JP2018023499A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of performing braking of tub rotation stably.SOLUTION: A washing machine includes: an inner tub provided in a housing; an agitation blade provided at a bottom part in the inner tub; a drive motor for driving a washing tub and the agitation blade; a lid opened/closed when laundry is put in/taken out from the inner tub; a lid opening/closing switch for restricting the rotation of the lid; and a control device for controlling the inner tub, the agitation blade, the drive motor and the lid opening/closing switch. The control device extends brake time Tb at the end of a dewatering operation based on the number of times of the washing operation Tc.SELECTED DRAWING: Figure 13

Description

  The present invention particularly relates to a washing machine that performs brake control at the end of dehydration.

  In a conventional washing machine, the brake operation time after the completion of dehydration is determined by the amount of laundry (see Patent Document 1).

Japanese Patent Laid-Open No. 4-40997

  However, the washing machine described in Patent Document 1 does not consider the washing operation cycle, and there is a problem that the brake itself is worn out during repeated use of the washing operation, and the braking of the tank rotation becomes insufficient. It was. For this reason, at the end of dehydration, the rotation of the tub may continue when the lid that is opened and closed when the laundry is taken in and out is opened.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a washing machine capable of stably performing tank rotation braking.

  The present invention includes a washing tub provided in a housing, an agitating blade provided at a bottom of the washing tub, a driving device for driving the washing tub and the agitating wing, and a laundry to / from the washing tub A lid that opens and closes when the lid is opened, a lid opening / closing switch that restricts rotation of the lid, a control device that controls the washing tub, the stirring blade, the driving device, and the lid opening / closing switch. The apparatus is characterized in that the brake time is changed based on the number of washing operations at the end of the dehydration operation.

  ADVANTAGE OF THE INVENTION According to this invention, the washing machine which can perform braking of tank rotation stably can be provided.

It is an external appearance perspective view which shows the washing machine of this embodiment. It is a longitudinal cross-sectional view of the washing machine of this embodiment. It is a perspective view which shows an outer tank bottom part outer side. It is a top view which shows an outer tank bottom part outer side. The schematic diagram explaining the interlocking operation | movement of a clutch mechanism and a drain valve is shown, (a) is at the time of washing, (b) is at the time of dehydration. It is a figure which shows the function structure of the control apparatus of the washing machine of this embodiment. It is the schematic which shows the path | route of the water supply unit of the washing machine of this embodiment. It is an expanded sectional view of a fluid balancer. It is a flowchart which shows a tank cleaning process. It is a flowchart which shows detergent amount sensing and a water supply process. It is a flowchart which shows the sensing process at the time of a rinse. It is a flowchart which shows dehydration process retry. It is a flowchart which shows a dehydration brake process. (A) is a table showing motor off and brake time according to the tank rotation speed, (b) is brake addition time according to the driving cycle, (c) is brake addition time according to the detergent amount sensing rank, and (d) is This is the brake addition time according to the amount of laundry. It is a graph which shows the change of a tank rotational speed.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate.

FIG. 1 is an external perspective view showing the washing machine of the present embodiment.
As shown in FIG. 1, the washing machine 1 includes a housing 2 constituting an outer shell and a lid 3 that is opened and closed when the laundry is taken in and out. The casing 2 includes a base 2a made of synthetic resin at the bottom, a side plate 2b made of steel plate provided on the top of the base 2a, a top cover 2c made of synthetic resin provided on the top of the side plate 2b, and the like. . The lid 3 is composed of a single rectangular plate, and is rotatably supported by a bearing (not shown) provided on the top cover 2c. The top cover 2c is provided with an operation panel 4 in front of the lid 3 when it is closed. The operation panel 4 includes operation switches and a display unit. Moreover, the water supply hose connection port 5 is provided in the rear part of the top cover 2c.

FIG. 2 is a longitudinal sectional view of the washing machine of the present embodiment.
As shown in FIG. 2, the washing machine 1 includes an inner tub 10, an outer tub 20, a stirring blade 30, a drive motor (drive device) 40 (see FIG. 3), and a clutch mechanism 50 (see FIG. 3). ), A drain valve 62 (see FIG. 3), a control device 100 (see FIG. 6), and the like.

  The inner tub 10 is a washing / dehydrating tub, has a bottomed cylindrical shape, and includes a body plate 11, a bottom plate 12 provided at the bottom of the body plate 11, a fluid balancer 13 provided at the top of the body plate 11, and the like. It is configured.

  The body plate 11 is formed in a cylindrical shape by a stainless steel plate, for example. The body plate 11 is formed with a large number of through holes (not shown) for water passage.

  For example, the bottom plate 12 is formed in a dish shape from a synthetic resin. The bottom plate 12 has a circular opening for attaching the stirring blade 30.

  The fluid balancer 13 is configured by enclosing a fluid having a large specific gravity therein, and cancels the eccentricity due to the movement of the fluid in the fluid balancer 13 when the eccentricity occurs due to the unevenness of the laundry when the inner tub 10 rotates. And maintaining the balance of rotation. In addition, the fluid balancer 13 is attached to the upper end portion of the body plate 11 so as to be substantially concentric with the rotation axis center of the inner tank 10.

  The liquid sealed in the fluid balancer 13 is stored in the storage portion 13a. The interior of the accommodating portion 13 a is divided into a plurality of layers in the radial direction from the center of the fluid balancer 13. The inside of each layer is divided into a number of rooms, and each room communicates so that the liquid to be sealed can move.

  A circulation shower case 14 for circulating wash water and rinsing water supplied to the outer tub 20 by a pump-up action caused by rotation of the stirring blade 30 on the side surface of the inner peripheral surface of the body plate 11 of the inner tub 10. 14 is provided. The circulation shower case 14 is provided with a lint filter case 15 for collecting lint.

  The outer tub 20 is made of a synthetic resin and formed in a bottomed cylindrical shape, and encloses the inner tub 10 on the same axis. In addition, an outer tank cover 21 that covers a gap between the outer tank 20 and the inner tank 10 is provided at the upper end of the outer tank 20.

  The stirring blade 30 (also referred to as a pulsator) is formed in a substantially disk shape and is provided at the bottom of the inner tank 10. Further, the stirring blade 30 has a surface (upper surface) formed in a wave shape along the circumferential direction, and has raised portions 31 and 31 that rise upward. The agitating blade 30 is formed with a large number of through holes 32 penetrating in the vertical direction.

  In addition, a plurality of back blades 33 (radial ribs) extending in the radial direction from the center of the rotation axis are formed on the back surface (lower surface) of the stirring blade 30. The back blade 33 is formed to have the highest height in the region of the raised portion 31. Further, the back blade 33 has a plate shape and is formed so as to protrude downward from the back surface of the stirring blade 30 in the vertical direction. Further, the back blades 33 are arranged radially at intervals in the circumferential direction. The back blade 33 has not only a function of taking in the washing water to be circulated, but also a function as a reinforcing member that suppresses the laundry from being poured into the inner tub 10 and the stirring blade 30 being bent and deformed.

  Further, on the back surface (lower surface) of the stirring blade 30, annular ribs 34, 34, 34 (circumferential ribs) are formed concentrically or substantially concentrically around the rotation axis. Thereby, the stirring blade 30 and the back blade | wing 33 can be reinforced. The annular rib 34 is also a member constituting the back blade, and water is accommodated in a region surrounded by the back blade 33 and the annular rib 34, and the water accommodated by the centrifugal force when the stirring blade 30 rotates is moved outward. Extrude.

  Further, the stirring blade 30 is configured such that the rotational power from the drive motor 40 (see FIG. 3) is transmitted. For example, at the time of washing and rinsing, the washing blade and the rinsing water can be stirred together with the laundry by rotating the stirring blade 30 in the forward and reverse directions. The water contained in the laundry can be centrifugally dehydrated by rotating at.

FIG. 3 is a perspective view showing the outer side of the outer tank bottom, and FIG. 4 is a plan view showing the outer side of the outer tank bottom. 3 shows a state in which the bottom of the outer tub 20 faces upward, and FIG. 4 shows a state seen from the bottom of the washing machine.
As shown in FIGS. 3 and 4, a drive motor 40, a clutch mechanism 50, a drainage device 60, and an interlocking mechanism 70 are provided on the bottom side of the outer tub 20.

  The drive motor 40 is an electric motor (motor) that selectively provides rotational power to the inner tank 10 (see FIG. 2) and the stirring blade 30 (see FIG. 2). 3). At the time of washing and rinsing in the washing process, the driving force from the driving motor 40 is transmitted only to the stirring blade 30 (see FIG. 2), and at the time of dehydration, the driving force from the driving motor 40 is transferred to the inner tub 10 (see FIG. 2). Communicated. A small-diameter pulley 41 is fixed to the output shaft 40 a of the drive motor 40.

  The clutch mechanism 50 switches between a first state in which the inner tub 10 (see FIG. 2) and the drive motor 40 are connected, and a second state in which the stirring blade 30 (see FIG. 2) and the drive motor 40 are connected. Is possible. A pulley 51 having a larger diameter than the pulley 41 is fixed to the rotating shaft 50 a of the clutch mechanism 50. An endless belt (not shown) is wound around the pulley 41 of the drive motor 40 and the pulley 51 of the clutch mechanism 50. Thereby, the driving force of the drive motor 40 is configured to be transmitted to the inner tank 10 or the stirring blade 30 via the pulley 51.

  The drainage device 60 discharges the water accumulated at the bottom of the outer tub 20 to the outside of the machine, and includes a drainage duct 61 and a drainage valve 62.

  In the drainage duct 61, a joint 61a that communicates with the bottom of the outer tub 20 is formed at an upstream end, and a joint 61b that has a downstream end facing downward in the vertical direction is formed. The joint 61b is connected to one end of a bellows-like drainage hose (not shown).

  The drain valve 62 is provided in the middle of the channel of the drain duct 61, and the channel is opened and closed by a valve motor 73 described later. The valve motor 73 is constituted by a direct motor, and the drain valve 62 is closed by turning off (not energizing) the valve motor 73, and the drain valve 62 is opened by turning on (energizing) the valve motor 73. .

  The interlocking mechanism 70 includes a connecting bar 71 and a brake lever 72.

  The connecting bar 71 is disposed between the drain valve 62 and the valve motor 73, one end in the longitudinal direction is connected to the drain valve 62, and the other end is connected to the valve motor 73 via a wire 74.

  The brake lever 72 connects the clutch mechanism 50 and the connection bar 71, and the base end is rotatably connected to a brake band 53 provided in the housing 52 of the clutch mechanism 50. Further, the brake lever 72 extends in a horizontal direction from the housing 52 and is formed in an L shape so as to be bent at a right angle at the position of the connecting bar 71 (see FIG. 3).

  A switch lever 75 is connected to the brake lever 72. The switching lever 75 switches so that the stirring blade 30 is rotated during washing and the inner tank 10 is rotated during dehydration. The switching lever 75 is configured to operate in conjunction with the operation of the brake lever 72, and the tip (upper end) is engaged with a gear 76 provided between the pulley 51 and the housing 52.

  By energizing the valve motor 73, the wire 74 is pulled, the connecting bar 71 is drawn toward the valve motor 73, and the drain valve 62 is opened. At that time, in the clutch mechanism 50, the distal end of the switching lever 75 is separated from the gear 76 in conjunction with the operation of the connecting bar 71, so that the rotating operation of the inner tank 10 is permitted.

5A and 5B are schematic views for explaining the interlocking operation of the clutch mechanism and the drain valve. FIG. 5A is a time of washing, and FIG. 5B is a time of dehydration.
As shown to Fig.5 (a), the drain valve 62 is provided with the valve body 62a, the shaft 62b, and the coil spring 62c. The valve body 62a has a shape and material that slides in a watertight manner in the drainage duct 61, and has a hollow portion 62d therein. The shaft 62b has a proximal end coupled to the coupling bar 71 and a distal end fixed in the hollow portion 62d. The coil spring 62c is arranged in the hollow portion 62d, and is configured such that a biasing force that biases the valve body 62a in the closing direction acts.

  In the housing 52 of the clutch mechanism 50, the rotating shaft 10a of the inner tank 10 (see FIG. 2) is inserted in the direction perpendicular to the paper surface. Further, a rotating shaft 30a fixed to the stirring blade 30 (see FIG. 2) is inserted inside the rotating shaft 10a.

  A brake band 53 that restricts the rotation of the rotary shaft 10a is wound around the rotary shaft 10a in the housing 52. Although not shown in the drawings, a clutch is provided between the rotating shaft 10a and the brake band 53, and the rotating shaft 10a is braked when the brake band 53 tightens the clutch. Has been.

  At the time of washing shown in FIG. 5A, the brake band 53 is wound in close contact with the periphery of the rotating shaft 10a, and the rotating operation of the rotating shaft 10a (inner tank 10) is restricted. Further, at the time of washing, the stirring blade 30 and the drive motor 40 are connected to each other, and the driving force from the drive motor 40 is transmitted to the stirring blade 30 through the rotating shaft 30a so that the stirring blade 30 can be rotated. It has become. At this time, the switching lever 75 (see FIG. 3) meshes with the gear 76 (see FIG. 3), and the rotation operation of the rotating shaft 10a is restricted. Further, at the time of washing, the energization of the valve motor 73 is off, and the drain valve 62 is closed by the urging force of the coil spring 62c. Thus, when the washing machine 1 is washed, the rotation of the inner tub 10 is restricted and the drain valve 62 is closed.

  The base end of the brake lever 72 is rotatably connected to the brake band 53, and the tip is connected to the middle of the connecting bar 71 in the longitudinal direction.

  At the time of dehydration shown in FIG. 5B, the valve motor 73 is energized and the connecting bar 71 is pulled through the wire 74, so that the contact plate 71a provided on the connecting bar 71 contacts the brake lever 72, The brake lever 72 is tilted. As a result, the brake band 53 spreads, and a clearance is formed between the brake band 53 and the rotary shaft 10a, so that the restriction on the rotational operation of the rotary shaft 10a is released. Further, at this time, the switching lever 75 (see FIG. 3) is separated from the gear 76 (see FIG. 3), thereby allowing the rotating shaft 10a to rotate. During dehydration, the rotary shaft 10a and the rotary shaft 30a are locked to each other, and the inner tank 10 and the stirring blade 30 rotate together. At the time of dehydration, the drain valve 62 opens against the urging force of the coil spring 62c. Thus, when the washing machine 1 is dehydrated, the inner tub 10 is allowed to rotate and the drain valve 62 is open.

FIG. 6 is a diagram illustrating a functional configuration of the control device of the washing machine according to the present embodiment.
As shown in FIG. 6, the control device 100 is configured around a microcomputer 110. The microcomputer 110 includes an operation pattern database 111, a stroke control unit 112, a rotation speed calculation unit 113, a clothing weight calculation unit 114, and the like.

  The microcomputer 110 has a function of calling an operation pattern corresponding to an operation course input from an operation switch of the operation panel 4 (see FIG. 1) and starting a predetermined fully automatic washing course or washing, rinsing and dehydration.

  The stroke control unit 112 has a function of controlling the operation of each of the washing process, the rinsing process, the dehydration process, and the tank cleaning process based on the operation pattern called from the operation pattern database 111. In each stroke, the stroke control unit 112 has a function of driving and controlling the water supply unit 16, the drain valve 62, the valve motor 73, the clutch mechanism 50, and the like via drive circuits. Further, the stroke control unit 112 has a function of controlling the lid opening / closing switch 70. The lid opening / closing switch 70 can regulate the opening operation of the lid 3 according to the control of the stroke control unit 112 (the lid is locked), and maintains the regulation of the opening operation of the lid 3 even when the washing machine 1 is turned off. can do. Further, when the restriction on the opening operation of the lid 3 is released, the control of the stroke control unit 112 is also followed.

  The rotation speed calculation unit 113 has a function of calculating the rotation speed of the drive motor 40 based on the detection value from the rotation detection device 28 that detects the rotation of the drive motor 40.

  The clothing weight calculation unit 114 has a function of calculating the weight of clothing in the inner tub 10 based on the rotation speed calculated by the rotation speed calculation unit 113 and the detection value of the motor current detection device 29. As the weight of the clothes increases, the load for rotating the inner tub 10 increases, and a large amount of motor current flows through the drive motor 40. Therefore, the weight of the clothes is determined by the motor current and the rotation speed of the drive motor 40. Can be calculated.

FIG. 7 is a schematic diagram illustrating a path of a water supply unit of the washing machine according to the present embodiment.
As shown in FIG. 7, the water supply unit 16 includes an outer tank water supply electromagnetic valve 16a and a finishing agent / tank washing water supply electromagnetic valve 16b, and communicates with the water supply paths 16c and 16d. Each water supply electromagnetic valve 16a, 16b is connected from a water tap via a hose or the like, and controls the amount of water supply and the timing of water supply by opening and closing the valve.

  The water supplied by opening the outer tank water supply electromagnetic valve 16a is supplied into the outer tank 20 from the main water inlet 16e through the water supply path 16c. Water that has flowed out of the tank cleaning water supply chamber through the finishing agent / tank cleaning water supply electromagnetic valve 16b is supplied from the water supply port 16f through the water supply path 16d to the water reservoir Q formed at the upper portion of the fluid balancer 13 described later. Is done. Further, the water that is supplied by opening the finishing agent / tank washing water supply electromagnetic valve 16b and flows out of the finishing agent storage chamber passes through the water supply path 16c and the main water injection port 16e in the same manner as the water supplied from the outer tank water supply electromagnetic valve 16a. Water is fed into the outer tub 20.

FIG. 8 is an enlarged cross-sectional view of the fluid balancer.
As shown in FIG. 8, the fluid balancer 13 includes a main body portion 13b in which a plurality of concave portions are arranged in the radial direction in a cross-sectional view, and a lid portion 13c that closes an upper surface opening of the main body portion 13b. ing.

  The lid portion 13c is formed such that the upper surface 13c1 corresponding to the radially outer accommodating portion 13a1 is lower in the vertical direction than the upper surface 13c2 corresponding to the radially inner accommodating portion 13a2. A rib 13d protruding upward is formed at the outer peripheral end of the lid portion 13c, and the rib 13d is formed in an annular shape in the circumferential direction. Accordingly, a water reservoir portion Q having a quadrangular concave shape in cross section is formed by the wall surface 13c3 at the boundary between the upper surface 13c1 and the upper surface 13c2, the upper surface 13c1, and the inner wall surface 13d1 of the rib 13d.

  The water reservoir Q is used for cleaning the tank. Water is stored in the water reservoir Q in a state where the rotation of the inner tank 10 is stopped. Water in the reservoir Q is blown off radially outward (on the inner peripheral wall 20s side of the outer tub 20) by centrifugal force. The water blown to the inner peripheral wall 20s of the outer tub 20 flows down the inner wall surface by the action of gravity, whereby the inner peripheral wall 20s of the outer tub 20 is washed. Further, during the period from when the inner tub 10 starts to rotate until it reaches a rotation speed at which water can be blown to the inner wall surface of the outer tub 20, it overflows from the water reservoir Q by the action of centrifugal force and flows into the fluid balancer. The outer peripheral wall surface of the inner tub 10 is washed by flowing down the outer peripheral wall 13s of 13 and the outer peripheral wall 11s of the body plate 11.

  The water reservoir Q is formed such that the height dimension H1 of the rib 13d is lower than the height dimension H2 of the wall surface 13c3 (H2> H1). With this height relationship, when water is stored in the water reservoir Q, the water overflows from the rib 13d side having a low height first, so that the water overflows inside the inner tank 10. Can be prevented. Thereby, at the time of tank cleaning, it can prevent that water flows into the inner tank 10, and it can prevent that cleaning water is used wastefully.

  FIG. 9 is a flowchart showing the tank cleaning process. FIG. 9 starts when the tank cleaning is started. For example, the washing process, the first rinsing process, the second rinsing process (final rinsing process), the tank cleaning process, and the dehydrating process are performed in this order.

  As shown in FIG. 9, the control device 100 determines whether or not the water level in the outer tub 20 is equal to or lower than a predetermined water level (predetermined water level) S in step S101. The water level is detected by the water level detection device 6 (see FIG. 6). In addition, the water level detection apparatus 6 can be suitably selected from a pressure-sensitive type. Further, the predetermined water level S is set to a water amount that can be drained at a predetermined time t2 (see step S108 described later) necessary for tank cleaning by processing of the tank rotation (S107) described later, and is determined by a preliminary test.

  In step S101, when it is determined that the water level of the outer tub 20 is not equal to or lower than the predetermined water level S (No), the control device 100 proceeds to step S102 and opens the drain valve 62. That is, as shown in FIG. 5 (b), the drain valve 62 is opened by energizing the valve motor 73 and pulling the connecting bar 71. At this time, the brake state of the rotating shaft 10a is released, but the inner tub 10 and the stirring blade 30 are not rotated by turning off the drive motor 40.

  In step S101, when it is determined that the water level of the outer tub 20 is equal to or lower than the predetermined water level S (Yes), the control device 100 proceeds to the process of step S103 and closes the drain valve 62. That is, as shown in FIG. 5A, when the energization of the valve motor 73 is turned off, the connecting bar 71 returns to the initial position by the elastic force of the coil spring 62c and the drain valve 62 is closed. At this time, the rotating shaft 10a of the inner tank 10 is tightened by the brake band 53, so that the rotation operation of the inner tank 10 is restricted. The rotating shaft 30a of the stirring blade 30 is connected to the drive motor 40, and the power of the driving motor 40 is transmitted to the rotating shaft 30a so that the stirring blade 30 can rotate.

  In step S <b> 104, the control device 100 rotates the stirring blade 30. At this time, the stirring blade 30 is rotated in both forward and reverse directions within a predetermined angle range (for example, within 180 degrees). Accordingly, the water on the back side of the stirring blade 30 is stirred, so that the back blade 33 (including the circumferential rib 34) of the stirring blade 30 and the bottom of the inner tank 10 are washed. Further, by operating the stirring blade 30 in the forward and reverse directions in this way, the cleaning effect of the back blade 33 of the stirring blade 30 and the bottom of the inner tank 10 can be improved as compared with the case where the stirring blade 30 is rotated in one direction. Can do. At this time, since the clutch mechanism 50 is in a washing state (see FIG. 5A), the drain valve 62 is closed, and water is not discharged from the outer tub 20.

  In step S105, the control device 100 determines whether or not a predetermined time t1 has elapsed since the rotation of the stirring blade 30 was started. The predetermined time t1 is determined by a prior test and is set to 30 seconds, for example. In step S105, when it is determined that the predetermined time t1 has not elapsed (No), the control device 100 returns to the process of step S104 and continues the stirring by the rotary blade 30, and the predetermined time t1 has elapsed. When it determines (Yes), it progresses to the process of step S106.

  In step S106, the control device 100 puts the clutch mechanism 50 into a dehydrating state (see FIG. 5B). That is, by energizing the valve motor 73 and pulling the connecting bar 71 toward the valve motor 73, the drain valve 62 is opened, the brake state of the clutch mechanism 50 is released, and the rotating operation of the rotating shaft 10a is allowed. At this time, the rotating shaft 30a is locked, and the inner tank 10 and the stirring blade 30 rotate together.

  In step S107, the control apparatus 100 performs tank rotation. That is, by energizing the drive motor 40, the driving force of the drive motor 40 is transmitted to the rotating shaft 10a, and the inner tub 10 rotates. In addition, the rotational speed of the inner tank 10 at this time is set lower than the rotational speed at the time of dehydration operation, for example, set to 70 rotations / minute, for example. As a result, the outer wall surface 10t (see FIG. 2) on the bottom side of the inner tub 10 and the inner peripheral wall 20t on the bottom side of the outer tub 20 (see FIG. 2) are washed.

  The pattern for rotating the inner tub 10 is not limited to means for rotating in one direction at a predetermined speed, and may be controlled to rotate in both forward and reverse directions, and increasing / decreasing the rotational speed, etc. Control may be made variable.

  In step S108, the control device 100 determines whether or not a predetermined time t2 has elapsed. Note that the predetermined time t2 is a time required for sufficiently washing the tank and draining all the water, and is set to 1 minute, for example. That is, in order to perform washing by tank rotation (S107), the clutch mechanism 50 needs to be in a state at the time of washing (see FIG. 5A), so the drain valve 62 is opened. For this reason, in cleaning by tank rotation, cleaning is performed while draining.

  In Step S108, when it is determined that the predetermined time t2 has not elapsed (No), the control device 100 returns to Step S107, continues the rotation of the inner tank 10 and the stirring blade 30, and the predetermined time t2 is When it determines with having passed (Yes), it progresses to the process of step S109.

  In step S <b> 109, the control device 100 turns off the drive motor 40 and stops the rotation of the inner tank 10 and the stirring blade 30.

  After the tank rotation is stopped (S109), in step S110, the control device 100 executes a tank cleaning shower process. In this tank cleaning shower process, the finishing agent / tank cleaning water supply electromagnetic valve 16b is opened to supply water to the water reservoir Q.

  Water is continuously supplied to the water reservoir Q, and the amount of water supplied to the water reservoir Q exceeds the volume of the water reservoir Q, so that water overflows from the rib 13d (see FIG. 8). The water overflowing from the water reservoir Q flows down along the outer peripheral wall 11s (see FIG. 8) of the trunk plate 11 through the outer peripheral wall 13s (see FIG. 8) of the fluid balancer 13. As described above, when water flows on the outer peripheral wall (the outer peripheral walls 13s and 11s) of the inner tub 10, dirt attached to the outer peripheral wall of the inner tub 10 can be washed away.

  Further, by supplying water while rotating the inner tub 10, water can be evenly overflowed from the ribs 13d. At this time, the valve motor 73 is energized to permit the rotation of the inner tank 10 and the drain valve 62 is opened, so that the tank is cleaned while the supplied water is discharged from the drain valve 62.

  By the way, the water that flows down the outer peripheral wall of the inner tub 10 easily flows so as to follow the path that first flows, and the path through which the water flows is easily fixed particularly when the amount of overflowing water is small. If it does so, water will not flow uniformly on the outer peripheral wall of the inner tank 10, and linear washing nonuniformity will generate | occur | produce. Therefore, the path through which the water flows can be changed by rotating the inner tub 10 in the forward and reverse directions without changing the rotation of the inner tank 10 in one direction, so that the water can be spread evenly. Although the linear washing unevenness can be prevented by increasing the amount of water, the inner tub 10 can be evenly washed with a smaller amount of water when forward and reverse rotation is performed.

  For example, forward / reverse rotation is performed for 120 s in total by repeating forward and reverse rotations 6 times for 20 s each time. The operation time may be set in advance, but may be determined based on detection results of various sensors such as a dirt sensor, an odor sensor, and a laundry concentration sensor. The amount of water supply is appropriately changed according to the forward / reverse rotation time. In the case of rotation in one direction instead of forward / reverse rotation, it is desirable to increase the amount of water supply. The forward / reverse rotation speed is approximately 30 rpm (rotation number per minute) in both forward and reverse directions. The rotational speed is appropriately adjusted so that water overflows from the water reservoir Q, but is preferably 5 to 60 rpm, and more preferably 20 to 40 rpm. If the rotational speed is too low, it is difficult for water to evenly flow from the ribs 13d. If the rotational speed is too high, the water in the water reservoir Q does not contact the outer peripheral wall of the inner tank 10 and between the inner tank 10 and the outer tank 20. Or the outer peripheral wall of the inner tank 10 is not cleaned.

  Then, water supply to the water reservoir Q is started again, and the rotational speed of the inner tub 10 is accelerated while water is stored in the water reservoir Q. As a result, the water accumulated in the water reservoir Q gets over the rib 13d by centrifugal force and scatters toward the outer tub 20 and falls down against the inner peripheral wall 20s of the outer tub 20. As a result, not only the amount of water supplied but also the amount of water stored in the water reservoir Q is collectively applied to the inner peripheral wall 20 s of the outer tub 20, so washing unevenness is unlikely to occur and the inner peripheral wall 20 s of the outer tub 20 is uniformly distributed. Can be washed.

  At this time, as the acceleration for rotating the inner tank 10 increases, more water stored in the water reservoir Q can be scattered to the outer tank 20 at a time. On the other hand, when the acceleration is small, a lot of water in the water reservoir Q is removed before the rotational speed of the inner tank 10 reaches a rotational speed at which the water in the water reservoir Q is scattered to the outer tank 20. It does not hang on the inner peripheral wall 20 s of the tank 20, and falls over the rib 13 d and falls between the outer peripheral wall of the inner tank 10 and between the inner tank 10 and the outer tank 20. Therefore, the amount of water hitting the inner peripheral wall 20s of the outer tub 20 is reduced.

  Therefore, in order to apply more water stored in the water reservoir Q to the inner peripheral wall 20s of the outer tub 20 at a time, it is preferable to rapidly accelerate the rotation speed of the inner tub 10. Therefore, the acceleration for rotating the inner tub 10 from the state where water is stored in the water reservoir Q is preferably 20 rpm / s (acceleration increasing by 20 rpm per second) or more, and preferably 40 rpm / s or more. The upper limit of acceleration is a value that takes into account the performance and vibration of the motor used. In addition, the timing which starts supplying water to the water reservoir Q can be increased before the rotational speed of the inner tank 10 is accelerated, so that the amount of water scattered during acceleration can be increased.

  By the way, in the washing machine 1 where the clutch mechanism 50 and the drain valve 62 operate in conjunction with each other, that is, when the inner tank 10 and the drive motor 40 are connected, the drain valve 62 opens, the inner tub 10 will be rotated. Then, the water left for the cleaning is discharged, and the cleaning of the stirring blade 30 and the bottom of the tank become insufficient.

  Therefore, in the washing machine 1 of the present embodiment, the inner tub 10, the stirring blade 30 provided at the bottom of the inner tub 10, the drive motor 40 that drives the inner tub 10 and the stirring wing 30, and the inner tub 10 or the stirring wing. And a clutch mechanism 50 that switches the connection between the drive motor 40 and the drive motor 40. Furthermore, the washing machine 1 is interlocked with the clutch mechanism 50 and opens when the inner tub 10 and the drive motor 40 are connected, and closes when the stirring blade 30 and the drive motor 40 are connected. 62, and a control device 100 that controls the stirring blade 30, the drive motor 40, and the clutch mechanism 50. Further, the control device 100 performs the tank cleaning by rotating the stirring blade 30 at the predetermined water level S. According to this, first, the clutch mechanism 50 is controlled so that the agitating blade 30 and the drive motor 40 are connected, so that the back blade 33 of the agitating blade 30 is washed with the drain valve 62 closed, and It is possible to clean the bottom of the inner tank 10.

  In the present embodiment, the control device 100 rotates the stirring blade 30 in both forward and reverse directions within a predetermined angle range. Thereby, the water accumulated on the back side of the stirring blade 30 can be stirred, and the cleaning effect of the back blade 33 can be enhanced by the water pressure at the time of stirring.

  Moreover, in this embodiment, the control apparatus 100 performs tank washing | cleaning by rotating the inner tank 10 after the tank washing | cleaning by rotation of the stirring blade 30. FIG. Thereby, not only the back blade 33 of the stirring blade 30 but also the outer wall surface 10t (see FIG. 2) on the bottom side of the inner tub 10 and the inner peripheral wall 20t (see FIG. 2) on the bottom side of the outer tub 20 can be washed. it can.

  Further, in the present embodiment, the predetermined water level S is an amount that can be drained at a predetermined time t2 necessary for cleaning the inner tank 10. Thereby, it is possible to prevent the time until the tank cleaning is completed from being unnecessarily extended by draining the cleaning water when the tank cleaning is completed.

Next, the detergent amount sensing and the water supply process will be described with reference to FIG. FIG. 10 is a flowchart showing detergent amount sensing and a water supply process.
By the way, in the washing machine in which the clutch mechanism 50 and the drain valve 62 are not interlocked, in the detergent amount sensing, it is first sensed how much laundry (cloth) is put in, starts water supply, and rotates the inner tub 10. Water was being supplied while letting it go. By performing such rotary water supply, water can be evenly applied to clothing. However, in the washing machine 1 according to the present embodiment, when the clutch mechanism 50 is switched to a state where the inner tub 10 can be rotated, the drain valve 62 opens. Such a process cannot be carried out because the drained water is discharged. Therefore, the rotation water supply is made possible by executing the process shown in FIG. 10 below. Note that the flow shown in FIG. 10 starts when the power of the washing machine 1 is turned on.

  As shown in FIG. 10, in step S201, the control device 100 executes detergent amount sensing. That is, the stirring blade 30 is rotated, and the load amount at that time is calculated from the measurement result by the clothing weight calculation unit 114 in the dry state before water supply.

  In step S202, the control device 100 records the detergent amount sensing value SN. The higher the detergent amount sensing value SN, the more clothes are thrown in.

  In step S203, the control apparatus 100 starts water supply. That is, the outer tank water supply electromagnetic valve 16a of the water supply unit 16 is opened, and tap water is injected into the outer tank 20 from the main water inlet 16e via the water supply path 16c.

  In step S204, the control device 100 determines whether or not the detergent amount sensing value SN recorded in step S202 is equal to or greater than a predetermined value. The predetermined value is a value that requires rotating water supply, and is appropriately set according to the capacity of the washing machine 1. In step S204, when it is determined that the detergent amount sensing value SN is equal to or greater than the predetermined value (Yes), that is, when it is determined that the amount of cloth is large, the control device 100 proceeds to the process of step S205. When it is determined that the amount sensing value SN is less than the predetermined value (No), that is, when it is determined that the amount of cloth is small, the process proceeds to step S208 without rotating water supply.

  In step S <b> 205, the control device 100 starts stirring by the stirring blade 30. The direction in which the stirring blade 30 is rotated is, for example, the clockwise direction W in the schematic diagram of FIG. Thus, the rotation direction of the stirring blade 30 varies depending on how the brake band 53 is wound. Moreover, although the rotating shaft 10a of the inner tank 10 is fastened by the brake band 53, by rotating the rotating shaft 30a of the stirring blade 30 and applying a force greater than the braking force by the brake band 53 of the rotating shaft 10a, The brake band 53 slides and the inner tub 10 can be rotated.

  In step S206, the control device 100 determines whether or not the predetermined stirring time t3 has elapsed. The predetermined stirring time t3 is determined by a prior test, and is set to, for example, 30 seconds to 1 minute. The predetermined stirring time t3 may be variable according to the detergent amount sensing value SN. In step S206, when it is determined that the predetermined stirring time t3 has not elapsed (No), the control device 100 returns to the process of step S205 and continues stirring, and determines that the predetermined stirring time t3 has elapsed. In the case (Yes), the process proceeds to step S207.

  In step S207, the control device 100 ends the stirring by the stirring blade 30.

  In step S208, the control device 100 determines whether or not the predetermined water level h1 has been reached. The predetermined water level h1 is set to about 10 cm to 15 cm from the stirring blade 30, for example. In Step S208, when it is determined that the control device 100 has not reached the predetermined water level h1 (No), the process of Step S208 is repeated, and when it is determined that the predetermined water level h1 has been reached (Yes), The process proceeds to step S209.

  In step S209, the control device 100 ends the water supply. That is, the outer tank water supply electromagnetic valve 16a of the water supply unit 16 is closed, and water injection into the outer tank 20 is stopped.

  Thus, the clutch mechanism 50 and the drain valve 62 are interlocked (the drain valve 62 is opened when the inner tank 10 and the drive motor 40 are connected, and the inner tank 10 and the stirring blade 30 are connected). In the washing machine 1, the inner tub 10 is rotated for a predetermined stirring time t 3 by rotating the stirring blade 30 and applying a force greater than the braking force of the brake band 53. . Therefore, rotational water supply is also possible in the washing machine 1 in which the clutch mechanism 50 and the drain valve 62 are interlocked.

  Next, the sensing process when starting from the rinsing operation will be described with reference to FIG. FIG. 11 is a flowchart showing a sensing process at the time of rinsing. By the way, conventionally, when starting from the rinsing operation, it is common to supply water without checking the amount of clothes and to supply water up to the maximum water level. For this reason, there was a problem that a large amount of water was consumed even if the amount of cloth was small. Therefore, the above-described problem is solved by executing the sensing process shown in FIG. In addition, FIG. 11 has shown the case where it starts from a rinse.

  As shown in FIG. 11, in step S301, the control device 100 determines whether or not the water level is set. The water level can be set as appropriate by the user, and is set by a switch on the operation panel 4. In step S301, when it is determined that the water level is set (No), the control device 100 proceeds to the process of step S320, and when it is determined that the water level is not set (Yes), the control apparatus 100 proceeds to the process of step S302. .

  In step S320, the control device 100 proceeds to a set water level rinsing process. In other words, after supplying the set water level, rinsing is performed while rotating the stirring blade 30 in the forward and reverse directions.

  In step S302, the control device 100 starts water supply. That is, the outer tank water supply electromagnetic valve 16a of the water supply unit 16 is opened, and tap water is injected into the outer tank 20 from the main water inlet 16e via the water supply path 16c.

  In step S303, the control device 100 determines whether or not the water level of the inner tub 10 is the predetermined water level WL1. The water level is detected by the water level detection device 6 (see FIG. 6), and the predetermined water level WL1 is determined by a prior test, and is set to a high position, for example, about 15 cm from the stirring blade 30. In step S303, when it is determined that the water level is not the predetermined water level WL1 (No), the control device 100 repeats the process of step S303, and when it is determined that the water level is the predetermined water level WL1 (Yes), the control device 100 proceeds to the process of step S304. move on.

  In step S304, the control apparatus 100 stops water supply. That is, the outer tank water supply electromagnetic valve 16a of the water supply unit 16 is closed, and water injection into the outer tank 20 is stopped.

  In step S305, the control device 100 executes the cloth amount sensing SN1. In the cloth amount sensing, the rotary blade 30 is rotated, and the clothing weight calculation unit 114 (see FIG. 6) calculates the weight of the clothing containing water.

  In step S306, the control device 100 determines whether or not the value SN1 obtained by the cloth amount sensing exceeds the threshold value TH1. The threshold value TH1 is determined by a prior test, and is set to the lowest value from a table set in eight stages, for example. In step S306, when it is determined that SN1 is equal to or less than the threshold value TH1 (No), the control device 100 proceeds to the process of step S321, and when it is determined that SN1 exceeds the threshold value TH1 (Yes). The process proceeds to step S307.

  In step S321, the control device 100 proceeds to the rinsing process. That is, the clothes are stirred and rinsed by rotating the stirring blade 30 at the predetermined water level WL1.

  In step S307, the control apparatus 100 starts water supply. In addition, the water supply here is the same as that of step S302.

  In step S308, the control device 100 determines whether or not the predetermined water level WL2. The predetermined water level WL2 is set to a water level higher than the predetermined water level WL1, for example, the predetermined water level WL1 + 10 cm. In step S308, when it is determined that the water level is not the predetermined water level WL2 (No), the control device 100 repeats the process of step S308, and when it is determined that the water level is the predetermined water level WL2 (Yes), the control device 100 proceeds to the process of step S309. move on.

  In step S309, the control device 100 stops water supply. The water supply stop here is the same as in step S304.

  In step S310, the control device 100 executes the cloth amount sensing SN2. The cloth amount sensing is the same as step S305.

  In step S311, the control device 100 determines whether or not the value SN2 obtained by the cloth amount sensing exceeds the threshold value TH2. The threshold value TH2 is determined by a prior test, and is set to the lowest value from a table set in, for example, eight levels. In step S311, when it is determined that SN2 is equal to or less than threshold value TH2 (No), control device 100 proceeds to the process of step S322, and when it is determined that SN2 exceeds threshold value TH2 (Yes). The process proceeds to step S312.

  In step S322, the control device 100 proceeds to the rinsing process. That is, the clothes are stirred and rinsed by rotating the stirring blade 30 at the predetermined water level WL2.

  In step S312, the control device 100 starts water supply. In addition, the water supply here is the same as that of step S302, S307.

  In step S313, the control device 100 determines whether or not the predetermined water level WL3. The predetermined water level WL3 is set to a water level higher than the predetermined water level WL2, for example, the predetermined water level WL2 + 10 cm. In step S313, when it is determined that the water level is not the predetermined water level WL3 (No), the control device 100 repeats the process of step S313, and when it is determined that the water level is the predetermined water level WL3 (Yes), the process of step S314 is performed. move on.

  In step S314, the control device 100 stops water supply. In addition, the water supply stop here is the same as that of step S304, S309.

  In step S315, the control device 100 starts rinsing. That is, the clothes are stirred and rinsed by rotating the stirring blade 30 at the predetermined water level WL3.

  Thus, in the washing machine 1 of this embodiment, the process of consuming a large amount of water even if the amount of cloth is small is executed by performing the determination of increasing the rinsing water level in stages and shifting to the rinsing process. Water can be prevented from being wasted.

  Next, the dehydration retry process will be described with reference to FIG. FIG. 12 is a flowchart showing the dehydration stroke retry. Note that the start of FIG. 12 is a stage where dehydration has started. By the way, the washing machine conventionally has a function of stopping the operation of the washing machine when there is an operation determination called a safety switch and the washing machine becomes unbalanced during dehydration. At the start, the rotation of the inner tub 10 is stopped.

  As shown in FIG. 12, in step S401, the control device 100 executes an operation determination of the safety switch 7 (see FIG. 6). The safety switch 7 is a mechanical switch that is provided in a gap between the casing 2 of the washing machine 1 and the outer tub 20 and is turned on when the outer tub 20 hits. In step S401, when it is determined that the safety SW switch 7 is not operated (No), the control device 100 proceeds to the process of step S407, and when it is determined that the safety switch 7 is operated (Yes), step S407 is performed. The process proceeds to S402.

  In step S407, the control device 100 continues dehydration. That is, the inner tank 10 is operated at a high speed for several minutes, and the dehydration process is completed.

  In step S402, the control device 100 determines whether or not the rotation speed of the inner tub 10 is equal to or lower than a predetermined rotation speed. The rotation speed of the inner tub 10 is calculated by the rotation speed calculation unit 113 (see FIG. 6). The predetermined rotation speed is a process for determining whether or not the rotation of the inner tub 10 is a low speed, and is set to, for example, 100 rotations / minute.

  In step S402, when the control device 100 determines that the rotation speed of the inner tank 10 is not equal to or lower than the predetermined rotation speed (No), the process proceeds to step S408, where the rotation speed of the inner tank 10 is equal to or lower than the predetermined rotation speed. (Yes), the process proceeds to step S403. Incidentally, when the safety switch 7 is operated at a high rotational speed to some extent, there is a possibility that the safety switch 7 has acted due to the resonance of the washing machine 1, so that the process proceeds to step S <b> 408 and shifts to rinsing.

  In step S408, the control device 100 returns to the rinsing process. That is, by starting water supply and rinsing, loosening clothes and eliminating imbalance.

  In step S403, the control device 100 executes a small load determination. Note that the small load is set to 2 kg or less, for example, and is detected in advance (cloth amount sensing) during the washing process.

  In step S403, when it is determined that the load is not a small load (No), the control device 100 proceeds to the process of step S408, and when determined to be a small load (Yes), the control device 100 proceeds to the process of step S404. Incidentally, in the case of a small amount of load, for example, when dewatering with 1 kg or less of clothing, the capacity is remarkably manifested in the phenomenon that the inner tank 10 (basket) can be dehydrated or cannot be dehydrated depending on where it starts. Even if it can be dehydrated originally, the safety switch 7 may be activated if the position of dehydration is bad and dehydration is not possible. For this reason, since it may shift to a rinse process and water may be used, the amount of water used can be reduced by avoiding such a process as much as possible.

  In step S404, the control device 100 determines whether or not the number of retries is 0, and if it is determined that the number of retries is 0 (Yes), the process proceeds to step S405 and the number of retries is 0. If it is determined that the number of times has not been reached (No), that is, if the retry has already been executed once, the process proceeds to step S408.

  In step S405, the control device 100 adds “1” to the current number of retries to obtain a new number of retries. When passing through step S404 for the first time, the number of retries is 0, so the number of retries set in step S405 is 1 (0 times + 1).

  In step S406, the control device 100 starts a retry. The retry is to stop the rotation of the inner tank 10 and then rotate the inner tank 10 again at a high speed.

  As described above, when the safety switch 7 is operated, the rotational speed of the inner tub 10 (step S402) and the small load determination (step S403) are executed so as not to shift to the rinsing process of step S408 as much as possible. In this way, water consumption can be suppressed.

  In the flow shown in FIG. 12, the case where the retry count is executed once has been described as an example. However, the configuration may be such that the retry count is executed a plurality of times.

  Next, the dehydration brake process will be described with reference to FIGS. FIG. 13 is a flowchart showing the dehydration brake process, FIG. 14A is a table showing motor off and brake time according to the tank rotation speed, FIG. 13B is a brake addition time according to the driving cycle, and FIG. Brake addition time according to the quantity sensing rank, (d) is a brake addition time according to the amount of laundry, and FIG. 15 is a graph showing changes in the tank rotation speed.

  By the way, when the brake is applied at the end of the dehydration, the clutch is tightened by the brake band 53. At this time, it is premised that the rotation of the inner tub 10 (basket) riding on the clutch does not coincide with the rotation of the drive motor 40 and the pulley 41. That is, the washing machine 1 has a structure in which when the brake is applied, it is not possible to know how much the inner tub 10 is currently decelerating and rotating. Therefore, in the washing machine 1 of the present embodiment, the time for applying the brake is adjusted to cope with it. In FIG. 13, the process is started during dehydration.

  As shown in FIG. 13, in step S <b> 501, the control device 100 records the rotation speed Bs of the inner tank 10. The rotation speed Bs is calculated by the rotation speed calculation unit 113 (see FIG. 6).

  In step S502, the control device 100 turns off the energization of the drive motor 40. Thereby, the inner tank 10 rotates by inertia and decelerates.

  In step S503, the control device 100 determines whether or not a predetermined time Tf has elapsed. The predetermined time Tf is set to the energization OFF time corresponding to the rotation speed Bs recorded in step S501 as shown in FIG. For example, when the rotational speed Bs <140 r / min, the energization OFF time (predetermined time Tf) is set to 0 sec (seconds). As shown in FIG. 14A, the motor energization off time (predetermined time Tf) is set longer as the rotational speed Bs increases.

  In step S503, when it is determined that the predetermined time Tf has not elapsed (No), the control device 100 repeats the process of step S503, and when it is determined that the predetermined time Tf has elapsed (Yes), The process proceeds to step S504.

  In step S <b> 504, the control device 100 starts a braking operation for applying a braking force to the inner tank 10. That is, the control device 100 controls the clutch mechanism 50 to the washing state (see FIG. 5A) and tightens the clutch (rotary shaft 10a) with the brake band 53, so that the braking force is applied to the inner tank 10. generate.

  In step S505, the control device 100 determines whether or not a predetermined time Tb has elapsed. As shown in FIG. 14A, the predetermined time Tb is set so that the brake time (Brake time) becomes longer as the rotational speed Bs increases. For example, when the rotational speed Bs in step S501 is 140 ≦ Bs <260, the brake time is set to 4 seconds.

  In step S505, when it is determined that the predetermined time Tb has not elapsed (No), the control device 100 repeats the process of step S505, and when it is determined that the predetermined time Tb has elapsed (Yes), The process proceeds to step S506.

  In step S506, the control device 100 determines whether or not the additional time Tc has elapsed. The additional time Tc is a time that is added to the brake time (Tb) and the brake is continuously applied, and is determined based on the operation cycle (the number of operations). As shown in FIG. 14B, when the operation cycle is less than 3000 times, the additional time is zero, and when the operation cycle is 3000 ≦ cycle <4000, the additional time is 1 second, and the operation cycle is When 4000 <cycle, the additional time is 2 seconds. As described above, the clutch band 53 wears as the operation cycle increases, so that the additional time is increased.

  In step S506, when it is determined that the additional time Tc has not elapsed (No), the control device 100 repeats the process of step S506, and when it is determined that the additional time Tc has elapsed (Yes), The process proceeds to step S507.

  In step S507, the control device 100 determines whether or not the additional time Tr has elapsed. The additional time Tr is a time during which the brake is continuously applied in addition to the brake time (Tb) and the additional time (Tc), and is determined based on the sensing rank. The sensing rank is determined according to the load, and is set to eight ranks. Rank 1 is the highest load and rank 8 is the lowest load. A load is calculated | required by the detected value of cloth amount sensing. As shown in FIG. 14C, in the case of rank 1 and rank 2, 2 seconds are added, respectively, in the case of rank 3 and rank 4, 1 second is added, and in the case of ranks 5 to 8, Means no additional time.

  In step S507, the additional time Tr due to the load (kg) shown in FIG. 14D may be used instead of the additional time Tr based on the sensing rank shown in FIG. When 8 <W, the additional time Tr is 2 seconds. When 5 <W ≦ 8, the additional time Tr is 1 second. When W ≦ 5, there is no additional time.

  For example, as shown in FIG. 15, when the rotation speed Bs of the inner tank 10 is 700 rpm, the energization OFF time (predetermined time Tf) of the drive motor 40 is set to 6 seconds, for example (see FIG. 15A). Thereby, the inner tank 10 decelerates while rotating by inertia. After the start of braking (step S504), the brake time (predetermined time Tb) is set to 20 seconds (see FIG. 14A), and the additional time Tc and sensing rank (or load) are set according to the driving cycle. The additional time Tr is set according to. Thereby, the inner tank 10 decelerates and stops after the brake time (predetermined time Tb) and the additional times Tc and Tr have elapsed.

  As described above, the washing machine 1 of the present embodiment includes the inner tub 10 provided in the housing 2, the stirring blade 30 provided at the bottom of the inner tub 10, and the drive for driving the inner tub 10 and the stirring blade 30. A motor 40, a lid 3 that is opened and closed when the laundry is put in and out of the inner tub 10, a lid opening / closing switch 70 that restricts the rotation of the lid 3, and a control device 100 are provided. Further, the control device 100 extends (changes) the brake time by a predetermined time Tc based on the washing operation cycle (the number of washing operations) at the end of the dehydration operation. According to this, the inner tank 10 at the end of the dehydration process can be braked appropriately, and the lid opening / closing switch 70 can be unlocked after the rotation of the inner tank 10 stops.

  In the washing machine 1 of the present embodiment, the control device 100 further extends the brake time according to the load of the laundry (see the sensing rank in FIG. 14C or the load in FIG. 14D). According to this, the inner tank 10 at the end of the dehydration process can be braked more appropriately, and the lid opening / closing switch 70 can be operated (unlocked) after the rotation of the inner tank 10 is completely stopped. Become.

  In the present embodiment, the case where the brake time Tb is extended has been described as an example. However, for example, when the number of washing operations is small or the load (sensing rank, load) is small, the brake time Tb is shortened. You may make it the structure to carry out.

DESCRIPTION OF SYMBOLS 1 Washing machine 2 Case 3 Lid 10 Inner tub (washing tub)
20 Outer tank 30 Stirring blade 40 Drive motor (drive device)
50 Clutch mechanism 60 Drainage device 62 Drainage valve 70 Lid opening / closing switch 62 Drainage valve 100 Control device S Predetermined water level (predetermined water level)

Claims (2)

A washing tub provided in the housing;
A stirring blade provided at the bottom of the washing tub;
A driving device for driving the washing tub and the stirring blade;
A lid that is opened and closed when the laundry is taken in and out of the washing tub;
A lid opening / closing switch for restricting rotation of the lid;
A controller for controlling the washing tub, the stirring blade, the driving device and the lid opening / closing switch,
The said control apparatus changes brake time based on the frequency | count of washing operation at the time of completion | finish of spin-drying | dehydration operation, The washing machine characterized by the above-mentioned.   The washing machine according to claim 1, wherein the control device further changes the brake time according to a load amount of the laundry.

Images