 priority Critical
Priority to JP06479599A priority patent/JP3517600B2/en
Application filed by 니시무로 타이죠, 가부시끼가이샤 도시바 filed Critical 니시무로 타이죠
Publication of KR20000062787A publication Critical patent/KR20000062787A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03CDOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/28Odour seals
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid

Abstract

The present invention relates to a drum type washing machine having a unwinding function for laundry, wherein the washing machine motor 17 directly rotates the drum, and is driven and controlled by the inverter main circuit 39 and the control circuit 44. The control circuit 44 functions as a control means for the micro-angle rotation operation, that is, rotating the washing machine motor 17 by 30 degrees at the machine angle in the forward direction (rotation speed is 50 rpm) and rotating it by 30 degrees in the reverse direction with a minute time. The cycle is repeated 5 cycles for 5 seconds for 1 cycle, whereby the drum is rotated 5 cycles and forward and reverse, thereby effectively preventing the laundry from sticking or agglomeration.

Description

Drum Washing Machine {DRUM WASHER}

The present invention relates to a drum type washing machine having a unwinding function for laundry.

As is known in the drum type washing machine, there is a configuration in which a water tank is installed in an outer box, a drum is installed in the water tank so as to be rotatable in a substantially horizontal axis rotation, and the rotation of the motor is transmitted to the drum through a belt transfer mechanism. The belt transfer mechanism was configured with a drive pulley, a driven pulley and a belt. However, this has a problem in that the number of parts is large and slip occurs in the belt parts, causing the belt to swing and generate vibration and noise.

As a countermeasure, the present inventor considers a configuration in which the drum is directly driven by the motor in a form in which the rotating shaft of the drum and the rotor of the motor are directly connected. In this case, the number of parts can be reduced, the vibration and noise can be reduced, and since the rotation of the motor can be directly transmitted to the drum, the degree of freedom of rotation control of the drum is increased. On the other hand, as a drum type washing machine, laundry may adhere to the drum inner surface, or laundry may become entangled, and the improvement of this is also anticipated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a drum type washing machine which can effectively prevent sticking and entanglement of laundry while using a configuration in which a drum is directly driven by a motor.

1 is an electrical diagram showing a first embodiment of the present invention;

2 is a longitudinal side view of the drum type washing machine;

3 is a diagram illustrating an on-off pattern of a switching device;

4 is a time chart of operation contents;

5 is a time chart of operation contents;

6 is a time chart of operation contents;

7 is a time chart of operation contents;

FIG. 8 shows a second embodiment of the present invention, for explaining the rotational speeds D1 to D12 for every 30 degrees of rotation of the motor; and

9 is a view showing a change in rotational speed during one rotation of the motor.

* Explanation of symbols for main parts of the drawings

3: tank 10: drum

17: washing machine motor (motor) 20: water supply

25: hot air supply device 33: fan motor

34: dry heater (heater) 39: inverter main circuit

40a to 40f: switching element

44: control circuit (micro-angle rotation control means, non-uniform rotation detection means)

The invention of claim 1 is a water tank supported in an outer box,

A drum which is rotatably installed in the tank in a horizontal axis rotation to accommodate laundry;

A motor for directly rotating the drum, and

And a micro-angle rotation control means for controlling the motor to rotate the drum a plurality of forward and reverse rotations within a rotation angle of 90 degrees or less.

In this configuration, the drum is rotated back and forth a plurality of times within a rotation angle of 90 degrees or less, that is, within a quarter turn, so that the drum is reciprocated in a short cycle, and the laundry attached to the drum inner surface is removed and the drum It is also possible to loosen the laundry in the state of agglomeration in the upper part of the inside, to solve the imbalance during dehydration, and to make it convenient to take out the laundry after drying. In this case, since the drum is directly driven by rotation by the motor, there is no rotation transfer loss from the motor to the drum, the drum can be operated reliably, and the reliability can be improved.

The invention according to claim 2 is characterized in that the micro-angle rotation control means controls the motor to rotate the drum a plurality of forward and reverse rotations at a rotation angle of 10 degrees or more and 30 degrees or less.

Thus, by setting the drum to be reverse-rotated a plurality of times at a rotation angle of 30 degrees or less, the drum can be reciprocally rotated in a shorter cycle, and the peeling and unwinding action of the laundry becomes more secure. In addition, when the rotation angle of the drum is set to 10 degrees or more, the vibration of the drum is not caused.

The occurrence of claim 3 is characterized in that the micro-angle rotation control means executes control at the start of operation.

Loosening the laundry prior to the cleaning administration is extremely effective for improving the cleaning effect. In the above configuration, however, the micro-rotational motion control means executes the control at the start of operation, which inevitably causes the laundry to be released before the washing stroke, thereby further improving the washing effect.

The invention of claim 4 is characterized in that the micro-angle rotation control means is adapted to execute control after the dehydration stroke.

In the dehydrating stroke, the drum is rotated at a high speed, so the laundry is often stuck to the inner surface of the drum in the dehydrating stroke. In addition, in the above configuration, since the micro-angle rotation control means performs control after the dehydration stroke, even if the laundry adheres to the inner surface of the drum, it can be detached well, and when the rinsing stroke is performed after the dehydration stroke, The rinsing effect is improved in the rinsing stroke.

The invention according to claim 5 is characterized in that the micro-angle rotational motion control means is adapted to execute the control during or after the drying stroke.

During a drying administration, laundry may be in the state which agglomerated in the drum. Or at the end of the drying cycle, the laundry may be stuck inside, making it difficult to remove. By the way, in the above structure, since the micro-angle rotation control means performs control during the drying stroke or after the completion of the drying stroke, it is possible to loosen the laundry during the drying stroke, or to make it easier to take out the laundry after the drying operation. It becomes possible.

The invention according to claim 6 is provided with nonuniform rotation detecting means for detecting non-uniform rotation of the drum, and the micro-angle rotation control means is configured to execute control when non-uniform rotation is detected by the non-uniform rotation detecting means. Has

If it is possible to detect that the laundry is stuck to the drum or the laundry is agglomerated, it is preferable to execute the micro-angle rotation control when necessary. In this case, it is most important to be able to detect the lamination state or the agglomeration state of the laundry, but according to the present inventors, it can be seen that the detection of the agglomeration state can be detected by detecting the uneven rotation of the drum. there was. However, according to the above configuration, the micro-angle rotation operation control means executes the control when the non-uniform rotation is detected by the non-uniform rotation detection means, so that this can be resolved with good timing when the sticking and bunching occurs. · It is possible to quickly eliminate the bunch and eliminate unnecessary control.

The invention of claim 7 is characterized in that the water supply stroke and the control execution of the micro-angle rotation control means are performed at the same time.

The laundry attached to the inner surface of the drum can be removed or the laundry agglomerated at the upper part of the drum can be removed by the control execution of the micro-angle rotation control means. In this case, if this control is executed in the water supply administration, Water can be expected to exfoliate the laundry and impart flexibility to the laundry, and the synergy can be more effectively eliminated.

The invention of claim 8 is characterized in that the washing course has a washing course for executing the micro-angle rotation control means at a predetermined level and at a predetermined time.

The invention of claim 8 is focused on the following points. In other words, the normal and reverse rotation of the drum a plurality of times within the rotation angle of 90 degrees or less can expect a weak washing action on the laundry if there is a predetermined amount of water in the tank. However, since the washing course has a washing course for executing the micro-angle rotation control means at a predetermined level and at a predetermined time, it is possible to expect a delicate washing effect on the laundry by executing this course.

The invention of claim 9 is characterized in that it comprises a manual input means operated on the user side, and wherein the micro-angle rotation control means executes control based on the operation of the manual input means.

For example, the laundry may not be unwound when the user finishes the drying process and takes out the laundry. Alternatively, the same may be the case when the operation is temporarily stopped and the laundry is taken out. In the above configuration, however, the user can operate the manual input means in such a case so that the desired small angle rotation operation can be performed.

The invention of claim 10 is characterized in that the execution time of the micro-angle rotation operation control means is within 5 seconds.

Since the micro-angle rotation operation rotates the drum forward and backward in a short cycle as described above, a large starting load may be applied to the motor and its electric and mechanical drive portions in the forward and reverse directions. However, in the above configuration, since the execution time of the micro-angle rotation control means is within 5 seconds, the burden on the motor and its electrical and mechanical drive parts can be reduced.

The invention of claim 11 is characterized in that a heater is provided, and the micro-angle rotation control means does not execute the control when the heater is energized.

The micro angle rotation operation causes the drum to rotate forward and backward in a short cycle, so that the motor is subjected to a large starting load in the forward and reverse directions, and the motor current also increases. In this situation, if the heater used in the drying stroke is energized, the power circuit breaker may be cut off beyond the rated current of the home. By the way, in the said structure, since the control of a small angle rotation operation | movement is not performed when a heater is energized, excessive current does not flow.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 7. First, in FIG. 2, the outer box 1 of the drum type washing machine has a rectangular box shape as a whole, and a circular laundry entrance 2a is formed in the front plate part 2. Inside the outer box 1, a tank 3 having a cylindrical shape in which the axial direction is oriented in the front-rear direction is burned by, for example, four pairs (two tanks only) suspension 4 constituting the vibration damping mechanism. It is sexually supported.

This water tank 3 is comprised, for example with the trunk | drum 5 formed from the metal plate, the back board part 6, and the front board part 7, The circular opening 7a is formed in the front board part 7, for example. Formed. And this opening 7a and the said laundry entrance and exit 2a are connected so that it may communicate with the elastic material which forms a tubular whole, for example, the substantially cylindrical connecting member 8 made of rubber | gum. The laundry entrance 2a is opened and closed by the door 9.

The drum 10 is rotatably installed in the water tank 3. This drum 10 is comprised by joining the trunk | drum 11, the back member 12, and the board | plate part 13 which were formed by the metal plate, for example. A plurality of hole portions 11a are formed in the circumferential wall portion of the trunk portion 11, and a circular opening 13a is formed in the front plate portion 13. The rear member 12 is formed by attaching a porous plate member 12b to a frame member 12a having a plurality of vents.

In addition, a drum shaft 14 protrudes rearward from a central portion of the rear member 12 of the drum 10, which is provided through a rear plate portion 6 of the water tank 13. ) Is rotatably supported via the bearing 16, and the drum 10 is rotatably provided.

In addition, the drum 10 is an outer rotor type and is directly driven by a washing machine motor (corresponding to the motor of claim 1) 17 which is a brushless motor. That is, the rear end of the drum shaft 14 is installed so that the rotor 18 having permanent magnets can be rotated integrally, and the stator so as to be located inside the rotor 18 in the bearing housing 15. The stator 19 provided with the core and the coil is provided. Therefore, when the rotor 18 is rotated, the drum 10 is directly driven to rotate through the drum shaft 14.

The water supply 20 is installed in the upper front side in the outer box 1, and this water supply 20 is an electronic water supply valve 21 (refer to FIG. 1) and an electronic water supply for the soft water supply. The valve 22 (refer FIG. 1) is provided, and the water from each water supply valve 21, 22 is supplied to the water tank 3 through the dedicated water supply pipes 21a, 22a, respectively. Further, a drain valve 24 which is opened and closed by a drain valve motor 23 (see FIG. 1) is provided at the bottom of the tank 3, and the tank 3 is opened by opening the drain valve 24. The water inside is drained to the outside.

The hot air supply device 25 with a heat exchanger is provided in the rear part and the front part of the water tank 3, and this is demonstrated. That is, the hot air return hole 26 is formed in the rear plate part 6 of the water tank 3. One end of the heat exchanger 27 for exchanging the outside air with the warm air is connected to the warm air return port 26, and the other end of the heat exchanger 27 is blown through the corrugated connection duct 28. It is connected to the suction side of the. The air blow casing 29 is connected to one end of the duct 30, the heating device 310, and the duct 32 in turn, and the other end of the duct 32 is formed in the connecting member 8. It is connected to the hot air discharge port 8a, and is communicated in the water tank 3.

A fan (not shown) is provided inside the blowing casing 29, and the fan is driven by a drying fan motor 33 (see FIG. 1), and further, in the heating device 31, claims A drying heater 34 (see FIG. 1) corresponding to 11 heaters is provided. In the heat exchanger 27, water for moisture condensation is supplied and drained, and the water is supplied by a dry electromagnetic water supply valve 35 (see FIG. 1).

In such a warm air supply device 25, the drum 10 is rotated during the drying operation and the drying fan motor 33 is rotated at the same time, and the drying heater 34 is energized. The fan is rotated by the drying fan motor 33, and the air in the drum 10 is sucked in the hot air return port 26, as indicated by arrow A, so that the heat exchanger 27, the connecting duct 28, and the blow casing (29), passes through the duct 30, the heating device 31, the duct 32, and returns to the water tank 3 at the hot air outlet 8a. By this circulation, the air is warmed and heat exchanged (dehumidified) at the same time.

The door 9 is locked in a closed state by energizing the door lock solenoid 36 (see Fig. 1), and the lock is released by power cut.

Next, the electrical configuration in FIG. 1 will be described. In other words, a DC power supply circuit 38 having a double voltage rectifying circuit and a smoothing capacitor is connected to both terminals of the AC power supply 37. DC bus lines 38a and 38b are derived from the output terminal of the DC power supply circuit 38, and an inverter main circuit 39 is connected to these DC bus lines 38a and 38b. The inverter main circuit 39 has three-phase bridged connections, for example, switching elements 40a to 40f made of IGBTs, and prefoil diodes 41a to 41f respectively connected in parallel to these switching elements 40a to 40f. Consists of The output terminals 42u, 42v, 42w of the inverter main circuit 39 are connected to three-phase windings 17u, 17v, 17w of the washing machine motor 17, respectively. Moreover, the control terminal (gate) of each switching element 40a-40f of the inverter main circuit 39 is connected to the drive circuit 43 which consists of photocouplers, for example. The drive circuit 43 is controlled by a control signal from the control circuit 44, and controls the switching elements 40a to 40f on and off.

The position detection signal output from the Hall ICs 45u, 45v, 45w, which are the position detection elements of the washing machine motor 17, is configured to be applied to the control circuit 44. The control circuit 44 includes a microcomputer, has a program for rotating the washing machine motor 17, and controls the above-mentioned switching elements 40a to 40f on and off based on the position detection signal. And PWM control to perform PWM control and energization timing control of the applied voltage to each of the windings 17u, 17v, and 17w, and to control the driving of the washing machine motor 17 in rotation. The rotation speed of the motor 17 is also detected based on the position detection signal.

3 shows on and off patterns of the switching elements 40a to 40f at one electric angle, and energization by on and off control at this one electric angle (pattern 1, pattern 2, ... pattern 6). The drum 10 rotates in the so-called machine angle of "30 degrees" in the forward direction. By the on-off control in the reverse direction, the drum 10 rotates in the machine angle "30 degree" reverse direction.

In addition, the control circuit 44 has a program for washing and drying operation, and according to the program, the water supply valves 21, 22, 35, in accordance with the input of the switch input section 46 and the water level detection section 47, The drain valve motor 23, the drying heater 34, the drying fan motor 33, the door lock solenoid 36, and the washing machine motor 17 are driven to control washing and drying operations. In this case, the control circuit 44 also functions as a micro angle rotation operation control means. The switch input section 46 is configured with an automatic driving course selection switch, a fine course selection switch, a micro-angle rotation operation designation switch as a manual input means, a start switch for a temporary stop, and the like. In addition, the water level detecting unit 47 detects the water level in the water tank 3.

The washing and drying operation control and the micro angle rotation operation control in the control circuit 44 will be described.

If the start switch is operated on the autonomous driving course selected by the autonomous driving course selection switch now, according to the operation table of Figs. 4, 5 and 6 (these Figs. 4, 5 and 6 are continuous in time). Each device is controlled (the hatched portion in each figure indicates the operating temperature) to control and execute each stroke. In addition, the door lock solenoid 36 is turned on (closed state lock), and this is cut off when the corresponding stroke ends or when the operation is paused by the pause switch, and the lock is released. Hereinafter, although each stroke is demonstrated, the water supply valve 21, 22, 35, the drain valve motor 23, the drying heater 34, the drying fan motor 33, the solenoid 36 for a door lock, and the washing machine motor 17 ) Is discussed in the section related to the present invention.

(1) Each stroke in cleaning operation

(1-1) Capacity detection administration This energizes the washing machine motor 17 in a constant energization pattern, cuts off at 600 rpm, and detects the capacity (weight) of the laundry by measuring the time at which the rotational speed drops to 330 rpm at this cut-off point. After that, the brake is applied to the motor 17 by, for example, direct current braking.

(1-2) Water Supply Administration This is for supplying a predetermined amount of water to the water tank 3 by energizing and opening the water feed valve 21 for water supply normally.

(1-3) Cleaning administration This repeats the washing machine motor 17 on 27 seconds (50 rpm) in the electrostatic direction, rest 3 seconds, and 27 seconds on (50 rpm) in the reverse direction.

(2) Each stroke by rinsing operation (we perform this three times)

(2-1) Dehydration administration This raises the washing machine motor 17 stepwise at 100 rpm, 600 rpm, and 900 rpm, and continues each rotational speed for a predetermined time. In addition, during the initial 100 rpm rotation of this stroke, the rotational speed is periodically lowered to 80 rpm during the dehydration.

(2-2) Brake Administration This brakes the washing machine motor 17.

(2-3) Micro-angle rotating motion control stroke This is stroke control by the micro-angle rotation operation control means in the control circuit 44. That is, while energizing and opening the water supply valve 21 (this is a water supply stroke), the washing machine motor 17 is rotated 30 degrees at the machine angle in the forward direction (rotation speed is 50 rpm) and rotated 30 degrees in the reverse direction with a minute time. One cycle is used, and 5 cycles are repeated for 5 seconds. As a result, the drum 10 rotates forward and backward for five cycles.

Since the micro angle rotation operation control stroke executed at this time is after the dehydration stroke, for example, when the laundry adheres to the inner surface of the drum 10 by dehydration, the laundry can be removed by the micro angle rotation operation. have. In this case, since the water supply administration is carried out at the same time, the water to be watered can be expected to exfoliate the laundry and give the flexibility to the laundry.

(2-4) Water supply administration Same as the above. In this case, it can be said that it is the continuation in the water supply stroke at the previous minute rotation control control stroke.

(2-5) Rinse administration… Same as the above (1-3) cleaning administration.

(2-6) Termination administration

(3) Each stroke in the final rinse operation

This performs the same stroke as the above rinsing operation. The characteristic here is that the non-angle rotation operation control stroke is executed after the dehydration stroke and at the same time as the water supply stroke, and as a result, the sticking of the laundry can be more effectively achieved. In this case, the water supply stroke is supplied by a water supply valve 22 for input such as a softener.

(4) Each stroke in the last dehydration operation

(4-1) Final dehydration operation This is almost the same as the above (2-1) dehydration stroke, but the duration of 900 rpm is long.

(4-2) Brake Administration Same as above.

(4-3) Micro-angle rotation control control Same as above. Also in this case, the sticking of the laundry can be eliminated more effectively as described above. In particular, in this final dewatering operation, the user may take out the laundry arbitrarily, and as the adhesion of the laundry is removed (removed), the taking out of the laundry becomes easy.

(5) Each stroke in dry operation

(5-1) Temporary Administration

(5-2) Drying administration The washing machine motor 17 repeats 57 seconds on (55 rpm) in the electrostatic direction, 3 seconds pause, and 57 seconds on (55 rpm) in the reverse direction. At this time, the drying water supply valve 35, the drain valve motor 23, the drying heater 34, and the drying fan motor 33 are energized to bring the operating temperature to the air. Is warmed, dehumidified and circulated.

(5-3) Cooling stroke The washing machine motor 17 repeats 57 seconds on (55 rpm) in the electrostatic direction, 3 seconds pause, and 57 seconds on (55 rpm) in the reverse direction. The drying water supply valve 35 and the drying heater 34 are disconnected and cold air is circulated.

(5-4) Micro-angle rotation control control Same as above. In this case, at the end of the previous drying administration, the laundry may be bundled inside, making it difficult to remove the laundry. By the way, the micro-angle rotation control control stroke executed after this drying stroke can loosen the laundry satisfactorily and facilitate the take out of the laundry.

(6) Each stroke in software maintenance driving

(6-1) Temporary Administration

(6-2) Soft operation administration This repeats the washing machine motor 17 12 seconds on (55rpm) in the electrostatic direction, 3 seconds pause, 12 seconds on (55rpm) in the reverse direction.

In addition, the control circuit 44 controls each device as shown in the operation time chart shown in FIG. 7 when a delicate course is selected by the operation of the fine course selection switch and the start switch is operated. In addition, in FIG. 7, operation | movement is shown about the normal water feed valve 21 and the drain valve motor 23, and abbreviate | omits about the other apparatus.

In this delicate course, washing operation (water stroke, washing stroke), two rinsing operations (dehydration stroke, brake stroke, water stroke, first rinse stroke, second rinse stroke) and final dehydration stroke (final dehydration stroke, brake) Although the administration) is executed, the features will be described.

In the washing stroke, the micro-rotational motion control for 5 seconds is performed a plurality of times with a 30-second pause while the required time of the washing stroke is 27 minutes while the water is collected up to a predetermined level. One-time micro-angle rotation control is the same as the above-described case, and the washing machine motor 17 is rotated 30 degrees at the machine angle in the forward direction (rotation speed is 50 rpm) and rotates 30 degrees in the reverse direction with a minute time as one cycle. Repeat 5 cycles for 5 seconds. As a result, the drum 10 is rotated for 5 cycles. Further, in the first rinsing stroke and the second rinsing stroke, the micro-angle rotational motion control is similarly performed during the predetermined time required.

In this delicate course, the micro-angle rotation control is performed at a predetermined water level and a predetermined time, so that the drum 10 can be expected to have a weak washing action on the laundry by a short period of forward and reverse rotation. Delicate cleaning effect can be expected.

According to this embodiment described above, since the motor 17 is controlled to rotate the drum 10 forwards and backwards a plurality of times at a rotation angle of 30 degrees, the drum 10 can be reciprocally rotated in a short cycle, and the drum ( 10) The laundry adhering to the inner surface can be detached well and at the same time the laundry agglomerated in the drum 10 can be released well. Moreover, the imbalance at the time of dehydration can be eliminated, or the laundry after drying can be made easy. In this case, since the drum 10 is directly rotated by the motor 17, the drum can be reliably operated without rotation transfer loss from the motor 17 to the drum 10, thereby improving the reliability. Can be.

In particular, by setting the rotation angle of the drum 10 to 10 degrees or more, the drum 10 does not generate vibration. That is, although the drum 10 which makes the rotation angle of the drum 10 less than 10 degree turns to reverse rotation in a very short period, there exists a possibility that the vibration of the drum 10 may arise, but there is no such problem in this embodiment. .

In addition, the initial purpose of the drum 10 can be achieved if the drum 10 is rotated forward and backward a plurality of times within a rotation angle of 90 degrees or less.

In addition, according to this embodiment, since the micro-angle rotation control is executed after the dehydration stroke, even if the laundry is stuck to the inner surface of the drum 10 in the dehydration stroke, it can be detached well and the dehydration stroke is performed. When the rinsing stroke is performed later, the rinsing effect can be improved in the rinsing stroke.

In addition, according to the present embodiment, since the micro-rotation motion control is executed after the end of the drying stroke, the laundry may be stuck inside the drum 10 at the end of the drying stroke, so that it is difficult to remove the laundry. Can facilitate laundry removal. Further, the micro angle rotation operation control may be executed during the drying operation. In this way, even when the laundry is agglomerated in the drum during the drying stroke, the laundry can be unwound during the drying stroke, thereby contributing to the improvement of the drying effect.

In addition, according to the present embodiment, since the water supply stroke and the micro-angle rotation control are executed at the same time, it is possible to expect the action of peeling off the laundry or giving the flexibility to the laundry by the water supplied. It is possible to more effectively eliminate sticking and bunching.

In addition, the washing course has a course for executing the micro-angle rotation control at a predetermined water level and a predetermined time, so that a weak washing action can be expected for the laundry, and a delicate washing effect can be expected for the laundry.

In addition, since the micro-angle rotation operation designation switch, which is a manual input means operated on the user side, is provided, and the micro-angle rotation operation control is executed when this switch is operated, the desired micro-angle rotation operation can be performed on the operation side. According to the needs of the user, the laundry can be removed and unpacked, which is convenient.

In particular, according to the present embodiment, since the execution time of the micro-angle rotation control is set to 5 seconds or less, the motor 17 and the switching elements 40a to 40f, which are its electric drive portions, or the rotating shaft 14 and the bearings (mechanical drive portions). The burden on 16) can be made small and the service life can be lengthened.

In addition, according to this embodiment, since the micro angle rotation operation control is not executed when the drying heater 34 is energized, excessive current flow can be eliminated. That is, the micro-angle rotation operation described above causes the motor current to increase, and if the dry heater 34 is energized in this situation, the power circuit breaker may be cut off beyond the rated current value of the home. However, there is no such problem in the above configuration.

In addition, in the above embodiment, the micro-angle rotation control may be controlled at the start of operation, that is, before the washing operation. In this way, the laundry can be unwound by the micro-angle rotation control prior to the washing operation, which can contribute to the improvement of the washing effect.

8 and 9 show a second embodiment of the present invention, and in FIG. 8 are diagrams for explaining the rotation speeds D1 to D12 for every 30 degrees of rotation angle of the motor 17. FIG. Is a diagram showing a change in rotational speed during one rotation. In this embodiment, the control circuit 44 has a function of detecting non-uniform rotation of the drum 10, and is characterized in that the micro-angle rotation operation control is executed when non-uniform rotation is detected.

That is, the control circuit 4 measures the rotational speeds D1 to D12 during the rotational angle of 30 degrees of the drum 10, respectively, so that the respective rotational speeds D1 to D12, the average speed Dav and the absolute value of the difference. The integrated value S is calculated, and it is determined whether or not the uneven rotation is large according to the magnitude of the integrated value S. The rotation speeds D1 to D12 during the rotation angle 30 degrees are time counted each time the mechanical angle of the motor 17 rotates from the initial angle 0 to FIG. 30 degrees, and at the count values T1 to T12. Calculate. The average speed Dav is obtained by dividing the total value of the rotation speeds D1 to D12 between 30 degrees by 12. As the timing of detecting such nonuniform rotation, the initial stage of the dehydration stroke is preferable. In this case, it is good to energize with the predetermined electricity supply pattern of the degree to which the rotation speed of the motor 17 is not so fast (around 100 rpm).

According to this embodiment, since the uneven rotation of the drum 10 can be detected, it is possible to detect the state of sticking and clumping of laundry, and when the uneven rotation is detected, the micro angle rotation operation control is executed. When sticking and bunching occurs, this can be solved in a timely manner, and the fast sticking and bunching can be eliminated and unnecessary control can be eliminated.

As can be seen from the above description, the present invention can obtain the following effects.

According to the invention of claim 1, there is provided a configuration in which the drum is directly rotated by a motor, and at the same time, a micro-angle rotation control means for controlling the motor to rotate the drum back and forth a plurality of times within a rotation angle of 90 degrees or less. Therefore, it becomes possible to remove the laundry attached to the inner surface of the drum, to loosen the laundry agglomerated in the upper part of the drum, to solve the imbalance during dehydration, or to facilitate the removal of the laundry after drying. In addition, there is no rotation transfer loss from the motor to the drum, and the drum can be reliably rotated at a small angle, thereby improving reliability.

According to the invention of claim 2, since the micro-angle rotation control means controls the motor to rotate the drum a plurality of forward and reverse rotations at a rotation angle of 10 degrees or more and 30 degrees or less, the drum can be reciprocally rotated in a shorter period. Separation and loosening of the laundry becomes more secure, and vibration of the drum does not occur.

According to the invention of claim 3, since the micro-angle rotation control means executes the control at the start of operation, it can contribute to the improvement of the washing effect.

According to the invention of claim 4, since the micro-angle rotation control means executes the control after the dehydration stroke, even if the laundry adheres to the inner surface of the drum, it can be detached satisfactorily, and the rinsing effect in the subsequent rinsing stroke is obtained. Can contribute to improvement.

According to the invention of claim 5, since the micro-angle rotation control means performs control during the drying stroke or after the completion of the drying stroke, it can contribute to the improvement of the drying effect and facilitate the removal of the laundry after the drying operation. It may be.

According to the invention of claim 6, there is provided a non-uniform rotation detecting means for detecting non-uniform rotation of the drum, and the micro-angle rotation control means to perform control when non-uniform rotation is detected by the non-uniform rotation detecting means. In this way, it is possible to resolve this in a timely manner at the time of the occurrence of sticking and agglomeration, and to quickly eliminate the sticking and agglomeration, and to eliminate unnecessary control.

According to the seventh aspect of the present invention, since the water supply administration and the control execution of the micro-rotational motion control means are performed at the same time, the lamination and agglomeration of the laundry can be more effectively achieved.

According to the invention of claim 8, since the washing course has a washing course for executing the micro-angle rotation control means at a predetermined level and at a predetermined time, the washing process can achieve a delicate washing effect on the laundry.

According to the invention of claim 9, since the manual input means operated on the user side is provided, and the micro-angle rotation operation control means is configured to execute control when the manual input means is operated, the micro-angle rotation operation desired by the user is performed. It can be carried out.

According to the invention of claim 10, since the execution time of the micro-angle rotation control means is within 5 seconds, the burden on the motor and its electrical and mechanical drive parts can be reduced, and the service life can be extended.

According to the invention of claim 11, since the heater is provided and the micro-rotational motion control means does not perform the control when the heater is energized, the generation of excessive current can be prevented.

Claims (11)

  1. A tank supported in an outer box,
    A drum rotatably installed in the tank in a horizontal axial rotation to accommodate laundry;
    A motor for directly rotating the drum, and
    And a micro-angle rotation control means for controlling the motor to rotate the drum back and forth a plurality of times within a rotation angle of 90 degrees or less.
  2. The method of claim 1,
    The micro-angle rotation operation control means is a drum type washing machine, characterized in that for controlling the motor to rotate the drum a plurality of times at a rotation angle of 10 degrees or more and 30 degrees or less.
  3. The method of claim 1,
    The micro-angle rotating operation control means is configured to execute the control at the start of the drum type washing machine.
  4. The method of claim 1,
    The micro-angle rotation operation control means is a drum type washing machine, characterized in that to perform the control after the dehydration stroke.
  5. The method of claim 1,
    The micro-angle rotating operation control means is a drum type washing machine, characterized in that for performing control during or after the drying stroke.
  6. The method of claim 1,
    And a non-uniform rotation detecting means for detecting non-uniform rotation of the drum, wherein the microscopic rotation operation control means is configured to execute control when an uneven rotation is detected by the non-uniform rotation detecting means.
  7. The method of claim 1,
    A drum type washing machine characterized in that the water supply stroke and the control execution of the micro-angle rotation control means are performed at the same time.
  8. The method of claim 1,
    A drum type washing machine having a washing course for executing a micro angle rotation control means at a predetermined level and a predetermined time as a washing course.
  9. The method of claim 1,
    And a manual input means operated on the user side, wherein the micro-angle rotation control means executes control based on the operation of the manual input means.
  10. The method of claim 1,
    Drum-type washing machine, characterized in that the running time of the micro-angle rotation operation control means is within 5 seconds.
  11. The method of claim 1,
    A drum type washing machine comprising a heater, wherein the micro-angle rotation control means does not execute control when the heater is energized.
KR1020000011697A 1999-03-11 2000-03-09 Drum washer KR20000062787A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11-64795 1999-03-11
JP06479599A JP3517600B2 (en) 1999-03-11 1999-03-11 Drum washing machine

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KR20000062787A true KR20000062787A (en) 2000-10-25

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JP (1) JP3517600B2 (en)
KR (1) KR20000062787A (en)
CN (1) CN1252340C (en)
TW (1) TW481182U (en)

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JP4835656B2 (en) * 2008-07-10 2011-12-14 パナソニック株式会社 Drum type washer / dryer
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CN1252340C (en) 2006-04-19
JP3517600B2 (en) 2004-04-12
TW481182U (en) 2002-03-21
CN1266921A (en) 2000-09-20

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