WO2017101774A1 - Washing machine - Google Patents

Abstract

In a washing machine structured in a way that a washing tub is pulled out from an externally mounted housing, vibration of the washing tub while spin-drying is effectively suppressed. A fully automatic washing machine (1) comprising: an externally mounted housing (10) provided at the front surface thereof with an entrance/exit; a drawer part capable of entering into and exiting from the externally mounted housing (10) via the entrance/exit and comprising a retaining plate (80) and a door part (90); a washing tub (20) arranged in the drawer part via a suspension frame (60) and comprising a washing and spin-drying tub having a fluid balancer and an outer tub (21) accommodating the washing and spin-drying tub in a freely rotatable manner; a slide rail (100) allowing the drawer part to move linearly relative to the externally mounted housing (10); an accelerometer (110) arranged in the drawer part; and a control part. The control part acquires the tilt of a main body of the fully automatic washing machine (1) on the basis of a static acceleration detected by the accelerometer (110), exerts first spin-dry control on the basis of the tilt, and exerts second spin-dry control on the basis of a dynamic acceleration detected by the accelerometer (110) and corresponding to vibrations of the drawer part while spin-drying.

Description

washing machine Technical field

The invention relates to a washing machine.

Background technique

In the past, the following drawer type washing machine has been proposed: in the casing whose front surface is open, the upper open cabinet is accommodated in such a manner as to be able to be taken out from the front, and the cabinet is provided with a washing machine capable of storing washing water and being capable of washing and dehydrating. Bucket (refer to Patent Document 1). The washing tub is supported on the bottom surface of the cabinet via a suspension having a cushioning function. Moreover, the cabinet can be linearly moved in the front-rear direction by a sliding unit provided between the cabinet and the cabinet.

In such a drawer type washing machine, the cabinet can be easily taken out from the casing by minimizing the internal resistance of the sliding unit, that is, the resistance between the roller and the rail in the structure of Patent Document 1. However, when the cabinet is easily moved in the front-rear direction with respect to the casing, the vibration of the washing tub generated during dehydration is not completely transmitted to the cabinet by the suspension being attenuated, and the cabinet is easily vibrated in the front-rear direction.

Generally, a latch is provided between the front surface portion of the closed cabinet, that is, the front portion of the door and the front surface of the cabinet, so as to be locked so that the door portion cannot be opened. However, since the door latch has a certain degree of play, when the cabinet vibrates vigorously in the front-rear direction, the door and the front surface of the casing repeatedly collide slightly, which may cause noise, door parts, etc. damaged.

Prior art literature

Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2002-119786

Summary of the invention

Problems to be solved by the invention

The present invention has been made in view of such problems, and an object thereof is to extract from an exterior casing In the washing machine having the structure of the washing tub, the vibration of the washing tub at the time of dehydration is effectively suppressed.

Solution to solve the problem

A washing machine according to a main aspect of the present invention includes: an exterior casing having an inlet and outlet on a front surface; a drawer portion that can enter and exit the outer casing through the inlet and outlet; and a washing tub that is disposed on the drawer through a suspension, including a washing and dewatering tub of the fluid balancer and a tub that rotatably accommodates the washing and dewatering tub; a sliding mechanism portion that linearly moves the drawer portion relative to the outer casing; and an acceleration sensor disposed in the drawer portion; And the control department. Here, the control unit acquires the tilt of the washing machine body based on the static acceleration detected by the acceleration sensor, and performs the first dehydration control based on the tilt, and based on the drawer detected by the acceleration sensor and the dehydration The second dehydration control is performed by the dynamic acceleration corresponding to the vibration of the portion.

According to the above configuration, it is possible to detect whether or not the main body of the washing machine is in an inclined state and whether the vibration of the washing tub is large during dehydration using the acceleration sensor, and to perform dehydration control for suppressing vibration of the washing tub based on the respective detection results. . Thereby, the vibration of the washing tub at the time of dehydration can be effectively suppressed.

In the washing machine of the present aspect, as the first dehydration control, the control unit may cause the partial deviation generated in the washing and dewatering tank when the inclination of the washing machine main body is greater than the relevant threshold value of the inclination The washing dewatering tub is rotated in such a manner that the load is located on the high side of the inclined washing machine main body, after which the rotation of the washing dewatering tub is started to perform dehydration.

According to the above configuration, in the case where the main body of the washing machine is in an inclined state, the rotation of the washing and dewatering tub is started after improving the weight balance between the fluid biased in the fluid balancer and the eccentric load of the laundry in the washing and dewatering tub. For dehydration. As a result, the washing and dewatering bucket does not easily vibrate greatly when it starts to work, and the drawer portion does not easily vibrate greatly in the front-rear direction, resulting in a violent collision between the drawer portion and the exterior casing. Further, when the rotational speed of the washing and dewatering tubing passes near the lateral resonance point, it is difficult for the washing tub to largely oscillate laterally due to resonance.

In the washing machine of the present aspect, as the second dehydration control, the control unit stops the washing and dehydrating barrel when the dynamic acceleration detected by the acceleration sensor is greater than a relevant threshold of the dynamic acceleration. The rotation is followed by a unwinding operation for unwinding the laundry in the washing and dewatering tub.

According to the above configuration, in the case where the vibration of the washing tub is large at the time of dehydration, the rotation of the washing and dewatering tub is stopped and the unwinding operation is performed. Thereby, the vibration of the washing tub can be weakened when the dehydration is restarted.

Effect of the invention

According to the present invention, it is possible to effectively suppress the vibration of the washing tub during dehydration in the washing machine having the structure in which the washing tub is taken out from the outer casing.

The effects and significance of the present invention will be further clarified by the description of the embodiments shown below. However, the following embodiments are merely examples when the present invention is implemented, and the present invention is not limited by the contents described in the following embodiments.

DRAWINGS

Fig. 1(a) is a front perspective view of a fully automatic washing machine according to an embodiment, and Fig. 1(b) is a front perspective view showing a state in which two fully automatic washing machines of the embodiment are vertically overlapped.

Fig. 2 is a rear perspective view showing the fully automatic washing machine in a state in which the washing tub of the embodiment is taken out to the outside of the casing.

Fig. 3 is a side cross-sectional view showing the fully automatic washing machine taken along line A-A' of Fig. 1(a) of the embodiment.

4 is a block diagram showing the configuration of a fully automatic washing machine of an embodiment.

Fig. 5 is a flowchart showing a control operation at the time of the dehydration process of the embodiment.

Fig. 6 (a) is a view schematically showing a state in which the fluid in the fluid balancer after draining and the eccentric load in the washing and dewatering tub are drained when the main body of the fully automatic washing machine of the embodiment is tilted, and Fig. 6 (b) is a schematic view A diagram showing a state of the fluid in the fluid balancer and the eccentric load in the washing and dewatering tub when the washing and dewatering tub is rotated half a turn from the state of FIG. 6( a ) in the embodiment.

FIG. 7 is a flowchart showing a control operation at the time of the dehydration process of Modification 1.

FIG. 8 is a flowchart showing a control operation of the balance adjustment operation in Modification 1.

FIG. 9 is a view schematically showing a state in which the eccentric load in the washing and dewatering tub moves in accordance with the rotation of the washing and dewatering tub in the balance adjusting operation in the first modification.

Figs. 10(a) and (b) are diagrams showing the configuration of a holding plate of another modified example, and Fig. 10(c) is a view. A diagram showing the structure of a cabinet of another modified example.

detailed description

Hereinafter, a fully automatic washing machine 1 as an embodiment of the washing machine of the present invention will be described with reference to the drawings.

Fig. 1(a) is a front perspective view of the fully automatic washing machine 1, and Fig. 1(b) is a front perspective view showing a state in which two fully automatic washing machines 1 are vertically overlapped. FIG. 2 is a rear perspective view showing the fully automatic washing machine 1 in a state in which the washing tub 20 is taken out to the front of the casing 10. Figure 3 is a side cross-sectional view of the fully automatic washing machine 1 taken along line A-A' of Figure 1 (a).

1 to 3, the fully automatic washing machine 1 includes an exterior casing 10, a washing tub 20, a driving unit 30, a drainage unit 40, a water supply unit 50, four suspensions 60 on the front, rear, left and right sides, four connection portions 70 on the front, rear, left and right sides, The left and right holding plates 80, the door portion 90, and the left and right sets of the slide rails 100. The drawer portion of the present invention is composed of two holding plates 80 and a door portion 90. The slide rail 100 corresponds to the slide mechanism portion of the present invention.

The fully automatic washing machine 1 is a so-called drawer type washing machine. The user pulls the washing tub 20 forward from the outer casing 10, and puts the laundry into the washing tub 20 from above, and then houses the washing tub 20 in the outer casing 10. To wash the laundry. As shown in Fig. 1(b), since the two fully automatic washing machines 1 can be placed in the floor of a bathroom or the like so as to overlap each other, it is possible to efficiently use the installation space to perform separate washing of the laundry.

The exterior casing 10 has a box shape of a substantially rectangular parallelepiped shape, and its front surface is almost entirely opened as an inlet and outlet 11. On the left and right inner side surfaces of the exterior casing 10, an engaging portion 12 is provided in the vicinity of the vicinity of the entrance and exit 11. Further, on the rear surface of the exterior casing 10, a water supply connection port 13 is formed in the upper portion, and a drainage connection port 14 is formed in the lower portion. The drain connection port 14 is provided with a drain joint 15. Further, on the bottom surface of the exterior casing 10, the leg portions 16 are provided at the four corners.

The washing tub 20 includes an outer tub 21 and a washing dewatering tub 22. A washing port 23 is formed in the upper surface of the tub 21, and a water inlet 24 is formed behind the inlet port 23. The inlet 23 is covered by the inner lid 25 which is freely opened and closed. On the outer peripheral surface of the outer tub 21, a suspension mounting portion 26 is provided at a position of the right end and the left end of the front side and a position of the right end and the left end of the rear side, 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. It should be noted that in the outerwear In the casing 10, the gap between the washing tub 20 and the outer casing 10 is treated to be larger in the front-rear direction than in the left-right direction.

The washing and dewatering tub 22 is rotatably housed in the outer tub 21. The washing and dewatering tub 22 is rotated in the outer tub 21 around a rotation axis extending in the vertical direction. On the inner circumferential surface of the washing and dewatering tub 22, a plurality of dewatering holes 22a are formed throughout the entire circumference. Further, a fluid balancer 27 is provided at an upper portion of the washing and dewatering tub 22. The fluid balancer 27 is filled with a fluid such as saline. Further, a pulsator 28 is disposed at the bottom of the washing and dewatering tub 22. A plurality of blades 28a are radially provided on the surface of the pulsator 28.

A drive unit 30 and a drain unit 40 are disposed at the outer bottom of the outer tub 21. The drive unit 30 generates a torque that drives the washing and dewatering tub 22 and the pulsator 28. The drive unit 30 includes a drive motor 31 and a transmission mechanism portion 32. The transmission mechanism portion 32 has a clutch mechanism, and by the switching operation of the clutch mechanism, only the torque of the drive motor 31 is transmitted to the pulsator 28 during the washing process and the rinsing process, so that only the pulsator 28 is rotated during the dehydration process. The torque of the drive motor 31 is transmitted to the pulsator 28 and the washing and dewatering tub 22, so that the pulsator 28 and the washing and dewatering tub 22 are integrally rotated. Further, the transmission mechanism portion 32 has a speed reduction mechanism. During the washing process and the rinsing process, the pulsator 28 is rotated at the number of revolutions of the drive motor 31 in accordance with the speed at which the speed reduction ratio of the speed reduction mechanism is lowered.

The drain unit 40 includes a drain valve 41, a drain pipe 42, and an internal drain 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 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 tub 21 is discharged to the outside of the body through the drain pipe 42, the internal drain hose 43, and the external drain hose.

In a state where the washing tub 20 is housed in the outer casing 10, the inner drain hose 43 is housed in the rear portion of the outer casing 10 in a meandering manner. When the washing tub 20 is withdrawn from the outer casing 10, the inner drain hose 43 is pulled out by the washing tub 20 and deforms from a meandering state to a nearly straight state.

A water supply unit 50 is disposed at an upper rear portion of the exterior casing 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 a state where the washing tub 20 is housed in the outer casing 10, the outflow port 52a of the water supply pipe 52 faces the water injecting port 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 faucet. When the water supply valve 51 is opened, it is coming Water is supplied into the outer tub 21 through the water supply pipe 52 and the water injection port 24.

The washing tub 20 is held by the holding plates 80 disposed on the left and right sides of the washing tub 20 via the front, rear, left, and right suspensions 60. The upper end portion of the suspension 60 is fixed to the suspension attachment portion 26 of the washing tub 20, and the lower end portion is fixed to the holding plate 80 via the coupling portion 70. The suspension 60 supports the washing tub 20 in a cushioning manner. The holding plate 80 is long in the front-rear direction, the right holding plate 80 receives the front and rear two suspensions 60, and the left holding plate 80 receives the front and rear two suspensions 60 on the left side.

The suspension 60 is provided with a damper 61 and a coil spring 62. The damper 61 is, for example, a hydraulic damper including a cylinder 61a and a piston rod 61b. Oil is filled in the cylinder 61a. The piston rod 61b has a piston (not shown) at the upper end portion. When the piston rod 61b moves up and down, the piston moves up and down in the cylinder 61a while slidingly contacting the inner circumferential surface of the cylinder 61a. The cylinder 61a side is connected to the suspension attachment portion 26, and the piston rod 61b side is connected to the coupling portion 70. The coil spring 62 is provided between the cylinder 61a and the coupling portion 70 so as to enclose the piston rod 61b. The suspension 60 elastically supports the washing tub 20 by the coil spring 62, and the vibration of the coil spring 62 is attenuated by the damper 61. It should be noted that the damper 61 may also be an air damper.

An acceleration sensor 110 is attached to the upper surface of the holding plate 80 on the left side. The acceleration sensor 110 is a three-axis acceleration sensor capable of detecting dynamic acceleration and static acceleration in three 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 the static acceleration in the three-axis direction corresponding to the direction and size of the inclination of the main body of the fully automatic washing machine 1. Further, when the holding plate 80 vibrates due to the vibration of the washing tub 20 in the case of dehydration or the like, the acceleration sensor 110 detects a dynamic acceleration corresponding to the direction and magnitude of the vibration. In addition, in the present embodiment, the acceleration sensor 110 has a positive value in the acceleration of the upper side, the front side, and the left side, and the accelerations of the lower side, the rear side, and the right side are negative values, and are attached to the holding plate in this manner. 80.

The door portion 90 is fixed to the front end portions of the left and right holding plates 80 by the L-shaped mounting metal members 81. The upper portion of the door portion 90 is provided with a locking device 91 for holding the door portion 90 in a state of being closed with respect to the outer casing 10.

The locking device 91 includes a lever 92, a link mechanism 93, and two left and right latches 94. As shown in FIG. 3, when the door portion 90 is closed, the latch 94 is engaged with the engaging portion 12 of the outer casing 10. When the door portion 90 attempts to move forward, the door latch 94 is caught by the engaging portion 12, whereby the door portion 90 is kept in the closed state. When the user releases the steering lever 92, the latch 94 moves upward by the operation of the link mechanism 93, and the engagement between the latch 94 and the engaging portion 12 is released. Thereby, the washing tub 20 is constructed together with the door portion 90 from the outside The state in which the casing 10 is taken out. In the state in which the latch 94 and the engaging portion 12 are engaged with each other, a gap having a slight play is provided between the latch 94 and the engaging portion 12 along the front-rear direction.

The left and right holding plates 80 can linearly move the washing tub 20 together with the door portion 90 in the front-rear direction 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 a lower portion of the inner side surface of the outer casing 10, and the movable rail 102 is fixed to a surface of the holding plate 80 that faces the inner side of the outer casing 10. A roller (not shown) is provided inside the fixed rail 101, and the movable rail 102 moves in the front-rear direction in the fixed rail 101 so as to be conveyed by the roller. Thereby, the holding plate 80 fixed to the movable rail 102 smoothly moves 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.

In addition to the above configuration, the fully automatic washing machine 1 includes an operation unit 120, a water level sensor 130, and a control unit 200. 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 drain drive unit 206.

The operation unit 120 outputs a corresponding input signal of a button operated by the user among various buttons such as the power button 121, the start button 122, and the program 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 based on a control signal from the control unit 201. The motor drive unit 203 has a speed sensor that detects the number of revolutions 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 number of revolutions set by the control unit 201. For example, as motor drive control, PWM (Pulse Width Modulation) control can be used. In this case, the control unit 201 applies a pulse voltage of the duty ratio determined based on the detected rotation speed to the drive motor 31, thereby supplying a drive current corresponding to the pulse voltage to the drive motor 31.

The clutch drive unit 204 drives the clutch mechanism 32a based on a control signal output from the control unit 201. The water supply drive unit 205 drives the water supply valve 51 based on a control signal from the control unit 201. The drain drive unit 206 drives the drain valve 41 based on 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 therein for performing various operations The mode of the washing operation program. Further, the storage unit 202 stores various parameters and various control flags for executing these programs.

The control unit 201 controls the motor drive unit 203, the clutch drive unit 204, the water supply drive unit 205, and the drain drive unit 206 in accordance with 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. Wait.

The fully automatic washing machine 1 performs a washing operation in various operation modes corresponding to the operation of the operation unit 120 by the user. In the washing operation, the washing process, the intermediate dehydration process, the rinsing process, and the final dehydration process are sequentially performed under the control of the control section 201.

In the washing process and the rinsing process, the pulsator 28 is rotated to the right and to the left in a state where water is stored in the washing and dewatering tub 22. A flow of water is generated in the washing and dewatering tub 22 by the rotation of the pulsator 28. During the washing process, the laundry is washed by the generated water stream and the detergent contained in the water. During the rinsing process, the laundry is rinsed by the resulting water flow.

In the intermediate dehydration process and the final dehydration process, the washing and dewatering tub 22 and the pulsator 28 are integrally rotated at a high speed. The laundry is dehydrated by the action of centrifugal force generated by washing the dewatering tub 22.

Fig. 5 is a flow chart showing the control operation at the time of the dehydration process. Hereinafter, the control operation of the control unit 201 during the dehydration process will be described with reference to Fig. 5 .

When the dehydration process is started, the control section 201 detects the magnitude and direction of the inclination of the main body of the fully automatic washing machine 1 with respect to the horizontal direction based on the static acceleration in the three-axis direction detected by the acceleration sensor 110 (S1). Then, the control unit 201 determines whether or not the magnitude of the detected tilt is equal to or greater than the relevant threshold of the tilt (S2). For example, in the case where the main body of the fully automatic washing machine 1 is disposed at a setting surface inclined with respect to the horizontal direction, the main body of the fully automatic washing machine 1 may be inclined to the horizontal direction.

When the magnitude of the detected tilt is equal to or greater than the threshold value (S2: YES), the control unit 201 rotates the drive motor 31 to rotate the washing and dewatering tub 22 integrated with the pulsator 28 by half a turn (S3). At this time, the control unit 201 rotates the washing and dewatering tub 22 at a slower speed than when the rotation of the washing and dewatering tub 22 is started for dehydration.

Fig. 6 (a) is a view schematically showing a state of the fluid in the fluid balancer 27 after draining and the eccentric load in the washing and dewatering tub 22 when the main body of the fully automatic washing machine 1 is tilted, and Fig. 6 (b) is a schematic view The ground indicates the fluid in the fluid balancer 27 after the washing and dewatering tub 22 is rotated half a turn from the state of Fig. 6(a). And a diagram of a state in which the eccentric load in the dewatering tub 22 is washed. 6(a) and 6(b) show a state in which the washing and dewatering tub 22 is viewed from above.

When the main body of the fully automatic washing machine 1 is in an inclined state, as shown in FIG. 6(a), in the washing and dewatering tub 22, the fluid in the fluid balancer 27 is easily biased to the lower side. Further, at the time of draining before the dehydration process, as the water in the washing and dewatering tub 22 is discharged, the laundry floating in the water is easily biased by the action of gravity to the lower side in the washing and dewatering tub 22, and therefore, it can be considered that: As shown in Fig. 6(a), after the drainage, it is easy to cause an eccentric load of the laundry on the lower side of the washing and dewatering tub 22. When the washing and dewatering tub 22 is rotated by half a turn from such a state, the eccentric load is moved to the high side of the main body of the fully automatic washing machine 1, that is, the high side in the washing and dewatering tub 22. On the other hand, once the fluid moves to the upper side once, it will return to the lower side again. As a result, as shown in FIG. 6(b), the weight balance in the washing and dewatering tub 22 is improved in a state where the eccentric load and the fluid are disposed at the opposing positions.

The control unit 201 rotates the drive motor 31, starts the rotation of the washing and dewatering tub 22 to perform dehydration, and raises the number of revolutions to 120 rpm (S4). Since the inside of the washing and dewatering tub 22 is in a weight-balanced state as described above, it is possible to suppress the large lateral swing of the washing tub 20 due to resonance when the rotational speed of the washing and dewatering tub 22 passes through the lateral resonance point, that is, around 80 rpm.

When the main body of the fully automatic washing machine 1 is not in the inclined state, and the magnitude of the inclination is lower than the threshold (S2: NO), the control portion 201 does not rotate the washing and dewatering tub 22 by a half turn, but starts the rotation of the washing and dewatering tub 22, The rotation speed was raised to 120 rpm (S4). In the case where the main body of the fully automatic washing machine 1 is not in an inclined state, since the bias of the fluid and the eccentric load of the laundry as shown in FIG. 6(a) are not generated in the washing and dewatering tub 22, the washing dewatering bucket 22 is When the rotation speed passes near 80 rpm, the washing tub 20 does not easily swing largely laterally due to resonance.

When the rotation speed of the washing and dewatering 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 by the acceleration sensor 110 while maintaining the rotation speed at 120 rpm (S5). . Then, the control unit 201 determines whether or not the absolute value of the dynamic acceleration detected regardless of the direction of the dynamic acceleration, that is, positive or negative, is equal to or greater than the correlation threshold of the dynamic acceleration (S6). The control unit 201 determines whether the dynamic acceleration is detected and whether the absolute value of the detected dynamic acceleration is equal to or greater than the threshold value until a predetermined time elapses (S7).

When the washing and dewatering tub 22 is largely vibrated by the eccentric load or the like in the washing and dewatering tub 22, the vibration is transmitted to the holding plate 80 via the suspension 60 and the connecting portion 70. The retaining plate 80 is easily passed through the slide rail 100 It moves in the front-back direction, and therefore, the holding plate 80 may vibrate greatly in the front-back direction due to the transmission of the vibration. In such a case, the absolute value of the dynamic acceleration in the front-rear direction is likely to reach the threshold or more.

In addition, in the present embodiment, the dynamic acceleration in the horizontal direction is also detected. However, since the dynamic acceleration in the front-rear direction is generally larger than the horizontal direction, it is difficult to cause the absolute value of the dynamic acceleration in the left-right direction to reach the threshold or more. Happening. This makes it unnecessary to detect the dynamic acceleration in the left and right direction.

When the absolute value of the dynamic acceleration reaches the threshold or more (S6: YES), the control unit 201 stops the rotation of the washing and dewatering tub 22 (S8). Then, the control unit 201 performs a unwinding operation (S9). Specifically, the control unit 201 opens the water supply valve 51 to perform water supply, stores water in the washing and dewatering tub 22, and rotates the pulsator 28 to the left and right in a state where the washing and dewatering tub 22 is stopped. By this unwinding operation, the laundry is dispersed and the partial load is eliminated. After the water is discharged from the washing and dewatering tub 22, the control unit 201 returns to step S1 to restart the dehydration process.

When the predetermined time has elapsed (S6: YES) in the state where the absolute value of the dynamic acceleration is lower than the threshold (S7: YES), the control unit 201 raises the number of rotations of the washing and dewatering tub 22 to the maximum number of revolutions, for example, 900 rpm (S10). At this time, although the rotational speed of the washing and dewatering tub 22 passes through the longitudinal resonance point, that is, near 240 rpm, since the eccentric load in the washing and dewatering tub 22 is small, the washing tub 20 is less likely to undergo a large longitudinal swing due to resonance.

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

(Effect of the embodiment)

As described above, according to the present embodiment, the acceleration sensor 110 can be used to detect whether or not the main body of the fully automatic washing machine 1 is in an inclined state and whether the vibration of the washing tub 20 is large during dehydration, and can be used for suppressing washing according to each detection result. Dehydration control of the vibration of the tub 20. Thereby, the vibration of the washing tub 20 at the time of dehydration can be effectively suppressed.

Further, according to the present embodiment, in the case where the main body of the fully automatic washing machine 1 is in an inclined state, the weight balance between the fluid biased in the fluid balancer 27 and the eccentric load of the laundry in the washing and dewatering tub 22 is improved. Thereafter, the rotation of the washing and dewatering tub 22 is started to perform dehydration. Thereby, the washing and dewatering tub 22 does not easily vibrate greatly when it starts to work, otherwise the holding plate 80 and the door portion 90 are generated. The vibration is greatly vibrated in the front-rear direction, resulting in a sharp collision between the door portion 90 and the exterior casing 10. Further, when the rotational speed of the washing and dewatering tub 22 passes near the lateral resonance point, the washing tub 20 is less likely to largely oscillate laterally due to resonance.

Moreover, according to the present embodiment, when the vibration of the washing tub 20 is large at the time of dehydration, the rotation of the washing and dewatering tub 22 is stopped and the unwinding operation is performed. Thereby, the vibration of the washing tub 20 can be reduced when the dehydration is restarted. In particular, since the detection of the dynamic acceleration, that is, the detection of the vibration by the acceleration sensor 110, is performed in a state where the rotational speed of the washing and dewatering tub 22 is lower than the longitudinal resonance point, it is possible to prevent the washing tub of the washing and dewatering tub 22 from passing near the longitudinal resonance point. 20 Large longitudinal oscillation caused by resonance.

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 the above may be made in the embodiments of the present invention.

(Modification 1)

FIG. 7 is a flowchart showing a control operation at the time of the dehydration process of Modification 1. FIG. 8 is a flowchart showing a control operation of the balance adjustment operation in Modification 1.

In the above embodiment, when the main body of the fully automatic washing machine 1 is in an inclined state, it is considered that an eccentric load of laundry is generated on the lower side in the washing and dewatering tub 22, and the eccentric load is moved by rotating the washing and dewatering tub 22 by a half turn. On the highest side, the weight balance between the fluid biased to the lower side of the fluid balancer 27 and the eccentric load is improved.

On the other hand, in the present modification, the washing and dewatering tub 22 is slowly rotated and the position where the eccentric load is detected therebetween, and the washing and dewatering tub 22 is stopped so that the eccentric load is located on the high side of the main body of the fully automatic washing machine 1, whereby A balance adjustment operation for improving the weight balance between the biased fluid and the eccentric load is performed.

In the control operation of FIG. 7 of the present modification, the process of step S12 is executed instead of the process of step S3 in the control operation of FIG. 5 of the above-described embodiment.

When the magnitude of the inclination of the main body of the fully automatic washing machine 1 is equal to or greater than the threshold value (S2: YES), the control unit 201 performs the balance adjustment operation (S12).

Referring to Fig. 8, first, the control unit 201 starts the rotation of the washing and dewatering tub 22 at a speed at which the rotation is started to be slower for dehydration, and raises the number of revolutions to 20 rpm (S101). At this time, even if the weight balance between the fluid biased in the fluid balancer 27 and the eccentric load in the washing and dewatering tub 22 is not improved, since the washing and dewatering tub 22 slowly starts to rotate, the washing and dewatering tub 22 is hard to occur greatly. Swing, door 90 and A violent collision between the outer casings 10 is difficult.

Next, the control unit 201 maintains the rotational speed of the washing and dewatering tub 22 at 20 rpm, and simultaneously samples the dynamic acceleration in the front-rear direction by the acceleration sensor 110 for a predetermined time (for example, 15 seconds) (S102). The washing and dewatering tub 22 is rotated a plurality of times during a predetermined time, for example, five times when the predetermined time is 15 seconds.

FIG. 9 is a view schematically showing a state in which the eccentric load in the washing and dewatering tub 22 moves in accordance with the rotation of the washing and dewatering tub 22 in the balance adjusting operation. In Fig. 9, the washing and dewatering tub 22 is viewed from above, and the colored circle in the figure indicates the partial load of the laundry in the washing and dewatering tub 22.

In the balance adjustment operation, the washing and dewatering tub 22 is rotated clockwise. As shown by the circle A in Fig. 9, when the eccentric load passes through the right side of the main body of the fully automatic washing machine 1, the washing and dewatering tub 22 swings forward, and the holding plate 80 thus swings forward, and therefore, the direction detected by the acceleration sensor 110 The dynamic acceleration in front is the positive dynamic acceleration. Further, as shown by a circle C in FIG. 9, when the eccentric load passes through the left side of the main body of the fully automatic washing machine 1, the washing and dewatering tub 22 swings rearward, and the holding plate 80 thus swings rearward, and thus is detected by the acceleration sensor 110. The dynamic acceleration to the rear is the negative dynamic acceleration. Further, as shown by the circle B and the circle D in Fig. 9, when the eccentric load passes through the front side and the rear side of the main body of the fully automatic washing machine 1, the washing and dewatering tub 22 is difficult to swing in the front-rear direction, and the movement detected by the acceleration sensor 110 is dynamic. The absolute value of the acceleration is the smallest.

The control unit 201 extracts a positive maximum value, a negative maximum value, and an absolute value minimum value per rotation of the washing and dewatering tub 22 from the sampled dynamic acceleration, and based on these values, determines a positive position for determining the partial load. The maximum value, the negative maximum value, and the absolute value minimum value (S103). For example, the respective average values of the positive positive maximum value, the negative maximum value, and the absolute value minimum value may be set as the positive maximum value, the negative maximum value, and the absolute value minimum value for the determination. Alternatively, the minimum value of each of the positive positive maximum value, the negative maximum value, and the absolute value minimum value may be set as the positive maximum value, the negative maximum value, and the absolute value minimum value for the determination.

The control unit 201 determines which of the front, rear, left, and right sides of the main body of the fully automatic washing machine 1 is the high side based on the inclination of the main body of the fully automatic washing machine 1 detected in step S1 (S104). In the case where the front side of the main body of the fully automatic washing machine 1 is the high side (S104: front side), when the eccentric load in the washing and dewatering tub 22 passes through the front side of the main body of the fully automatic washing machine 1, the acceleration sensor 110 detects The absolute value of the dynamic acceleration is the subsequent minimum value after the dynamic acceleration reaches a positive maximum value. Thereby, the control unit 201 is When the absolute value of the dynamic acceleration detected by the acceleration sensor 110 is detected as the subsequent minimum value after the dynamic acceleration reaches the positive maximum value (S105: YES), the washing and dewatering tub 22 is urgently stopped by the brake (S109). For example, the control portion 201 can apply a brake to the washing and dewatering tub 22 by applying electromagnetic braking to the driving motor 31. In this manner, the washing and dewatering tub 22 is stopped in a state where the partial load is located on the high side of the main body of the fully automatic washing machine 1, that is, the front side.

On the other hand, when the rear side of the main body of the fully automatic washing machine 1 is the high side (S104: rear side), when the eccentric load in the washing and dewatering tub 22 passes through the rear side of the main body of the fully automatic washing machine 1, the acceleration sensor The absolute value of the detected dynamic acceleration of 110 is the subsequent minimum after the dynamic acceleration reaches a negative maximum. Thereby, the control unit 201 detects that the absolute value of the dynamic acceleration detected by the acceleration sensor 110 is the subsequent minimum value after the dynamic acceleration reaches the negative maximum value (S106: YES), and causes the washing dewatering tub 22 to be braked. Emergency stop (S109). Further, in the case where the left side of the main body of the fully automatic washing machine 1 is the high side (S104: left side), when the eccentric load in the washing and dewatering tub 22 passes through the left side of the main body of the fully automatic washing machine 1, it is detected by the acceleration sensor 110. The dynamic acceleration to is a negative maximum. Thereby, when the control unit 201 detects that the dynamic acceleration detected by the acceleration sensor 110 is a negative maximum value (S107: YES), the control dehydration tub 22 is suddenly stopped by the brake (S109). Further, in the case where the right side of the main body of the fully automatic washing machine 1 is the high side (S104: right side), when the eccentric load in the washing and dewatering tub 22 passes through the right side of the main body of the fully automatic washing machine 1, the acceleration sensor 110 The detected dynamic acceleration is a positive maximum. Thereby, when the control unit 201 detects that the dynamic acceleration detected by the acceleration sensor 110 is a positive maximum value (S108: YES), the control dewatering tub 22 is suddenly stopped by the brake (S109).

Thus, by performing the balance adjustment operation, the inside of the washing and dewatering tub 22 is placed on the high side in the washing and dewatering tub 22 with an eccentric load as shown in Fig. 6(b), and the fluid biased in the fluid balancer 27 is located in the washing and dewatering. The state of the lower side in the tub 22. Therefore, the weight balance between the biased fluid and the eccentric load becomes better.

As described above, according to the configuration of the present modification, the same operational effects as those of the above-described embodiment can be achieved. Further, in the present modification, the position of the eccentric load in the washing and dewatering tub 22 is detected, and the rotation of the washing and dewatering tub 22 is performed based on the detection result, so that the weight between the biased fluid and the eccentric load can be more favorably performed. Balanced adjustment.

(Other changes)

In the above embodiment, the acceleration sensor 110 is disposed on the holding plate 80. However, not limited to For example, the acceleration sensor 110 may be disposed in the door portion 90. Further, other members such as a metal fitting may be attached to the holding plate 80 and the door portion 90, and the acceleration sensor 110 may be disposed in the other member. In this case, the other members together with the holding plate 80 and the door portion 90 constitute the drawer portion of the present invention.

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

Further, as a structure for holding the washing tub 20, as shown in Fig. 10(c), a cabinet 80C having an open upper surface may be provided. In this case, the washing tub 20 is provided inside the cabinet 80C via the suspension 60. Further, a movable rail 102 is attached to a lower portion of the left and right sides of the cabinet 80C. The acceleration sensor 110 can be disposed, for example, on the bottom surface of the cabinet 80C or on the front, rear, left, and right sides. The cabinet 80C together with the door portion 90 constitutes the drawer portion of the present invention.

Moreover, in the above embodiment, in order to move the holding plate 80 holding the washing tub 20 in the front-rear direction, the slide rail 100 including the fixed rail 101 and the movable rail 102 is used. However, the sliding mechanism portion may be configured such that a roller is provided on a lower portion of the left and right inner side surfaces of the outer casing 10, and the roller is in contact with a rail provided on a bottom surface of the left and right holding plates 80. And rotating, whereby the track is transported in the front-rear direction.

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

Moreover, in the above embodiment, during the period in which the rotational speed of the washing and dewatering tub 22 is maintained at 120 rpm, that is, during the portion in which the rotation of the washing and dewatering tub 22 rises to the highest rotational speed, the dynamic acceleration is detected by the acceleration sensor 110, and based on The detected dynamic acceleration determines the magnitude of the vibration of the washing tub 20. However, it is also possible to adopt a configuration in which the dynamic acceleration is detected by the acceleration sensor 110 during the entire period in which the rotation of the washing and dewatering tub 22 rises to the highest rotational speed, or during a portion more than the above-described embodiment, and based on the detected The dynamic acceleration determines the magnitude of the vibration of the washing tub 20.

Moreover, in the above embodiment, the fully automatic washing machine 1 is exemplified, but the present invention is also applicable to A fully automatic washer-dryer with a drying function and a laundry function.

Further, the embodiments of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

Description of the reference numerals

1: fully automatic washing machine (washing machine);

10: external casing;

20: washing bucket;

21: outer barrel;

22: washing the dewatering bucket;

60: suspension;

80: retaining plate (drawer);

90: door (drawer);

100: slide rail (sliding mechanism portion);

110: an acceleration sensor;

201: Control unit.

Claims (3)

A washing machine characterized by comprising: The outer casing has an inlet and outlet on the front surface; a drawer portion that can enter and exit the outer casing through the inlet and outlet; a washing tub disposed on the drawer portion via a suspension, including a washing and dewatering tub having a fluid balancer and an outer tub rotatably containing the washing and dewatering tub; a sliding mechanism portion that linearly moves the drawer portion relative to the outer casing; An acceleration sensor disposed in the drawer portion; Control department, The control unit acquires the tilt of the washing machine body based on the static acceleration detected by the acceleration sensor, and performs first dehydration control based on the tilt, and based on the vibration of the drawer portion detected by the acceleration sensor and dehydrated The corresponding dynamic acceleration performs a second dehydration control. A washing machine according to claim 1, wherein As the first dehydration control, the control unit causes the eccentric load generated in the washing and dewatering tub to be located at a high side of the inclined washing machine body when the inclination of the washing machine body is greater than the relevant threshold of the tilting The rotation of the washing and dewatering tub is performed, after which the rotation of the washing and dewatering tub is started to perform dehydration. A washing machine according to claim 1 or 2, characterized in that As the second dehydration control, the control unit stops the rotation of the washing and dewatering tub when the dynamic acceleration detected by the acceleration sensor is greater than the relevant threshold of the dynamic acceleration, and then performs the dismounting The unwinding operation of the laundry in the dewatering bucket is washed.

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