JP2016129534A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine which prevents deviation and entanglement of laundry, and which has improved the finish.SOLUTION: In a washing step and a rinsing step, in the case where an output value of current detection means 21 is equal to or greater than a predetermined value, it is determined that deviation and entanglement of laundry have occurred in a washing tub 3, and water is supplied to a predetermined water level in the washing tub 3 by operating a water supply valve 6, and the washing tub 3 or an agitation vane 2 is rotated by driving a motor 4 until the output value of the current detection means 21 becomes equal to or less than the predetermined value. Thus, the laundry in the washing tub 3 floats, a load with respect to the laundry is alleviated, the deviation and entanglement are mitigated, and the finish of the laundry can be improved.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a washing machine that performs washing, rinsing, and dehydration processes.

  Conventionally, in this type of washing machine, when there is a deviation or entanglement of the laundry in the washing tub during the washing process or the rinsing process, the deviation or entanglement of the laundry is detected by the driving current of the motor. The structure which controls a stroke is proposed (for example, refer to patent documents 1).

  FIG. 3 shows a block circuit diagram of a conventional washing machine described in Patent Document 1. As shown in FIG.

  In FIG. 3, a direct current E is applied to the motor drive circuit 41. The motor drive circuit 41 is switched by the motor drive signal of the microcomputer 47, outputs the motor drive current I according to the motor drive signal, and DC brass. The motor 42 which is a less motor is rotationally driven. Then, the position of the motor 42 is detected by the position detection circuit 46, and a motor drive signal is output from the microcomputer 47.

  When the motor 42 is driven, the motor drive current I flows through the current detection resistor 43. When the voltage of the current detection resistor 43 drops, the current detection circuit 44 detects the motor drive current I, stores the value, and compares the current. It is incorporated in the microcomputer 47 constituting the comparison means.

  With the above configuration, when the laundry is offset or entangled during washing or rinsing or at the end of washing or rinsing, the rotational resistance of the stirring blade (not shown) increases and flows to the motor 42. The motor drive current I increases. That is, the current value varies depending on the amount of laundry and the degree of entanglement.

  Therefore, the motor driving current that flows to the motor 42 at the initial stage of washing or rinsing is compared with the current that flows to the motor 42 during washing or rinsing, or at the end of washing or rinsing, and the amount of tangling or entanglement of the laundry is compared. Is detected. Based on the detection result, when the laundry is slightly skewed or entangled, the loosening stirring time of the laundry with the shorter reversal time is longer than the reversal time of washing or rinsing, and conversely, the laundry is skewed or entangled. When is small, control is performed to shorten the loosening and stirring time of the laundry in the inversion time shorter than the inversion time of washing or rinsing.

JP-A-6-134176

  However, in the above-described conventional configuration, when the misalignment or entanglement of the laundry in the washing tub is detected, the laundry is loosened and stirred for a long time, so that the laundry is easily damaged. In addition, there is a problem that the total operation time is increased, unnecessary power is consumed, and noise and vibration are generated by stirring the laundry.

  The present invention solves the above-mentioned conventional problems, and when there is a deviation or entanglement of the laundry in the laundry tub, water is supplied to increase the amount of water, and the laundry in the laundry tub is floated and operated. Therefore, an object of the present invention is to provide a washing machine capable of suppressing the displacement and entanglement of the laundry.

  In order to solve the conventional problems, a washing machine according to the present invention includes an outer tub that is supported in an anti-vibration manner inside a housing, a washing tub that is rotatably provided in the outer tub, and a rotating inner tub of the washing tub. An agitating blade provided freely, a motor for driving the washing tub and the agitating blade, a water supply means for supplying water into the washing tub, a current detection means for detecting a current flowing through the motor, the water supply means, a motor, etc. And control means for sequentially controlling a series of steps of washing, rinsing and dehydration, the control means in the washing step and the rinsing step, when the output value of the current detection means is a predetermined value or more, It is determined that the laundry in the washing tub is deviated or entangled, the water supply means is operated to supply water into the washing tub to a predetermined water level, and the output value of the current detection means becomes a predetermined value or less. Drive the motor until the washing tub also Ku is obtained by a configuration in which rotation of the stirring blade.

  As a result, it is possible to alleviate the displacement and entanglement of the laundry.

  The washing machine according to the present invention can alleviate the misalignment and entanglement of the laundry without damaging the laundry due to excessive stress and without consuming unnecessary power by extending the operation time.

The longitudinal cross-sectional view of the washing machine in embodiment of this invention Block diagram of the washing machine Block diagram of a conventional washing machine

  According to a first aspect of the present invention, there is provided an outer tub that is supported in a vibration-proof manner inside the housing, a washing tub that is rotatably provided in the outer tub, an agitating blade that is rotatably provided at the inner bottom of the washing tub, and the washing tub. And a motor for driving the agitating blade, a water supply means for supplying water into the washing tub, a current detection means for detecting a current flowing through the motor, a series of washing, rinsing and dehydration by controlling the water supply means, the motor, etc. Control means for sequentially controlling the strokes of the laundry, and in the washing stroke and rinsing stroke, when the output value of the current detection means is greater than or equal to a predetermined value, the control means It is determined that entanglement has occurred, the water supply means is operated to supply water into the washing tub to a predetermined water level, and the motor is driven until the output value of the current detection means falls below a predetermined value, and the washing tub Or the structure which rotates the said stirring blade By, laundry washing and dewatering in the water tank floats, load on the laundry is reduced, so that the Katayose rear entanglement is alleviated. As a result, the stress on the laundry is reduced, the damage, noise and vibration of the laundry are reduced, and the finish of the laundry can be improved.

  In the second invention, in particular, the control means of the first invention is configured such that when the output value of the current detection means is equal to or greater than a predetermined value in the washing process and the rinsing process, the water supply means is operated to set the predetermined water level in the washing tub. When the output value of the current detection means does not fall below a predetermined value within a predetermined time, the output value of the current detection means is a predetermined value. Until it becomes below, the water supply means and the motor are driven to rotate the washing tub or the stirring blade, so that the laundry in the washing and dewatering tub floats and the load on the laundry is reduced. , The offset and entanglement will be alleviated. As a result, the stress on the laundry is reduced, the damage, noise and vibration of the laundry are reduced, and the finish of the laundry can be improved.

Hereinafter, embodiments of the invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention, and FIG. 2 is a block circuit diagram of the washing machine.

  1 and 2, the casing 8 suspends the outer tub 1 by a plurality of suspensions 9 and supports it in a vibration-proof manner. The washing / dehydrating shaft 10 is hollow and has a biaxial structure.

  The washing tub 3 rotatably included in the outer tub 1 has a number of dewatering holes (not shown) on the side wall, a fluid balancer 11 for vibration reduction at the top of the inner periphery, and a central bottom portion. A stirring blade 2 for stirring clothes is provided.

  The transmission mechanism unit 12 has a reduction gear (not shown) for washing inside. The motor 4 is attached to the outer bottom portion of the outer tub 1 and rotates the stirring blade 2 and the washing tub 3 via the transmission mechanism portion 12.

  An upper frame 13 is arranged on the upper part of the housing 8, and an operation display unit 14 for performing various input settings and displaying setting contents is arranged on the front of the upper frame 13. The control device 7 is accommodated inside the operation display unit 14. The control device 7 includes a current detection means 21 that detects a drive current of the motor 4, a water supply valve 6 that is a water supply means, the motor 4, A control means 20 is provided for controlling the drain valve 5 and the like and sequentially controlling a series of steps of washing, rinsing and dehydration.

  A water supply valve 6 is attached to the inside of the rear part of the upper frame 13, and is appropriately introduced into the washing tub 3 through a water injection hose 15 and an outer tub cover 16 that covers the upper opening edge of the outer tub 1 in a watertight manner. Supply water.

  In addition, a clothing input port 17 is formed in a substantially central portion of the upper frame body 13, and a lid 18 is provided so as to be openable and closable so as to cover the clothing input port 17.

  The drain valve 5 is provided in the lower part of the outer tub 1, and drains the washing water in the outer tub 1 and the washing tub 3 to the outside by opening and closing.

  In addition, an overflow port (not shown) is provided at the upper side of the side wall of the outer tub 1, and before the water overflows from the upper surface to the floor surface, it flows out from the overflow port to the overflow path (not shown), The water is drained outside the machine without going through the drain valve 5.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the lid 18 is opened, the laundry is put into the washing tub 3, and the washing operation is started, the control device 7 controls the water supply valve 6 to supply the washing water to the predetermined water level in the washing tub 3. To do. Thereafter, the control device 7 drives the motor 4 to rotate the washing tub 3 or the stirring blade 2 so that the laundry and water in the washing tub 3 are stirred. Next, the supplied wash water is drained by operating the drain valve 5. Thereafter, the stirring blade 2 and the washing tub 3 are operated simultaneously, and the rotational speed is gradually increased to perform dehydration. This is repeated, and a series of steps of washing, rinsing and dehydration are sequentially performed.

  This is the basic flow of the process, and the washing in the washing tub 3 is performed during the stirring process of the washing process and the rinsing process depending on the type, amount, and water level of the laundry, especially in the middle to the final stage of the stirring process. Misalignment or entanglement of objects may occur.

During the washing and rinsing, if the laundry in the washing tub 3 is deviated or entangled, the outer tub 1 suspended in the housing 8 is greatly shaken and hits the housing 8 in the worst case. Problems such as noise may occur.

  When the laundry is offset or entangled, the torque load applied to the motor 4 increases. During the stroke operation, the drive current of the motor 4 is constantly detected, and the drive current increases as the torque load increases, and the output of the current detection means 21 increases. Based on the signal from the current detection means 21, the control means 20 detects whether or not the laundry in the laundry tub 3 is offset or entangled, and the laundry in the laundry tub 3 has a predetermined degree of deviation or entanglement. Is exceeded, that is, when the output value of the current detection means 21 is equal to or higher than a predetermined value, the water supply valve 6 is operated to supply water into the washing tub 3, and the water level in the washing tub 3 is washed. The water level is increased to a predetermined level higher than the water level, the motor 4 is driven at that level, and the washing tub 3 or the stirring blade 2 is rotated for a predetermined time.

  Thereby, the laundry in the washing tub 3 floats, the load with respect to the laundry is reduced, and the deviation and entanglement of the laundry are alleviated. As a result, stress on the laundry is reduced, damage to the laundry is reduced, and noise and vibration are also reduced.

  In the unlikely event that the output value of the current detection means 21 does not fall below the predetermined value within a predetermined time, and the laundry has been displaced or entangled, the water supply valve 6 again causes The washing water is supplied to the washing tub 3 so that the laundry in the washing tub 3 is further floated, and the washing tub 3 or the agitating blade 2 is rotated so as to alleviate the slack and entanglement of the laundry. This operation is performed until the deviation or entanglement of the laundry is completely relieved, that is, until the output value of the current detection means 21 becomes a predetermined value or less. Finally, the washing tub 3 or the stirring blade 2 is rotated while water is overflowing from the overflow port of the outer tub 1 until the output value of the current detection means 21 becomes a predetermined value or less.

  As described above, in the present embodiment, in the washing process and the rinsing process, when the output value of the current detection means 21 is greater than or equal to a predetermined value, the laundry in the washing tub 3 is offset or entangled. Then, the water supply valve 6 is operated to supply water into the washing tub 3 to a predetermined water level, and the motor 4 is driven until the output value of the current detection means 21 becomes a predetermined value or less, so that the washing tub 3 or the stirring blade 2 is moved. By rotating, the laundry in the washing tub 3 floats, the load on the laundry is reduced, and the deviation and entanglement are alleviated. As a result, the stress on the laundry is reduced, the damage, noise and vibration of the laundry are reduced, and the finish of the laundry can be improved.

  Further, in the washing process and the rinsing process, when the output value of the current detection means 21 is equal to or greater than a predetermined value, the water supply valve 6 is operated to supply water into the washing tub 3 to a predetermined water level, and the motor 4 is driven to perform washing. When the tank 3 or the stirring blade 2 is rotated, and the output value of the current detection means 21 does not become a predetermined value or less within a predetermined time, the water supply valve 6 and the motor are kept until the output value of the current detection means 21 becomes a predetermined value or less. By driving 4 and rotating the washing tub 3 or the agitating blade 2, the laundry in the washing tub 3 floats, the load on the laundry is reduced, and the deviation and entanglement of the laundry are alleviated. become. As a result, the stress on the laundry is reduced, the damage, noise and vibration of the laundry are reduced, and the finish of the laundry can be improved.

  As described above, the washing machine according to the present invention detects the driving current flowing in the motor, thereby detecting whether or not the laundry is offset or entangled, increasing the water level and floating the laundry. Since it is possible to alleviate the deviation and entanglement of the object, it can be applied to other washing machine uses such as a drum type.

DESCRIPTION OF SYMBOLS 1 Outer tub 2 Agitation blade 3 Washing tub 4 Motor 6 Water supply valve 8 Case 20 Control means 21 Current detection means

Claims (2)

An outer tub that is supported in a vibration-proof manner inside the housing, a washing tub that is rotatably provided in the outer tub, an agitating blade that is rotatably provided at the inner bottom of the washing tub, and the washing tub and the agitating wing are driven. The motor, the water supply means for supplying water into the washing tub, the current detection means for detecting the current flowing through the motor, the water supply means, the motor, etc. are controlled, and a series of steps of washing, rinsing and dewatering are sequentially controlled. Control means, and the control means determines in the washing process and the rinsing process that when the output value of the current detection means is equal to or greater than a predetermined value, the laundry in the washing tub is deviated or entangled. Then, the water supply means is operated to supply water into the washing tub to a predetermined water level, and the motor is driven until the output value of the current detection means becomes a predetermined value or less to rotate the washing tub or the stirring blade. A washing machine to operate. In the washing process and the rinsing process, the control means operates the water supply means to supply water to the predetermined water level in the washing tub when the output value of the current detection means is equal to or higher than the predetermined value, and drives the motor to drive the washing tub. Alternatively, when the stirring blade is rotated and the output value of the current detection means does not become a predetermined value or less within a predetermined time, the water supply means and the motor are driven until the output value of the current detection means becomes a predetermined value or less. The washing machine according to claim 1, wherein the washing tub or the stirring blade is rotated.

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