KR100345013B1 - Washing machine - Google Patents

Abstract

The present invention relates to a washing machine for washing, rinsing and dewatering laundry in a drum rotatably provided about a rotating shaft provided in a substantially horizontal direction, characterized in that the laundry in the drum is adhered to the inner wall of the drum, The washing machine according to claim 1, characterized in that the laundry is contained and the rotating shaft (4) provided in a substantially horizontal direction is set at a center The drum 1 rotatable by the first motor 15 and the second motor 16 is driven by the first motor 15 and the second motor 16 and the number of revolutions of the first motor 15 and the second motor 16 is controlled by the control means. The control means drives the second motor 16 to increase the number of revolutions of the drum to drive the drum with the number of revolutions when the laundry in the drum is adhered to the inner wall of the drum by the centrifugal force, The rinsing time, the rinsing time, the dehydration time, the dehydration time, the dehydration time, the dehydration time, the dehydration time, the dehydration time, the dehydration time, and the dehydration time are determined in accordance with the detected amount of the laundry. The number of revolutions and the like can be changed.

Description

Washing machine {WASHING MACHINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for washing, rinsing, and dewatering laundry in a drum provided rotatably around a rotating shaft provided in a substantially horizontal direction.

Conventionally, this type of washing machine is constructed as shown in Fig. Hereinafter, the configuration will be described.

As shown in the drawing, the drum 1 is provided with a large number of water holes 2 on its outer periphery and is rotatably installed in the water receptacle tank 3. One end of the rotary shaft 4 is fixed to the center of rotation of the drum 1 and the drum pulley 5 is fixed to the other end of the rotary shaft 4. [ The motor 6 is connected to the drum pulley 5 by a belt 7 and drives the drum 1 to rotate. A lid 8 is provided in the opening of the drum 1 so as to be openable and closable.

The water storage tank 3 is suspended from the washing machine main body 9 by the spring body 10 and is supported so as to be prevented from being transmitted to the washing machine main body 9 by the vibration damping damper 11 At the same time, a weight 12 for reducing vibrations during dehydration is provided. The heater (13) heats the wash water in the water receiving tank (3). The controller 14 controls the operation of the motor 6 and the heater 13 to sequentially control a series of strokes such as washing, rinsing, and dehydration.

The operation in the above configuration will be described. When the cover 8 is opened and the laundry is put into the drum 1 and the operation is started, the drum is rotated at a low speed by the motor 6, and the laundry in the drum 1 is lifted and dropped onto the water surface . Thus, the washing process is performed. Even in the rinsing cycle, the same operation as that of the washing cycle is performed.

When the laundry 1 in the drum 1 is unbalanced, that is, when unevenness occurs, the drum 1 and the water-retaining tank 3 are separated from each other by the rotation of the drum 1, The vibration is damped by the vibration damper 11 and is not transmitted to the washer main body 9.

In such a conventional configuration, there is a problem that the cleaning rate differs depending on a large amount of laundry in the drum 1 when the laundry is washed for a predetermined period of time. At the time of washing, the drum 1 is rotated at a rotation speed of about 53 rpm to be washed, but when the amount of laundry is small, the laundry moves in the drum 1 more and the cleaning rate is good. On the other hand, when the amount of laundry is large, the movement of the laundry in the drum 1 is small and the cleaning rate is worse than when the amount of laundry is small. Therefore, it is necessary to change the washing method depending on the amount of the laundry in order to make the washing rate constant regardless of the amount of the laundry.

In addition, there is a problem that the rinsing rate is different when the rinsing is performed constantly depending on the amount of laundry in the drum 1. At the time of rinsing, the drum 1 is rotated at a rotation speed of about 53 rpm to perform rinsing. When the amount of laundry is small, the laundry is largely moved in the drum 1 and the rinsing rate is good. On the other hand, when the amount of laundry is large, the movement of the laundry in the drum 1 is small and the rinsing rate is worse than when the amount of laundry is small. Therefore, in order to keep the rinsing rate constant regardless of the amount of laundry, it is necessary to change the rinsing method according to the amount of laundry.

In addition, there is a problem that the dehydration rate is different when dehydrating for a predetermined time depending on the amount of laundry in the drum 1. During the dehydration, the drum 1 is rotated at a rotation speed of about 600 to 1000 rpm to dehydrate. Generally, the dehydration rate is good when the amount of laundry is small, and the dehydration rate is worse than when the amount of laundry is small when the amount of laundry is large. Therefore, in order to make the dewatering rate constant regardless of the amount of laundry, it is necessary to change the dewatering method according to the amount of laundry.

SUMMARY OF THE INVENTION The present invention has been made to solve the above conventional problems and it is an object of the present invention to accurately detect the amount of laundry in a state in which the laundry in the drum sticks to the inner wall of the drum and to improve the cleaning rate, .

1 is a sectional view of a washing machine according to a first embodiment of the present invention;

2 is a partially cutaway rear view of the washing machine

3 is a block diagram of the washing machine

Fig. 4 is a timing chart of the lumbar movement of the washing machine;

Fig. 5 is a flowchart showing a main part operation sequence of the washing machine

6 is a cross-sectional view of a conventional dewatering-

DESCRIPTION OF THE REFERENCE NUMERALS

1: drum 4: rotary shaft

15: first motor (motor) 16: second motor (motor)

21: control means

In order to attain the above object, the present invention provides a washing machine comprising: a drum for storing laundry; a drum rotatable around a rotating shaft provided in a substantially horizontal direction; a motor driven by the drum; The control means controls the motor so that the number of revolutions of the drum is increased by driving the motor so as to drive the drum with the number of revolutions when the laundry inside the drum is adhered to the inner wall of the drum by centrifugal force, The washing time, the rinsing time, the rinsing time, the dewatering time, the dewatering number of rotations, and the like can be changed according to the detected amount of laundry.

Thus, the amount of laundry can be accurately detected in a state in which the laundry in the drum sticks to the inner wall of the drum, and the cleaning rate, the rinsing rate, and the dehydration rate can be kept constant regardless of the amount of laundry.

A first invention of the present invention is a washing machine comprising: a drum rotatable about a rotary shaft accommodating laundry and provided in a substantially horizontal direction; a motor for driving the drum; and control means for controlling the rotation speed of the motor, The control means controls the motor so that the number of revolutions of the drum is increased by driving the motor so as to drive the drum with the number of revolutions when the laundry in the drum is adhered to the inner wall of the drum by centrifugal force, And the amount of laundry in the drum is detected from the change in the number of rotations caused by the inertia of the drum. The drum is driven by the number of revolutions when the laundry in the drum adheres to the inner wall of the drum, The rate of decrease in the rotational speed due to the inertia of the drum is correlated with the amount of laundry in the drum. When the amount of laundry is large, the rotational speed is slowed down, If there are fewer revolutions will decrease quickly. Therefore, in a state in which the laundry in the drum sticks to the wall of the drum, the amount of laundry can be accurately detected from the change in the number of rotations due to the inertia of the drum after interruption of energization of the motor, Can be changed.

The second aspect of the present invention is characterized in that, in the first aspect of the present invention, the control means corrects the change in the number of revolutions caused by inertia of the drum by a change in the increase in the number of revolutions of the drum when the drum is energized, The change in the number of revolutions caused by the inertia of the drum after the interruption of the energization of the motor in the state where the laundry in the drum is stuck to the inner wall of the drum is detected by detecting the amount of laundry in the drum, And the ambient temperature. When the tension of the belt is strong, the total drum running speed decreases rapidly. When the ambient temperature is high, the decrease in the rotation speed is slow. On the other hand, when the drum is energized to drive the drum, the increase in the number of revolutions is slow when the amount of laundry is large, while the increase in the number of revolutions of the drum is slow when the tension of the belt is high, The higher the ambient temperature, the faster the rise in the number of revolutions. Therefore, by correcting the change in the number of revolutions caused by the inertia of the drum due to the change in the increase in the number of revolutions when the drum is driven by energizing the motor, the tension of the belt tensioned between the motor and the drum, The influence of temperature and the like can be eliminated, and the amount of laundry can be detected with high precision.

According to a third aspect of the present invention, in the second aspect of the present invention, there is provided a voltage detecting means for detecting a voltage of a commercial power supply (commercial power supply), wherein the control means controls, by the output of the voltage detecting means, The change in the number of revolutions caused by the inertia of the drum after the interruption of the energization of the motor is not related to the voltage of the commercial power supply. Therefore, the influence of the voltage of the commercial power supply at the time of correcting the rotational speed can be eliminated by correcting the change in the rise of the rotational speed of the drum by the output of the voltage detecting means, and the amount of laundry can be detected more accurately can do.

A fourth aspect of the present invention is the washing machine according to any one of the first to third aspects of the present invention, wherein the control means is configured to detect the amount of the laundry in the drum from the change in the number of revolutions caused by inertia of the drum, In the case where water is contained in the laundry in the drum, when the amount of water contained in the laundry is different due to the cloth of the laundry, and the amount of water contained in the laundry is different, the amount of laundry can not be accurately detected Since the laundry is in a dry state at the time of starting the laundry, the amount of the laundry can be accurately detected regardless of the quality of the laundry by detecting the laundry in a dry state.

According to a fifth aspect of the present invention, in the first aspect of the present invention, there is provided a water storage tank for covering the drum from the outside, and a water level detecting means for detecting the water level of the water storage tank, wherein the control means controls the water level detecting means And when the level detected by the level detecting means is higher than a predetermined level, if there is water remaining in the drum, or if laundry containing water is put into the drum In any case, the laundry in the drum contains water, the amount of water contained in the laundry is different due to the porosity of the laundry, and the amount of the laundry can not be accurately detected, so that the amount of the laundry is not detected , It is possible to exclude inaccurate data.

In the sixth to tenth inventions, as in the first to fifth inventions, it is possible to detect the amount of laundry and change the number of times of rinsing according to the amount of laundry.

In the eleventh to fifteenth inventions, it is possible to detect the amount of laundry in the same manner as in the first to fifth inventions, and to change the rinse time according to the amount of laundry.

According to the sixteenth to twentieth inventions, it is possible to detect the amount of laundry and to change the time of dehydration according to the amount of laundry, as in the first to fifth inventions.

In a twenty-first aspect of the present invention, in the sixteenth to eighteenth aspects of the present invention, the control means performs preliminary dewatering at a rotational speed lower than the dewatering rotational speed before dewatering, The amount of laundry in the drum is detected from the change in the number of revolutions and the amount of laundry in the drum detected at the start of washing is corrected. In the preliminary dewatering, water is contained in the laundry, By detecting the amount, the amount of laundry can be detected in the state of the dewatering stroke, and the amount of laundry can be corrected by the detection result.

In the twenty-sixth to twenty-sixth inventions, as in the first to fifth inventions, it is possible to detect the amount of laundry and to change the number of spin-drying cycles according to the amount of laundry.

The twenty-seventh invention is the twenty-sixth invention according to any of the twenty-second to twenty-sixth inventions, wherein the control means performs preliminary dewatering at a rotational speed lower than the dewatering rotational speed before dewatering, The amount of laundry in the drum is detected from the change in the number of revolutions and the amount of laundry in the drum detected at the start of washing is corrected. In the preliminary dewatering, water is contained in the laundry, By detecting the amount, the amount of laundry can be detected in the state of the dewatering stroke, and the amount of laundry can be corrected by the detection result.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same components as those of the conventional example are denoted by the same reference numerals, and a description thereof will be omitted.

(Example 1)

As shown in Figs. 1 and 2, the first motor (motor) 15 rotates the drum 1 at a first rotation speed N ₁ (for example, 53 rpm) to perform washing or rinsing And the second motor (motor) 16 rotate the drum 1 at a second rotation speed N ₂ (for example, 1000 rpm) to dewater. The first motor 15 and the second motor 16 are constituted by an induction motor and are connected to a driven pulley 19 via belts 17 and 18, respectively.

The driven pulley 19 has two kinds of reduction ratios and the first motor 15 is connected to the driven pulley 19a having a large reduction ratio via the belt 17 and the second motor 16 is connected to the belt 18 is connected to the driven pulley 19b having a small reduction ratio and is fixed to the other end of the rotary shaft 4 having one end fixed to the center of rotation of the drum 1. [

The control device 20 controls the first motor 15, the second motor 16, and the like, and is configured as shown in Fig. The control means 21 is constituted by a microcomputer and includes a heater 13, a first motor 15, a second motor 16, a water supply valve (not shown) via a power switching means 22 constituted by a bidirectional thyristor, The valve 23, the drain pump 24, and the like, and sequentially controls a series of strokes of washing, rinsing, and dewatering. The heater 13 heats the washing water in the water receiving tank 3 so that the water feed valve 23 is supplied into the water receiving tank 3 and the drain pump 24 discharges the washing water in the water receiving tank 3 will be.

The input setting means 25 inputs the necessary set course, the start of operation, etc., to the control means 21. The display means (26) displays the setting contents and the operation state by the input setting means (25). The water level detecting means 27 detects the water level in the water receiving tank 3 and the water temperature detecting means 28 detects the water temperature in the water receiving tank 3 and inputs them to the control means 21 respectively. The rotational speed detecting means 29 detects the rotational speed of the drum 1 by detecting the rotational speed of the first motor 15 and inputs the detected rotational speed to the control means 21. [ The storage means 30 stores data and the like necessary for a series of controls. The voltage detecting means 31 detects the voltage of the commercial power supply 32 and inputs the detected voltage to the control means 21. Reference numeral 33 denotes a power switch.

The control means 21 receives the output of the rotation number detecting means 29 while the laundry is dry at the time of starting the laundry and the drum 1 is rotated by the second motor 16 (For example, 600 rpm), and the change in the number of revolutions due to the inertia of the drum 1 after the second motor 16 is cut off (for example, after 6 seconds from 500 rpm) The amount of laundry in the drum 1 is detected by the change of the number of revolutions.

At this time, the change in the rotational speed due to the inertia of the drum 1 varies depending on the tension of the belts 17 and 18, the ambient temperature, and the like. Therefore, (For example, a change in the number of revolution after 3 seconds from 200 rpm). That is, when the tension of the belts 17 and 18 is high, the change in the number of revolutions due to the inertia of the drum 1 after the second motor 16 is shut off is large, and the change in the number of revolutions is small. If the ambient temperature is low, the change in the number of revolutions due to inertia of the drum 1 after the second motor 16 is shut off is large, and the change in the number of revolutions is small. Therefore, the influence of the tension of the belts 17 and 18 and the influence of the ambient temperature can be corrected by irradiating both the change of the rising revolution number and the change of the revolution number by the inertia.

Since the change in the number of revolutions of the drum 1 when driven by the second motor 16 is changed by the voltage of the commercial power supply 32, the voltage detection for detecting the voltage of the commercial power supply 32 Is corrected by the output of the means (31). In other words, when the voltage of the commercial power supply 32 is high, the change of the rising revolution number becomes large. Therefore, it can be corrected by the output of the voltage detecting means 31 for detecting the voltage of the commercial power supply 32.

4, the control means 21 controls the drum 1 to drive the drum 1 at the first rotation speed N ₁ before the dewatering process for driving the drum 1 at the second rotation speed N ₂ , A laundry balancing stroke in which the number of revolutions is gradually raised from the first rotation speed N ₁ to the third rotation speed N ₃ (for example, 100 rpm), and a laundry balance process in which the water balance tank 3 number of revolutions lower fourth rotation than that corresponding to the vibration resonance point N ₄ (for example, 150rpm) after the first preliminary dewatering stroke, the first preliminary dewatering driven by the administration, the laundry by driving the third rotation speed N ₃ imbalance after administration first imbalance determined stroke, the first unbalance is determined that the determination by detecting the (unbalance), water receiving tank 3 can rotate a high rotational fifth than the number corresponding to the vibration resonance point such as N ₅ (for example, 500rpm ) after the second preliminary dewatering stroke, the second preliminary dewatering driven by the stroke, the third rotation speed to obtain N ₃ To and through the second stroke for determining imbalance determined by detecting the unbalance of the washing to enter the dewatering stroke.

In the unbalance determination step, the rotation number detection means 29 first detects the rotation number of the first motor 150, and controls the first motor 15 to the third rotation number N ₃ by this detection output, The conduction angle of the power switching means 22 at this time is fixed to drive the first motor 15. The fluctuation range of the rotational speed of the first motor 15 at the time of driving by this high precision angle is compared with a reference value The unbalance of the laundry in the drum 1 is determined and the reference value is changed in accordance with the amount of laundry in the drum 1. [

The operation of the above constitution will be described. The lid 8 is opened to put the laundry into the drum 1 and the power switch 33 is turned on. Then, the start switch (not shown) of the input setting means 25 is operated The water supply valve 23 is operated to feed water. When the water level detecting means 27 detects a predetermined water level, the water supply is stopped, and when the operation is started, the amount of laundry in the drum 1 is detected, 1 motor 15 is driven. In the washing cycle, since the laundry contains water, the drum 1 is rotated at a low speed by the first motor 15 while the replenishing water is supplied, and the laundry in the drum 1 is lifted and dropped onto the water surface.

At this time, the heater 13 is energized to heat the washing water in the water receiving tank 3, the water temperature detecting means 28 detects the water temperature in the water receiving tank 3, and the temperature of the washing water is maintained at a substantially constant temperature . When the washing cycle is completed, the drain pump 24 operates to drain the washing water in the water receiving tank 3. Thereafter, in the dewatering process via the rinsing cycle, the drum 1 is driven to rotate at a high speed, and the laundry is centrifugally dewatered.

Next, an operation of detecting the amount of laundry in the drum 1 at the start of washing will be described with reference to Fig.

The voltage is detected by the voltage detecting means 31 at step 41 and the voltage of the commercial power supply 32 is detected at step 41. At step 42, And the drum 1 is driven. When the total number of revolutions of the drum 1 reaches 200 rpm in step 43, the timer built in the control means 21 is stopped in step 44, and when 3 seconds elapse in step 45, the number of revolutions of the drum 1 The rotation number N ₀₁ is detected, the change amount DELTA N ₁ from 200 rpm is stored, and the timer is reset in step 47. Here, the amount of change DELTA N < ₁ &

ΔN ₁ = ΔN ₀₁ -200

.

When the number of revolutions of the drum 1 reaches 600 rpm in step 48, the second motor 16 is turned off in step 49. Therefore, the number of revolutions of the drum 1 gradually decreases. At this time, the rate of decrease in the number of rotations of the drum 1 is correlated with the amount of laundry in the drum 1. When the amount of laundry is large, the decrease in the number of rotations is slow. It deteriorates quickly.

When the number of revolutions of the drum 1 reaches 500 rpm in step 50, the timer is started in step 51, and when 6 seconds elapses in step 52, the number of revolutions N ₀₂ of the drum 1 at this time is detected in step 53, and by storing the amount of change △ N ₂ from. Here, the amount of change DELTA N < ₂ &

ΔN ₂ = 500-N ₀₂

. Next, in step 54, the wash quantity index Ga is calculated by the following equation.

Ga = 0.75 x (1 - 0.35 (v-100))? N ₁ +? N ₂

The first term of the right side is to correct the influence of the tension of the belts 17 and 18, the ambient temperature and the voltage of the commercial power supply 32, and (1-0.35 (V-100) , The voltage correction term of the commercial power supply 32, and V is the voltage (unit is in volts). The second term indicates the change of the number of revolutions of the drum 1 from 500 rpm within 6 seconds. Based on the calculation result, in step 55, the amount of laundry in the drum 1 is determined as shown in (Table 1).

The control means 21 calculates the reference value for determining the unbalance caused by the laundry in the drum 1 as shown in Table 2 in accordance with the amount of the laundry in the drum 1 determined as described above To change.

When the amount of laundry in the drum 1 is large, if there is a slight imbalance caused by the laundry in the drum 1, a large vibration and noise are generated in the dewatering step. When the amount of laundry in the drum 1 is small, Even if there is a slight imbalance caused by the laundry in the washing machine 1, large vibrations and noises are not generated in the dewatering cycle. Therefore, by changing the reference value for judging the unbalance according to the amount of laundry as shown in Table 2, It is possible to suppress vibration and noise in the dewatering process irrespective of the amount.

Since the amount of the laundry in the drum 1 is detected in a state in which the laundry is dried at the start of operation and the amount of laundry in the drum 1 is detected, the amount of laundry can be accurately detected irrespective of the quality of the laundry, Is changed according to the amount of laundry accurately detected, it is possible to suppress vibration and noise in the dewatering stroke.

When the amount of laundry is large, the cleaning rate is generally low in the washing cycle, the rinsing rate is low in the rinsing cycle, and the dehydration rate is low in the spinning cycle. On the contrary, even when the amount of laundry is small, the cleaning rate is generally high in the washing cycle, the rinsing rate is high in the rinsing cycle, and the dehydration rate is high in the spinning cycle. Therefore, when the amount of the laundry is large, the control means 21 sets the washing time to be longer than usual (for example, 20% longer) and increases the number of rinsing times (for example, Alternatively, the rinse time may be lengthened (for example, rinse once for three minutes to four minutes). The rinsing rate, the rinsing rate, and the dehydration rate are set to be larger than usual (for example, usually 800 rpm to 1000 rpm) by setting the dewatering time longer than usual (for example, Can be prevented from being lowered. On the contrary, when the amount of the laundry is small, the control means 21 sets the washing time to be shorter than usual (for example, 20% shorter) and the number of times of rinsing is reduced , The rinse time is shortened (for example, normally, rinse is performed once for three minutes to two minutes). Rinse rate and dehydration rate can be improved by reducing the dewatering time (for example, usually 7 minutes is 5 minutes) or the dewatering revolution number is smaller than usual (for example, 800 rpm is generally 600 rpm) Can be constant.

Next, an operation for determining the unevenness of laundry in the drum 1 for suppressing vibration and noise at the time of the dewatering stroke will be described with reference to Fig.

The first motor 15 is turned on and the number of revolutions of the drum 1 is set to the first number of revolutions N ₁ (53 rpm), and the number of rotations of the first motor 15 15, and controls the first motor 15 by the detection output. The first motor 15 is turned on and off every predetermined time (for example, 8 seconds on and 3 seconds off), and when the time t1 has elapsed, the laundry balancing process is started.

When the time t2 elapses in the laundry balance stroke, the number of revolutions of the drum 1 is raised to the first rising speed (for example, 5 rpm for 1 second), and after the lapse of the time t3, (For example, 2 rpm for 1 second) lower than the first rising speed so that the laundry in the drum 1 is uniformly stuck to the inner wall of the drum 1. [

The speed is the fourth rotation speed N ₄ (150rpm) of the first motor 15 is off, and the drives the second motor 16 in a fully conducting into the first preliminary dewatering stroke, the drum (1) at time t4 It is reached, when the second rotation speed N ₃ (100rpm) for turning off the motor 16, and the drum (1), the first turning on the motor 15, enters the first imbalance determination administration. At this time, the number of revolutions of the drum (1) to a third rotation speed to set to N ₃ (100rpm), by the rotation number detecting means 29 detects the number of revolutions of the first motor 15, a detection output Thereby controlling the first motor 15.

When the time t5 has elapsed, the first motor power switching means 22 is conductive detecting the angle, it is detected by the conduction by fixing each when controlling the number of revolutions of the drum (1) to a third rotation speed N ₃ ( 15). Then, the rotational speed fluctuation width at this time is detected by the rotational speed detecting means 29, and the detected rotational speed fluctuation width is compared with the reference value. At this time, the reference value changes the reference value as indicated in (Table 2) according to the amount of laundry in the drum 1 determined at the start of operation.

When the revolution speed fluctuation reference value or less, the less imbalance of laundry in the drum 1, it is determined that the water receiving tank 3 can be driven with the number number than the rotational high fifth rotation N ₅ corresponding to a vibration resonance point, such as, time t6 The first motor 15 is turned off and the second motor 16 is driven in a completely conductive state to enter the second preliminary dehydration step. When more than the rotation speed fluctuation reference value, it is determined water receptacle tank (3) the number of revolutions corresponding to the resonance point of the vibration, etc. can not be driven at a higher rotation number than the first 5 N _5, it returns to the peeling laundry entanglement stroke.

The second motor 16 is turned off and the number of rotations of the drum 1 is N ₃ (100 rpm) when the rotational speed of the drum 1 reaches the fifth rotational speed N ₅ (500 rpm) , The first motor 15 is turned on and the second unbalance determination stroke is entered.

Second detecting the unbalance determination can in stroke, rotation of the drum (1) rotational speed to a third rotation speed N ₃ to the first motor 15 by the number detecting means (29) is rotated while set to (100rpm) of, and The first motor 15 is controlled by this detection output. Time t7 has elapsed, when, the first motor power switching means (22) interconnecting through detecting the angle, which is detected conduction by fixing each of when the control of the number of revolutions of the drum (1) to a third rotation speed N ₃ ( 15). Then, the rotation number variation width at this time is detected by the rotation number detection means 29. [

Next, when the fluctuation width of the detected rotation number is compared with the reference value, it is determined that the unevenness of the laundry in the drum 1 is small and the vibration and the noise do not increase even when the dehydration process is performed. Then, the process moves to the dehydration process. When the detected fluctuation range of the number of revolutions is equal to or greater than the reference value, it is judged that vibration and noise are increased when the dehydration process is performed, and the laundry returns to the entangling process.

In the present embodiment, the first motor 15 and the second motor 16 are constituted by induction motors, but they may be commutator motors or the like.

In the present embodiment, a description is given of a stroke involving a laundry entanglement unwinding stroke and a second preliminary dehydration stroke, but at least one of the laundry entanglement unwinding stroke and the second preliminary dehydration stroke may be omitted.

(Example 2)

The control means 21 in Fig. 3 is configured such that when the water level detected by the water level detecting means 27 is equal to or higher than a predetermined value (a water level reaching the lower surface of the drum 1, for example, The amount of laundry in the washing machine 1 is not detected. Other configurations are the same as in the first embodiment.

When the water level detecting means 27 detects the water level above a predetermined value, if there is water remaining in the drum 1, or if laundry containing water is put into the drum 1 In any case, the laundry in the drum 1 contains water. In this case, if the amount of water contained in the laundry is different depending on the porosity of the laundry, and the other is different in porcelain, the amount of the laundry can not be accurately detected. Therefore, by not detecting the amount of laundry, it is possible to exclude inaccurate data.

(Example 3)

3 the control means 21 in the, by the second preliminary dewatering stroke before dewatering stroke (see Fig. 4), the drum (1) to the second motor 16, the low number of second rotary than N _2, the powered by 5 revolutions N ₅ (500rpm) and, on the number of revolutions changes in according to the inertia of the drum 1 after the second block a motor 16 (e.g., rotation speed changes in 6 seconds from 450rpm) The amount of laundry in the drum 1 is detected.

At this time, the change in the rotational speed due to the inertia of the drum 1 varies depending on the tension of the belts 17 and 18, the ambient temperature, and the like. Therefore, (For example, a change in the number of revolution after 3 seconds from 200 rpm). Since the change in the number of revolutions of the drum 1 when driven by the second motor 16 is changed by the voltage of the commercial power supply 32, the voltage detection means for detecting the voltage of the commercial power supply 32 Is corrected by the output of the light source (31).

The amount of laundry in the drum 1 detected at the start of washing is corrected by the detected amount of laundry. And the reference value for determining the unbalance is changed in the second unbalance determination stage in accordance with the corrected amount of laundry. Other configurations are the same as in the first embodiment.

The operation will be described with reference to Fig. Since the operation up to the first unbalance determination stroke is the same as the operation of the first embodiment, the description is omitted.

After the time t6 elapses, the first motor 15 is turned off and the second motor 16 is driven to be completely conductive to enter the second preliminary dewatering stroke, the second motor 16 is turned on completely , The number of revolutions N ₀₁ of the drum 1 when three seconds have elapsed after the number of revolutions of the drum 1 has reached 200 rpm is detected and the amount of change ΔN ₁ from 200 rpm (where ΔN ₁ = ΔN ₀₁ - The drum 1 is rotated at a speed of 500 rpm after the second motor 16 is turned off and then 6 seconds have elapsed since the number of rotations of the drum 1 became 450 rpm, detecting the rotational speed N of _02, and the amount of change △ N _{2 (where, △ N 2 = 450 - N} 02) from the storage 450rpm, and calculated by the laundry amount Ga is the index of food.

Ga = 0.75 x (1 - 0.35 (V-100))? N ₁ +? N ₂

The first term of the right side is to correct the influence of the tension of the belts 17 and 18, the ambient temperature and the voltage of the commercial power supply 32, and (1-0.35 (V-100) , The voltage correction term of the commercial power supply 32, and V is the voltage (unit is in volts). The second term indicates the change of the number of revolutions of the drum 1 from 450 rpm within 6 seconds. Based on the result of this calculation, the amount of laundry in the drum 1 is determined as shown in (Table 3).

In the second preliminary dewatering step, water is contained in the laundry, and by detecting the amount of laundry in this state, the amount of laundry can be detected in a state in which it is easily affected by vibration and noise in the dewatering stroke.

Second detecting the unbalance determination can in stroke, rotation of the drum (1) rotational speed to a third rotation speed N ₃ to the first motor 15 by the number detecting means (29) is rotated while set to (100rpm) of, and The first motor 15 is controlled by this detection output. Time t7 has elapsed, when, the first motor power switching means (22) interconnecting through detecting the angle, which is detected conduction by fixing each of when the control of the number of revolutions of the drum (1) to a third rotation speed N ₃ ( 15). Then, the rotation number variation width at this time is detected by the rotation number detection means 29. [

Next, it is determined that the vibration and the noise are not increased even when the variation in the number of revolutions in the drum 1 is small and the dehydration process is performed even when the fluctuation range of the number of revolutions is not more than the reference value. After the lapse of time, the process moves to the dehydration process. At this time, the reference value is changed according to the amount of laundry in the drum 1 containing water determined in the second preliminary dehydration step, as shown in (Table 4).

When the detected fluctuation range of the number of revolutions is equal to or greater than the reference value, it is judged that vibration and noise are increased when the dehydration process is performed, and the process returns to the laundry untangling process.

As described above, according to the present embodiment, in the second preliminary dewatering stroke before the dewatering stroke, the drum 1 is driven by the second motor 16 at a fifth rotation speed N5 lower than the second rotation speed N2, The amount of laundry in the drum 1 is detected by the change in the number of revolutions caused by the inertia of the drum 1 after the motor 16 is shut off and the amount of laundry in the drum 1 detected at the time of start of washing is corrected Therefore, in the second preliminary dewatering process, water is contained in the laundry, and by detecting the amount of the laundry in this state, the amount of the laundry can be detected in a state susceptible to vibration and noise in the dewatering stroke, By correcting the amount of the laundry by the result, the reference value for judging the unbalance can be corrected according to the amount of the laundry detected in the same state as the dehydration stroke.

By changing the dewatering time or the dewatering number of revolutions in accordance with the amount of laundry thus corrected, the dewatering rate can be brought closer to a constant value.

In the present embodiment, a description is given of a stroke including a laundry entanglement unblocking stroke, but there is no need for a laundry thread entrenching stroke.

As described above, according to the first invention of the present invention, there is provided a washing machine comprising: a drum rotatable around a rotary shaft accommodating laundry and disposed in a substantially horizontal direction; a motor for driving the drum; and a control means for controlling the number of revolutions of the motor Wherein the control means drives the motor to increase the number of revolutions of the drum to drive the drum with the number of revolutions when the laundry in the drum is adhered to the inner wall of the drum by centrifugal force, The amount of the laundry in the drum is detected based on the change in the number of revolutions of the drum due to the inertia of the drum and the washing time is changed in accordance with the detected amount of laundry. The amount of laundry can be accurately detected from the change in the number of revolutions caused by the inertia of the drum after shutting off the energization of the motor, Without cleaning may be a constant rate. When the amount of the laundry is small, the amount of power used can be reduced by shortening the washing time, and it is also possible to shorten the washing time by one time.

According to the second aspect of the present invention, the control means corrects the change in the number of revolutions caused by the inertia of the drum by changing the increase in the number of revolutions of the drum when the drum is driven by energizing the motor, The change in the number of revolutions due to the inertia of the drum is corrected by the increase in the number of revolutions of the drum when the drum is driven by energizing the motor, The influence of the tension, the ambient temperature, and the like can be eliminated, and the amount of laundry can be detected with high precision.

According to the third aspect of the present invention, there is provided a voltage detecting means for detecting a voltage of a commercial power supply, wherein the control means controls the voltage detecting means to detect the voltage of the commercial power supply, The influence of the voltage of the commercial power source at the time of correcting the rotational speed can be eliminated by correcting the change in the rise of the rotational speed of the drum by the output of the voltage detecting means, It can be detected well.

According to the fourth aspect of the present invention, the control means detects the amount of the laundry in the drum from the change in the number of rotations caused by the inertia of the drum after cutting off the energization of the motor at the start of washing. The amount of the laundry contained in the laundry is different depending on the amount of water contained in the laundry and the amount of the laundry can not be accurately detected when the different types of the fluids are present in the laundry. It is possible to accurately detect the amount of laundry regardless of the porosity by detecting it in a dry state.

According to a fifth aspect of the present invention, there is provided a water treatment system comprising: a water receiving tank for covering a drum from the outside; and a water level detecting means for detecting a water level of the water receiving tank, wherein the control means controls the water level detecting means The laundry in the drum contains water and the amount of water contained in the three kinds of detergent is different depending on the porosity of the laundry. Therefore, the amount of the laundry in the drum is not detected, , It is impossible to accurately detect the amount of laundry, so that it is possible to exclude inaccurate data by not detecting the amount of laundry.

According to the sixth to fifteenth inventions, as in the first to fifth inventions, the rinsing rate can be made constant.

According to the sixteenth to twentieth and the twenty-sixth to twenty-sixth inventions, the dehydration rate can be made constant as in the first to fifth inventions.

According to the twenty-first and twenty-seventh inventions, the amount of the laundry can be detected in a state in which the laundry is susceptible to vibration and noise in the dewatering stroke by detecting the amount of the laundry in the state of containing water in the laundry, The reference value for judging the unbalance can be corrected in accordance with the amount of laundry detected in the same state as the dehydration stroke. Further, by changing the dehydration time or the dehydration number of revolutions depending on the amount of the cleaned laundry, the dehydration rate can be made closer to a constant value.

Claims (22)

A drum rotatable around a rotating shaft accommodating the laundry and installed in a substantially horizontal direction, A motor for driving the drum, And control means for controlling the number of revolutions of the motor, The control means controls the motor so that the number of revolutions of the drum is increased to drive the drum with the number of revolutions when the laundry in the drum is adhered to the inner wall of the drum by centrifugal force, The amount of laundry in the drum is detected from a change in the number of revolutions caused by the inertia of the drum, and the washing time is changed in accordance with the detected amount of laundry, and the number of revolutions And the amount of laundry in the drum is detected by correcting the change in the number of rotations due to the inertia of the drum by the change of the rising. The method according to claim 1, And voltage detecting means for detecting the voltage of the commercial power supply, Wherein the control means corrects a change in the rotation speed of the drum when the drum is driven by energizing the motor by the output of the voltage detection means. 3. The method according to claim 1 or 2, Wherein the control means detects the amount of the laundry in the drum from a change in the number of revolutions caused by inertia of the drum after cutting off the energization of the motor at the start of washing. The method according to claim 1, A water receiving tank for covering the drum from the outside, And water level detecting means for detecting the water level of the water receiving tank, Wherein the control means does not detect the amount of the laundry in the drum when the water level detected by the water level detecting means is equal to or larger than a predetermined value. A drum rotatable around a rotating shaft accommodating the laundry and installed in a substantially horizontal direction, A motor for driving the drum, And control means for controlling the number of revolutions of the motor, The control means controls the motor so that the number of revolutions of the drum is increased to drive the drum with the number of revolutions when the laundry in the drum is adhered to the inner wall of the drum by centrifugal force, The amount of laundry in the drum is detected based on the change in the number of rotations caused by inertia of the drum and the number of times of rinsing is changed in accordance with the detected amount of laundry and the number of revolutions And the amount of laundry in the drum is detected by correcting the change in the number of rotations due to the inertia of the drum by the change of the rising. 6. The method of claim 5, And voltage detecting means for detecting the voltage of the commercial power supply, Wherein the control means corrects a change in the rotation speed of the drum when the drum is driven by energizing the motor by the output of the voltage detection means. The method according to claim 5 or 6, Wherein the control means detects the amount of the laundry in the drum from a change in the number of revolutions caused by inertia of the drum after cutting off the energization of the motor at the start of washing. 6. The method of claim 5, A water receiving tank for covering the drum from the outside, And water level detecting means for detecting the water level of the water receiving tank, Wherein the control means does not detect the amount of the laundry in the drum when the water level detected by the water level detecting means is equal to or larger than a predetermined value. A drum rotatable around a rotating shaft accommodating the laundry and installed in a substantially horizontal direction, A motor for driving the drum, And control means for controlling the number of revolutions of the motor, The control means controls the motor so that the number of revolutions of the drum is increased to drive the drum with the number of revolutions when the laundry in the drum is adhered to the inner wall of the drum by centrifugal force, The amount of laundry in the drum is detected from the change in the number of rotations caused by the inertia of the drum, the rinsing time is changed in accordance with the detected amount of laundry, and the number of revolutions And the amount of laundry in the drum is detected by correcting the change in the number of revolutions caused by the inertia of the drum by the change of the rising. 10. The method of claim 9, And voltage detecting means for detecting the voltage of the commercial power supply, Wherein the control means corrects a change in the rotation speed of the drum when the drum is driven by energizing the motor by the output of the voltage detection means. 11. The method according to claim 9 or 10, Wherein the control means detects the amount of the laundry in the drum from a change in the number of revolutions caused by inertia of the drum after cutting off the energization of the motor at the start of washing. 10. The method of claim 9, A water receiving tank for covering the drum from the outside, And water level detecting means for detecting the water level of the water receiving tank, Wherein the control means does not detect the amount of the laundry in the drum when the water level detected by the water level detecting means is equal to or larger than a predetermined value. A drum rotatable around a rotating shaft accommodating the laundry and installed in a substantially horizontal direction, A motor for driving the drum, And control means for controlling the number of revolutions of the motor, The control means controls the motor so that the number of revolutions of the drum is increased to drive the drum with the number of revolutions when the laundry in the drum is adhered to the inner wall of the drum by centrifugal force, The amount of laundry in the drum is detected from a change in the number of revolutions caused by the inertia of the drum, and the dehydrating time is changed in accordance with the detected amount of laundry, and the number of revolutions And the amount of laundry in the drum is detected by correcting the change in the number of rotations due to the inertia of the drum by the change of the rising. 14. The method of claim 13, And voltage detecting means for detecting the voltage of the commercial power supply, Wherein the control means corrects a change in the rotation speed of the drum when the drum is driven by energizing the motor by the output of the voltage detection means. The method according to claim 13 or 14, Wherein the control means detects the amount of laundry in the drum from a change in the number of revolutions due to the inertia of the drum after interruption of energization of the motor at the start of washing. 14. The method of claim 13, A water receiving tank for covering the drum from the outside, And water level detecting means for detecting the water level of the water receiving tank, Wherein the control means does not detect the amount of the laundry in the drum when the water level detected by the water level detecting means is equal to or larger than a predetermined value. The method according to claim 13 or 14, The control means performs preliminary dewatering at a rotational speed lower than the dewatering rotational speed before dewatering and detects the amount of the laundry in the drum from a change in the rotational speed due to inertia of the drum after interruption of energization of the motor at the time of preliminary dewatering And corrects the amount of laundry in the drum detected at the start of washing. A drum rotatable around a rotating shaft accommodating the laundry and installed in a substantially horizontal direction, A motor for driving the drum, And control means for controlling the number of revolutions of the motor, The control means controls the motor so that the number of revolutions of the drum is increased to drive the drum with the number of revolutions when the laundry in the drum is adhered to the inner wall of the drum by centrifugal force, The amount of laundry in the drum is detected from the change in the number of revolutions caused by the inertia of the drum, and the number of revolutions of the drum when the drum is driven by energizing the motor is changed in accordance with the detected amount of laundry. And the amount of laundry in the drum is detected by correcting the change in the number of revolutions caused by the inertia of the drum. 19. The method of claim 18, And voltage detecting means for detecting the voltage of the commercial power supply, Wherein the control means corrects a change in the rotation speed of the drum when the drum is driven by energizing the motor by the output of the voltage detection means. 20. The method according to claim 18 or 19, Wherein the control means detects the amount of the laundry in the drum from a change in the number of revolutions caused by inertia of the drum after cutting off the energization of the motor at the start of washing. 19. The method of claim 18, A water receiving tank for covering the drum from the outside, And water level detecting means for detecting the water level of the water receiving tank, Wherein the control means does not detect the amount of the laundry in the drum when the water level detected by the water level detecting means is equal to or larger than a predetermined value. 20. The method according to claim 18 or 19, The control means performs preliminary dewatering at a rotational speed lower than the dewatering rotational speed before dewatering and detects the amount of the laundry in the drum from a change in the rotational speed due to inertia of the drum after interruption of energization of the motor at the time of preliminary dewatering And corrects the amount of laundry in the drum detected at the start of washing.