JP2017108770A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress vibration of a washing tub during dewatering effectively, in a washing machine which is constituted so that the washing tub is drawn out of an exterior case.SOLUTION: A fully automatic washing machine 1 includes: an exterior case 10 having an opening on a front surface; a drawing part capable of being drawn out from the exterior case 10 through the opening, and including a holding plate 80 and a door part 90; a washing tub 20 installed at the drawing part via a suspension 60, and including a washing and dewatering tub having a fluid balancer and an outer tub 21 in which the washing and dewatering tub is rotatably accommodated; a slide rail 100 for moving the drawing part linearly with respect to the exterior case 10; an acceleration sensor 110 arranged at the drawing part; and a control part. The control part acquires the inclination of the fully automatic washing machine 1 body based on static acceleration detected by the acceleration sensor 110, performs first dewatering control based on the inclination, and performs second dewatering control based on dynamic acceleration according to the vibration of the drawing part during dewatering detected by the acceleration sensor 110.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a washing machine.

  Conventionally, a cabinet with an open front is housed in a case with an open front so that it can be pulled out from the front, and the cabinet has a built-in washing tub that can store washing water and perform washing and dehydration. A washing machine has been proposed (see Patent Document 1). The washing tub is supported on the bottom surface of the cabinet via a suspension having a buffer function. Furthermore, the cabinet can be linearly moved in the front-rear direction by slide means provided between the cabinet and the case.

JP 2002-119786 A

  In such a drawer type washing machine, the resistance inside the sliding means, that is, in the configuration of Patent Document 1, it is possible to easily pull out the cabinet from the case by reducing the resistance between the roller and the rail as much as possible. It becomes possible. However, if the cabinet easily moves in the front-rear direction with respect to the case, the cabinet easily vibrates in the front-rear direction when vibration of the washing tub generated during dehydration is transmitted to the cabinet without being attenuated by the suspension.

  Usually, a latch is put between the front part of the closed cabinet, that is, the door part and the front face of the case, and the door part is locked so as not to open. However, since the latch is provided with a certain amount of play, if the cabinet vibrates violently in the front-rear direction, fine collisions are repeated between the door and the front of the case, leading to noise generation and damage to the door. There is a fear.

  This invention is made | formed in view of this subject, and aims at suppressing the vibration of the washing tub at the time of spin-drying | dehydration effectively in the washing machine of the structure which pulls out a washing tub from the inside of an exterior case.

  A washing machine according to a main aspect of the present invention includes an exterior case having an entrance / exit on a front surface, a drawer part that can be taken in and out from the exterior case through the entrance / exit, and a laundry having a fluid balancer installed in the drawer part via a suspension. A washing tub including a dewatering tub and an outer tub in which the laundry dewatering tub is rotatably accommodated, a slide mechanism that linearly moves the drawer with respect to the exterior case, and the drawer An acceleration sensor and a control unit are provided. Here, the control unit acquires the inclination of the washing machine body based on the static acceleration detected by the acceleration sensor, performs the first dehydration control based on the inclination, and performs the dehydration detected by the acceleration sensor. The second dehydration control is performed based on the dynamic acceleration according to the vibration of the drawer portion at the time.

  According to the above configuration, the acceleration sensor is used to detect whether the washing machine body is in a tilted state and whether the washing tub vibrates during dehydration. Depending on the result, it is possible to perform dewatering control for suppressing the vibration of the washing tub. Thereby, the vibration of the washing tub during dehydration can be effectively suppressed.

  In the washing machine according to this aspect, as the first dehydration control, when the inclination of the main body of the washing machine is larger than a threshold value related to the inclination, the control unit is inclined to have an unbalanced load generated in the washing / dehydrating tub. After the laundry dewatering tub is rotated so as to be positioned at the high side in the washing machine main body, the rotation of the laundry dewatering tub may be started for dehydration.

  According to the above configuration, when the washing machine body is in an inclined state, the weight balance between the fluid offset in the fluid balancer and the uneven load due to the laundry in the laundry dewatering tub is improved, and then the dehydration is performed. The rotation of the laundry dewatering tank is started up. As a result, the washing / dehydrating tank is unlikely to shake significantly when it starts to move, and the drawer portion is greatly shaken in the front-rear direction, so that it is difficult to cause a violent collision between the drawer portion and the exterior case. In addition, when the rotational speed of the laundry dewatering tub passes near the resonance point in the horizontal direction, the large swaying of the laundry tub due to resonance is unlikely to occur.

  In the washing machine according to this aspect, as the second dehydration control, the control unit stops the rotation of the laundry dewatering tub when the dynamic acceleration detected by the acceleration sensor is greater than a threshold value related to the dynamic acceleration. After that, it may be configured to perform a loosening operation for loosening the laundry in the laundry dewatering tub.

  According to said structure, when the vibration of the washing tub at the time of spin-drying | dehydration is large, rotation of a washing | cleaning dehydration tank is stopped and a loosening operation is performed. Thereby, when dehydration is restarted, the vibration of the washing tub can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, in the washing machine of the structure which pulls out a washing tub from the inside of an exterior case, the vibration of the washing tub at the time of spin-drying | dehydration can be suppressed effectively.

  The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

FIG. 1A is a front perspective view of a fully automatic washing machine according to the embodiment, and FIG. 1B is a state in which two fully automatic washing machines according to the embodiment are stacked up and down. FIG. FIG. 2 is a rear perspective view of the fully automatic washing machine showing a state in which the washing tub is pulled out to the front of the exterior case according to the embodiment. FIG. 3 is a side cross-sectional view of the fully automatic washing machine according to the embodiment, cut along line AA ′ in FIG. FIG. 4 is a block diagram showing the configuration of the fully automatic washing machine according to the embodiment. FIG. 5 is a flowchart showing a control operation during the dehydration process according to the embodiment. Drawing 6 (a) is a figure showing typically the state of the unbalanced load in the fluid in the fluid balancer after drainage, and the washing dehydration tub when the fully automatic washing machine main part inclines according to an embodiment. 6 (b) schematically shows the state of the fluid in the fluid balancer and the uneven load in the laundry dewatering tub when the laundry dewatering tub is half-rotated from the state of FIG. 6 (a), according to the embodiment. FIG. FIG. 7 is a flowchart illustrating a control operation during the dehydration process according to the first modification. FIG. 8 is a flowchart illustrating the control operation of the balance adjustment operation according to the first modification. FIG. 9 is a diagram schematically illustrating a state in which an uneven load in the laundry dewatering tub moves in accordance with the rotation of the laundry dewatering tub in the balance adjustment operation according to the first modification. FIGS. 10A and 10B are diagrams illustrating the configuration of a holding plate according to another modification, and FIG. 10C is a diagram illustrating the configuration of a cabinet according to another modification. .

  Hereinafter, the fully automatic washing machine 1 which is one Embodiment of the washing machine of this invention is demonstrated with reference to drawings.

  Fig.1 (a) is a front perspective view of the fully automatic washing machine 1, FIG.1 (b) is a front perspective view which shows the state in which the two fully automatic washing machines 1 were piled up and down. FIG. 2 is a rear perspective view of the fully automatic washing machine 1 showing a state in which the washing tub 20 is pulled out to the front of the outer case 10. FIG. 3 is a side sectional view of the fully automatic washing machine 1 cut along the line AA ′ in FIG.

  1 to 3, a fully automatic washing machine 1 includes an exterior case 10, a washing tub 20, a drive unit 30, a drainage unit 40, a water supply unit 50, four front and rear left and right suspensions 60, It includes four front and rear connecting portions 70, two left and right holding plates 80, a door portion 90, and a pair of left and right slide rails 100. The two holding plates 80 and the door portion 90 constitute a drawer portion of the present invention. The slide rail 100 corresponds to the slide mechanism unit of the present invention.

  The fully automatic washing machine 1 is a so-called drawer-type washing machine, and the user pulls the washing tub 20 forward from the outer case 10, puts the laundry into the drawn washing tub 20 from above, and opens the washing tub 20 again. It is accommodated in the outer case 10 and the laundry is washed. As shown in Fig. 1 (b), two fully automatic washing machines 1 can be installed on the floor of a washroom or the like so as to be stacked up and down. It is also possible to do this.

  The outer case 10 has a substantially rectangular parallelepiped box shape, and almost the entire front surface thereof opens as an entrance / exit 11. Engagement portions 12 are provided on the left and right inner side surfaces of the outer case 10 in the vicinity of the entrance 11. Further, a water supply connection port 13 is formed at the upper part and a drainage connection port 14 is formed at the lower part of the rear surface of the outer case 10. A drainage joint 15 is provided at the drainage connection port 14. Further, leg portions 16 are provided at the four corners on the bottom surface of the outer case 10.

  The washing tub 20 includes an outer tub 21 and a washing / dehydrating tub 22. On the upper surface of the outer tub 21, a laundry inlet 23 is formed, and a water inlet 24 is formed behind the inlet 23. The insertion port 23 is covered with an openable / closable inner lid 25. Suspension attachment portions 26 are provided on the outer peripheral surface of the outer tub 21 at the positions of the front right end and the left end and the rear right end and the left end, respectively. The suspension attachment portion 26 may be formed integrally with the outer tub 21, or may be formed separately from the outer tub 21 and fixed to the outer tub 21. In addition, in the exterior case 10, the clearance gap between the washing tub 20 and the exterior case 10 is taken large in the front-back direction compared with the left-right direction.

  A washing / dehydrating tub 22 is rotatably accommodated in the outer tub 21. The washing / dehydrating tub 22 rotates around a rotation axis extending in the vertical direction in the outer tub 21. A large number of dewatering holes 22 a are formed on the inner peripheral surface of the laundry dewatering tank 22 over the entire circumference. In addition, a fluid balancer 27 is provided in the upper part of the washing and dewatering tank 22. A fluid such as salt water is sealed inside the fluid balancer 27. Further, a pulsator 28 is disposed at the bottom of the washing and dewatering tank 22. A plurality of blades 28 a are provided radially on the surface of the pulsator 28.

  A drive unit 30 and a drainage unit 40 are disposed on the outer bottom of the outer tub 21. The drive unit 30 generates a torque for driving the washing / dehydrating tub 22 and the pulsator 28. The drive unit 30 includes a drive motor 31 and a transmission mechanism unit 32. The transmission mechanism 32 has a clutch mechanism, and in the washing process and the rinsing process, the torque of the drive motor 31 is transmitted only to the pulsator 28 by the switching operation by the clutch mechanism, and only the pulsator 28 is rotated. Then, the torque of the drive motor 31 is transmitted to the pulsator 28 and the washing / dehydrating tank 22 to rotate the pulsator 28 and the washing / dehydrating tank 22 integrally. Moreover, the transmission mechanism part 32 has a reduction mechanism. In the washing process and the rinsing process, the pulsator 28 rotates at a rotational speed at which the rotational speed of the drive motor 31 is lowered according to the reduction ratio of the speed reduction mechanism.

  The drainage unit 40 includes a drainage valve 41, a drainage pipe 42, and an internal drainage hose 43. A drain pipe 42 is connected to one end of the drain valve 41, and an internal drain hose 43 is connected to the other end of the drain valve 41. The drain pipe 42 is connected to a drain port (not shown) formed at the bottom of the outer tub 21. The internal drain hose 43 is connected to the drain joint 15 of the drain connection port 14 from the inside. An external drain hose (not shown) is connected to the drain joint 15 from the outside. When the drain valve 41 is opened, the water stored in the washing and dewatering tub 22 and the outer tub 21 is discharged outside the machine through the drain pipe 42, the internal drain hose 43 and the external drain hose.

  The internal drain hose 43 fits in the rear part of the outer case 10 so as to meander in the left and right directions in a state where the washing tub 20 is accommodated in the outer case 10. When the washing tub 20 is pulled out from the outer case 10, the internal drain hose 43 is deformed from a meandering state drawn by the washing tub 20 to a state close to straight.

  A water supply unit 50 is disposed at the upper rear of the outer case 10. The water supply unit 50 includes a water supply valve 51, a water supply pipe 52, and a connection pipe 53. A water supply pipe 52 is connected to one end of the water supply valve 51, and a connection pipe 53 is connected to the other end of the water supply valve 51. In the state where the washing tub 20 is accommodated in the exterior case 10, the outlet 52 a of the water supply pipe 52 faces the water inlet 24 of the outer tub 21. The connection pipe 53 faces the outside in the water supply connection port 13 and is connected to a water supply hose (not shown) extending from the water tap. When the water supply valve 51 is opened, tap water is supplied into the outer tub 21 through the water supply pipe 52 and the water inlet 24.

  The washing tub 20 is held by holding plates 80 disposed on both the left and right sides below the washing tub 20 via four suspensions 60, front, rear, left, and right. The suspension 60 has an upper end fixed to the suspension mounting portion 26 of the washing tub 20 and a lower end fixed to the holding plate 80 via the connecting portion 70. The suspension 60 supports the washing tub 20 so that it can be buffered. The holding plate 80 is long in the front-rear direction, the right holding plate 80 receives the right and left two suspensions 60, and the left holding plate 80 receives the left and right two front and rear suspensions 60.

  The suspension 60 includes a damper 61 and a coil spring 62. The damper 61 is, for example, an oil damper, and includes a cylinder 61a and a piston rod 61b. Oil is sealed in the cylinder 61a. The piston rod 61b has a piston (not shown) at its upper end, and when the piston rod 61b moves up and down, the piston moves up and down in the cylinder 61a while slidingly contacting the inner peripheral surface of the cylinder 61a. The cylinder 61 a side is connected to the suspension mounting portion 26, and the piston rod 61 b side is connected to the coupling portion 70. The coil spring 62 is provided between the cylinder 61a and the connecting portion 70 so as to contain the piston rod 61b. The suspension 60 elastically supports the washing tub 20 with a coil spring 62 and damps the vibration of the coil spring 62 with a damper 61. The damper 61 may be an air damper.

  An acceleration sensor 110 is attached to the upper surface of the left holding plate 80. The acceleration sensor 110 is a three-axis acceleration sensor that can detect dynamic acceleration and static acceleration in the three-axis directions of the vertical direction, the front-rear direction, and the left-right direction. When the holding plate 80 is stationary, the acceleration sensor 110 detects a static acceleration in three axial directions according to the inclination direction and the size of the fully automatic washing machine 1 main body. When the holding plate 80 vibrates due to the vibration of the washing tub 20 during dehydration or the like, the acceleration sensor 110 detects a dynamic acceleration corresponding to the direction and magnitude of the vibration. In the present embodiment, the acceleration sensor 110 has a holding plate so that the acceleration in the upward direction, the forward direction, and the left direction are positive values, and the acceleration in the downward direction, the backward direction, and the right direction are negative values. 80.

  The door portion 90 is fixed to the front end portions of the left and right holding plates 80 by an L-shaped mounting bracket 81. A lock device 91 for holding the door 90 in a closed state with respect to the exterior case 10 is provided on the upper portion of the door 90.

  The locking device 91 includes a lever 92, a link mechanism 93, and two left and right latches 94. When the door 90 is closed as shown in FIG. 3, the latch 94 engages with the engaging portion 12 of the outer case 10. When the door 90 is about to move forward, the latch 94 is hooked on the engaging portion 12, thereby holding the door 90 in a closed state. When the lever 92 is operated in the release direction by the user, the latch 94 is moved upward by the operation of the link mechanism 93 and the engagement between the latch 94 and the engaging portion 12 is released. As a result, the washing tub 20 can be pulled out from the outer case 10 together with the door 90. In the state in which the latch 94 is engaged with the engaging portion 12, a gap that provides some play is provided between the latch 94 and the engaging portion 12 in the front-rear direction.

  The left and right holding plates 80 can be linearly moved in the front-rear direction together with the washing tub 20 and the door 90 by the left and right slide rails 100, respectively. The slide rail 100 includes a fixed rail 101 and a movable rail 102 that are long in the front-rear direction. The fixed rail 101 is fixed to the lower part of the inner side surface of the outer case 10, and the movable rail 102 is fixed to the surface of the holding plate 80 that faces the inner side surface of the outer case 10. A roller (not shown) is provided inside the fixed rail 101, and the movable rail 102 moves in the front-rear direction within the fixed rail 101 so as to be sent to the roller. Thereby, the holding plate 80 fixed to the movable rail 102 moves smoothly in the front-rear direction together with the washing tub 20 and the door portion 90.

  FIG. 4 is a block diagram showing the configuration of the fully automatic washing machine 1.

  Fully automatic washing machine 1 is provided with operation part 120, water level sensor 130, and control unit 200 in addition to the composition mentioned above. The control unit 200 includes a control unit 201, a storage unit 202, a motor drive unit 203, a clutch drive unit 204, a water supply drive unit 205, and a drainage drive unit 206.

  The operation unit 120 outputs an input signal corresponding to the button operated by the user from various buttons such as the power button 121, the start button 122, and the course selection button 123 to the control unit 201. The water level sensor 130 detects the water level in the outer tub 21 and outputs a water level detection signal corresponding to the detected water level to the control unit 201.

  The motor drive unit 203 supplies a drive current to the drive motor 31 in accordance with a control signal from the control unit 201. The motor drive unit 203 includes a speed sensor that detects the rotation speed of the drive motor 31, an inverter circuit, and the like, and adjusts the drive current so that the drive motor 31 rotates at the rotation speed set by the control unit 201. For example, PWM control is used as motor drive control. In this case, the control unit 201 applies a pulse voltage having a duty ratio determined based on the detected number of revolutions to the drive motor 31, so that a drive current corresponding to the pulse voltage is supplied to the drive motor 31. .

  The clutch drive unit 204 drives the clutch mechanism 32a in accordance with the control signal output from the control unit 201. The water supply drive unit 205 drives the water supply valve 51 in accordance with a control signal from the control unit 201. The drain drive unit 206 drives the drain valve 41 in accordance with a control signal from the control unit 201.

  The storage unit 202 includes an EEPROM, a RAM, and the like. The storage unit 202 stores a program for executing a washing operation of various driving courses. The storage unit 202 stores various parameters and various control flags used for executing these programs.

  The control unit 201 includes a motor drive unit 203, a clutch drive unit 204, a water supply drive unit 205, a program stored in the storage unit 202 based on signals from the operation unit 120, the acceleration sensor 110, the water level sensor 130, and the like. The drain drive unit 206 and the like are controlled.

  In the fully automatic washing machine 1, washing operations of various operation courses are performed according to the operation of the operation unit 120 by the user. In the washing operation, under the control of the control unit 201, a washing process, an intermediate dehydration process, a rinsing process, and a final dehydration process are executed in order.

  In the washing step and the rinsing step, the pulsator 28 rotates rightward and leftward with water stored in the laundry dewatering tub 22. A water flow is generated in the washing and dewatering tank 22 by the rotation of the pulsator 28. In the washing step, the laundry is washed with the generated water flow and the detergent contained in the water. In the rinsing process, the laundry is rinsed by the generated water flow.

  In the intermediate and final dewatering steps, the laundry dewatering tub 22 and the pulsator 28 rotate as a unit at a high speed. The laundry is dehydrated by the action of centrifugal force generated in the laundry dewatering tub 22.

  FIG. 5 is a flowchart showing the control operation during the dehydration process. Hereinafter, the control operation by the control unit 201 during the dehydration process will be described with reference to FIG.

  When the dehydration process is started, the control unit 201 detects the magnitude and direction of the inclination of the fully automatic washing machine 1 body with respect to the horizontal direction based on the static acceleration in the triaxial direction detected by the acceleration sensor 110 (S1). And the control part 201 determines whether the magnitude | size of the detected inclination is more than the threshold value which concerns on the said inclination (S2). For example, when the fully automatic washing machine 1 main body is installed on an installation surface inclined with respect to the horizontal direction, the fully automatic washing machine 1 main body can be in a state inclined in the horizontal direction.

  When the detected magnitude of the inclination is equal to or greater than the threshold value (S2: YES), the control unit 201 rotates the drive motor 31 to rotate the laundry dewatering tub 22 integrated with the pulsator 28 half a turn (S3). At this time, the control unit 201 rotates the laundry dewatering tank 22 more slowly than when the rotation of the laundry dewatering tank 22 is started for dehydration.

  FIG. 6A is a diagram schematically showing the state of the fluid in the fluid balancer 27 after draining and the uneven load in the laundry dewatering tub 22 when the main body of the fully automatic washing machine 1 is tilted. (B) is a figure which shows typically the state of the fluid in the fluid balancer 27 and the unbalanced load in the laundry dewatering tank 22 when the laundry dewatering tank 22 is rotated halfway from the state of FIG. 6A and 6B show a state in which the laundry dewatering tub 22 is viewed from above.

  When the main body of the fully automatic washing machine 1 is tilted, the fluid in the fluid balancer 27 tends to be shifted to the low side in the laundry dewatering tub 22 as shown in FIG. In addition, the laundry drifting in the water during drainage before the dehydration process tends to move closer to the low side in the laundry dewatering tank 22 due to the action of gravity as the water in the laundry dewatering tank 22 is discharged. Therefore, after drainage, it is considered that an uneven load due to the laundry is likely to occur on the low side in the laundry dewatering tub 22 as shown in FIG. From this state, when the laundry dewatering tub 22 is rotated halfway, the unbalanced load moves to the high side of the fully automatic washing machine 1 main body, that is, to the high side in the laundry dewatering tub 22. On the other hand, the fluid once moves to the high side but immediately returns to the low side again. As a result, as shown in FIG. 6 (b), the uneven load and the fluid are arranged at positions facing each other, and the weight balance in the washing and dewatering tub 22 is improved.

  The control unit 201 rotates the drive motor 31 to start up the rotation of the laundry dewatering tub 22 for dehydration, and increases the rotation speed to 120 rpm (S4). As described above, the laundry dewatering tub 22 is in a well-balanced state. Therefore, when the rotational speed of the laundry dewatering tub 22 passes around 80 rpm, which is the horizontal resonance point, the washing tub 20 is large due to resonance. The occurrence of rolling can be suppressed.

  When the main body of the fully automatic washing machine 1 is not in a tilted state and the magnitude of the tilt is less than the threshold (S2: NO), the control unit 201 does not rotate the laundry dewatering tank 22 half-turned. The rotation is started up and the rotation speed is increased to 120 rpm (S4). When the main body of the fully automatic washing machine 1 is not tilted, the fluid dewatering and the uneven load due to the laundry as shown in FIG. When the rotation speed passes around 80 rpm, a large roll of the washing tub 20 due to resonance hardly occurs.

  When the rotation speed of the washing / dehydrating tub 22 reaches 120 rpm, the control unit 201 detects the dynamic acceleration of the holding plate 80 generated in the front-rear direction and the left-right direction of the fully automatic washing machine 1 while maintaining the rotation speed at 120 rpm. (S5). Then, the control unit 201 determines whether or not the detected absolute value of the dynamic acceleration is equal to or greater than the threshold value related to the dynamic acceleration regardless of the direction of the dynamic acceleration, that is, positive or negative (S6). The control unit 201 detects the dynamic acceleration and determines whether or not the absolute value of the detected dynamic acceleration is greater than or equal to a threshold value until a predetermined time has elapsed (S7).

  When the laundry dewatering tub 22 vibrates greatly due to an uneven load in the laundry dewatering tub 22, the vibration is transmitted to the holding plate 80 via the suspension 60 and the connecting portion 70. Since the holding plate 80 is easily moved in the front-rear direction by the slide rail 100, the holding plate 80 can vibrate greatly in the front-rear direction by transmission of this vibration. In such a case, the absolute value of the dynamic acceleration in the front-rear direction tends to be equal to or greater than the threshold value.

  In this embodiment, the lateral acceleration is also detected, but usually the longitudinal acceleration is larger than the lateral direction, so the absolute value of the lateral acceleration is greater than or equal to the threshold value. It is hard to get up. Therefore, it is not always necessary to detect the lateral acceleration.

  When the absolute value of the dynamic acceleration is equal to or greater than the threshold (S6: YES), the control unit 201 stops the rotation of the washing / dehydrating tub 22 (S8). Thereafter, the control unit 201 performs a loosening operation (S9). Specifically, the control unit 201 opens the water supply valve 51 to supply water, accumulates water in the laundry dewatering tub 22, and rotates the pulsator 28 left and right while the laundry dewatering tub 22 is stopped. By this loosening operation, the laundry is dispersed and the uneven load is eliminated. The controller 201 returns to step S1 after the water is discharged from the laundry dewatering tub 22 and restarts the dewatering process.

  If the absolute value of the dynamic acceleration remains below the threshold value (S6: NO) and a predetermined time has elapsed (S7: YES), the control unit 201 increases the rotational speed of the washing and dewatering tub 22 to the maximum rotational speed, for example, 900 rpm. (S10). At this time, the rotational speed of the washing / dehydrating tub 22 passes around 240 rpm, which is the resonance point in the vertical direction, but since the unbalanced load in the washing / dehydrating tub 22 is small, large pitching of the washing tub 20 due to resonance hardly occurs.

  When the rotation speed of the laundry dewatering tub 22 reaches the maximum rotation speed, the control unit 201 maintains the maximum rotation speed for a predetermined dehydration time and dehydrates the laundry (S11).

<Effect of Embodiment>
As described above, according to the present embodiment, the acceleration sensor 110 is used to detect whether or not the main body of the fully automatic washing machine 1 is tilted and whether or not the vibration of the washing tub 20 during dehydration is large. Detection can be performed, and dehydration control for suppressing vibration of the washing tub 20 can be performed according to each detection result. Thereby, the vibration of the washing tub 20 at the time of dehydration can be effectively suppressed.

  Further, according to the present embodiment, when the fully automatic washing machine 1 main body is tilted, the weight balance between the fluid offset in the fluid balancer 27 and the uneven load due to the laundry in the laundry dewatering tub 22 is obtained. After being improved, the rotation of the laundry dewatering tub 22 is started for dehydration. As a result, it is difficult for the washing / dehydrating tub 22 to shake greatly when it starts to move, and the holding plate 80 and the door 90 are greatly shaken in the front-rear direction, and a severe collision occurs between the door 90 and the exterior case 10. This is unlikely to occur. Further, when the rotational speed of the washing / dehydrating tub 22 passes near the lateral resonance point, the large swaying of the washing tub 20 due to resonance is unlikely to occur.

  Furthermore, according to the present embodiment, when the vibration of the washing tub 20 during dehydration is large, the rotation of the washing / dehydrating tub 22 is stopped and the loosening operation is performed. Thereby, when dehydration is restarted, the vibration of the washing tub 20 can be reduced. In particular, since the acceleration sensor 110 detects the dynamic acceleration, that is, detects the vibration in a state where the rotation speed of the washing / dehydrating tub 22 is lower than the resonance point in the vertical direction, the rotation speed of the washing / dehydrating tub 22 is set to the vertical resonance Large pitching of the washing tub 20 due to resonance when passing near the point can be prevented in advance.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications other than those described above can be made to the embodiments of the present invention. .

<Modification 1>
FIG. 7 is a flowchart illustrating a control operation during the dehydration process according to the first modification. FIG. 8 is a flowchart illustrating the control operation of the balance adjustment operation according to the first modification.

  In the above embodiment, when the main body of the fully automatic washing machine 1 is tilted, it is considered that an unbalanced load due to the laundry is generated on the low side in the laundry dewatering tub 22, and the laundry dewatering tub 22 is half-finished. By rotating, the unbalanced load is moved to the high place side, and the weight balance between the fluid and the unbalanced load which are offset to the low place side in the fluid balancer 27 is improved.

  On the other hand, in this modified example, the laundry dewatering tub 22 is slowly rotated to detect the position of the unbalanced load, and the laundry is removed so that the unbalanced load is located on the high side of the fully automatic washing machine 1 main body. By stopping the water tank 22, a balance adjustment operation for improving the weight balance between the offset fluid and the offset load is performed.

  In the control operation of FIG. 7 according to this modification, the process of step S12 is executed instead of the process of step S3 in the control operation of FIG. 5 according to the above embodiment.

  When the magnitude | size of the inclination of the fully automatic washing machine 1 main body is more than a threshold value (S2: YES), the control part 201 performs balance adjustment driving | operation (S12).

  Referring to FIG. 8, first, the control unit 201 raises the rotation of the washing / dehydrating tub 22 more slowly than when raising the rotation for dehydration, and increases the rotation speed to 20 rpm (S101). At this time, even if the weight balance between the fluid offset in the fluid balancer 27 and the unbalanced load in the washing / dehydrating tub 22 is not improved, the washing / dehydrating tub 22 starts to rotate slowly. Large shaking is unlikely to occur, and intense collision between the door 90 and the outer case 10 is unlikely to occur.

  Next, the control unit 201 samples the dynamic acceleration in the front-rear direction by the acceleration sensor 110 for a predetermined time, for example, 15 seconds while maintaining the rotation speed of the washing / dehydrating tub 22 at 20 rpm (S102). The laundry dewatering tub 22 rotates a plurality of times during a predetermined time, for example, 5 times if the predetermined time is 15 seconds.

  FIG. 9 is a diagram schematically showing a state in which the unbalanced load in the washing / dehydrating tub 22 moves with the rotation of the washing / dehydrating tub 22 in the balance adjustment operation. In FIG. 9, the laundry dewatering tub 22 is viewed from above, and a circle colored in gray in the figure indicates an uneven load due to the laundry in the laundry dewatering tub 22.

  In the balance adjustment operation, the washing and dewatering tank 22 rotates clockwise. As shown in a circle A in FIG. 9, when the unbalanced load passes through the right side of the fully automatic washing machine 1 main body, the washing and dewatering tub 22 is swung forward, and the holding plate 80 is swung forward. The forward dynamic acceleration detected at 110, that is, the positive dynamic acceleration is maximized. Moreover, as shown in a circle C in FIG. 9, when the unbalanced load passes through the left side of the fully automatic washing machine 1 main body, the washing and dewatering tub 22 swings backward, and the holding plate 80 swings backward due to this, The backward dynamic acceleration detected by the acceleration sensor 110, that is, the negative dynamic acceleration is maximized. Further, as shown in circles B and D in FIG. 9, when the unbalanced load passes through the front side and the rear side of the fully automatic washing machine 1 main body, the laundry dewatering tub 22 is not easily shaken back and forth, and is detected by the acceleration sensor 110. The absolute value of the applied dynamic acceleration is minimized.

  The control unit 201 extracts a positive maximum value, a negative maximum value, and an absolute minimum value for each rotation of the washing / dehydrating tub 22 from the sampled dynamic acceleration, and based on these, the position of the uneven load is determined. A positive maximum value, a negative maximum value and a minimum absolute value used for determination are determined (S103). For example, the average value of the positive maximum value, the negative maximum value, and the absolute minimum value for multiple times can be set as the positive maximum value, the negative maximum value, and the absolute minimum value for determination. . Or, among multiple positive maximum values, negative maximum values, and absolute minimum values, each minimum value may be a positive maximum value, negative maximum value, and absolute minimum value for determination. it can.

  The control unit 201 determines which one of front, rear, left and right of the fully automatic washing machine 1 body is on the high side from the inclination of the fully automatic washing machine 1 body detected in step S1 (S104). When the front side of the fully automatic washing machine 1 main body is a high place side (S104: front side), the unbalanced load in the washing and dewatering tub 22 is detected by the acceleration sensor 110 when passing through the front side of the fully automatic washing machine 1 main body. The absolute value of the dynamic acceleration becomes the minimum value that follows the dynamic acceleration having the positive maximum value. Therefore, when the control unit 201 detects that the absolute value of the dynamic acceleration detected by the acceleration sensor 110 has reached the minimum value after the dynamic acceleration has reached the positive maximum value (S105: YES), the laundry is removed. The water tank 22 is suddenly stopped by a brake (S109). For example, the control unit 201 can brake the washing / dehydrating tub 22 by applying an electromagnetic brake to the drive motor 31. In this way, the laundry dewatering tub 22 is stopped in a state where the unbalanced load is located on the front side of the fully automatic washing machine 1 main body.

  On the other hand, when the rear side of the fully automatic washing machine 1 main body is a high place side (S104: rear side), an acceleration sensor is used when the unbalanced load in the laundry dewatering tub 22 passes through the rear side of the fully automatic washing machine 1 main body. The absolute value of the dynamic acceleration detected at 110 is the minimum value that follows the dynamic acceleration having a negative maximum value. Accordingly, when the control unit 201 detects that the absolute value of the dynamic acceleration detected by the acceleration sensor 110 has reached the minimum value that follows the negative maximum value of the dynamic acceleration (S106: YES), the laundry is removed. The water tank 22 is suddenly stopped by a brake (S109). Further, when the left side of the fully automatic washing machine 1 main body is on the high side (S104: left side), when the unbalanced load in the laundry dewatering tub 22 passes through the left side of the fully automatic washing machine 1 main body, the acceleration sensor 110 The detected dynamic acceleration has a negative maximum value. Therefore, if the control part 201 detects that the dynamic acceleration detected by the acceleration sensor 110 became the negative maximum value (S107: YES), it will stop the washing | cleaning dehydration tank 22 suddenly with a brake (S109). Further, when the right side of the fully automatic washing machine 1 main body is the high place side (S104: right side), when the unbalanced load in the laundry dewatering tub 22 passes the right side of the fully automatic washing machine 1 main body, the acceleration sensor 110 The detected dynamic acceleration is a positive maximum value. Therefore, if the control part 201 detects that the dynamic acceleration detected by the acceleration sensor 110 became the positive maximum value (S108: YES), it will stop the washing | cleaning dehydration tank 22 suddenly with a brake (S109).

  By performing the balance adjustment operation in this manner, in the laundry dewatering tub 22, an uneven load is positioned on the high side in the laundry dewatering tub 22 as shown in FIG. In this state, the fluid that is offset in the fluid balancer 27 is located on the lower side of the fluid 22. For this reason, the weight balance between the offset fluid and the unbalanced load is improved.

  As described above, even with the configuration of the present modification, the same operational effects as those of the above-described embodiment can be obtained. Furthermore, in this modified example, the position of the unbalanced load in the laundry dewatering tub 22 is detected, and the laundry dewatering tub 22 is rotated based on the detection result. The weight balance can be adjusted better.

<Other changes>
In the above embodiment, the acceleration sensor 110 is disposed on the holding plate 80. However, the present invention is not limited to this. For example, the acceleration sensor 110 may be disposed on the door 90. Further, another member such as a mounting bracket may be attached to the holding plate 80 or the door portion 90, and the acceleration sensor 110 may be disposed on this other member. In this case, the other member constitutes the drawer portion of the present invention together with the holding plate 80 and the door portion 90.

  In the above embodiment, the washing tub 20 is held by the two left and right holding plates 80. However, the configuration for holding the washing tub 20 is not limited to this, and, for example, as shown in FIG. 10A, four holding plates 80A, front, rear, left, and right are provided, and the two left holding plates 80A are movable to the left. The structure attached to the rail 102 may be taken. Alternatively, as shown in FIG. 10B, a configuration in which one holding plate 80B is provided and the left and right movable rails 102 are attached to the left and right side surfaces of the holding plate 80B may be employed.

  Furthermore, as a configuration for holding the washing tub 20, a cabinet 80C having an open upper surface as shown in FIG. 10C may be provided. In this case, the washing tub 20 is installed through the suspension 60 inside the cabinet 80C. Then, the movable rail 102 is attached to the left and right side lower portions of the cabinet 80C. For example, the acceleration sensor 110 may be disposed on the bottom surface of the cabinet 80C or on the front, back, left, and right side surfaces. The cabinet 80C constitutes the drawer portion of the present invention together with the door portion 90.

  Further, in the above embodiment, the slide rail 100 including the fixed rail 101 and the movable rail 102 is used to move the holding plate 80 holding the washing tub 20 in the front-rear direction. However, the present invention is not limited to this. For example, as a slide mechanism unit, rollers are provided at the lower portions of the left and right inner surfaces of the outer case 10, and the rollers rotate in contact with rails provided on the bottom surfaces of the left and right holding plates 80. Thus, a configuration may be adopted in which the rail is sent in the front-rear direction.

  Furthermore, in the above embodiment, the suspension 60 is configured by the damper 61 and the coil spring 62. However, the suspension 60 may be configured only by the damper 61 or the coil spring 62.

  Further, in the above embodiment, the acceleration acceleration is performed by the acceleration sensor 110 during a period in which the rotation speed of the washing / dehydrating tub 22 is maintained at 120 rpm, that is, a part of the period in which the rotation of the washing / dehydrating tub 22 rises to the maximum rotation speed. Was detected, and the magnitude of vibration of the washing tub 20 was determined based on the detected dynamic acceleration. However, the dynamic acceleration is detected by the acceleration sensor 110 during the entire period in which the rotation of the washing / dehydrating tub 22 rises to the maximum number of rotations, or in a part of the period more than the above embodiment, and the detected dynamic acceleration is obtained. A configuration in which the magnitude of vibration of the washing tub 20 is determined based on the above may be adopted.

  Furthermore, in the said embodiment, although the fully automatic washing machine 1 was illustrated, this invention can also be applied to the fully automatic washing / drying machine which has a drying function in addition to a washing function.

  In addition, the embodiment of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

1 Fully automatic washing machine (washing machine)
10 Exterior case
20 Washing tub
21 Outer tank
22 Laundry dewatering tank
60 suspension
80 Holding plate (drawer)
90 Door (drawer)
100 Slide rail (slide mechanism)
110 Acceleration sensor
201 Control unit

Claims (3)

An exterior case having an entrance on the front surface;
A drawer that can be taken in and out of the outer case through the doorway;
A washing tub installed in the drawer through a suspension and including a laundry dewatering tub having a fluid balancer and an outer tub in which the laundry dewatering tub is rotatably accommodated;
A slide mechanism that linearly moves the drawer with respect to the exterior case;
An acceleration sensor disposed in the drawer;
A control unit,
The control unit obtains the inclination of the washing machine body based on the static acceleration detected by the acceleration sensor, performs the first dehydration control based on the inclination, and detects the dehydration time detected by the acceleration sensor. Performing the second dehydration control based on the dynamic acceleration according to the vibration of the drawer portion,
A washing machine characterized by that. The washing machine according to claim 1,
In the first dehydration control, when the inclination of the washing machine main body is larger than a threshold related to the inclination, the control unit is configured such that an uneven load generated in the washing / dehydrating tub is inclined at a high place in the washing machine main body. After rotating the laundry dewatering tub to be positioned at
A washing machine characterized by that. The washing machine according to claim 1 or 2,
When the dynamic acceleration detected by the acceleration sensor is greater than a threshold value related to the dynamic acceleration, the control unit stops the rotation of the laundry dewatering tub, and then, as the second dehydration control, Perform loosening operation to loosen the laundry,
A washing machine characterized by that.

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