JP2013027613A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing and drying machine capable of surely separating laundry from the inner surface of a peripheral wall of a drum in a short time.SOLUTION: A washing and drying machine comprises: a water tank elastically supported by a suspension in an outer case; a drum rotatably disposed in the water tank; means for supplying warm air to the inside of the drum; a motor rotating the drum; and a vibrating mechanism which vibrates the water tank in a resonant state with the drum being stopped after the dewatering operation.

Description

  Embodiments described herein relate generally to a washing dryer.

  In general, for example, a drum-type laundry dryer having a drying function performs a dehydration operation to remove moisture contained in the laundry to some extent before the drying operation is performed. As the amount of water dehydrated in this dehydration operation increases, the drying load in the drying operation is reduced, the drying time is shortened, and the energy required for drying is also reduced. Here, in order to increase the amount of dewatering in the dewatering operation, it is necessary to increase the rotational speed of the drum and apply a larger centrifugal force to the moisture in the laundry.

However, if the rotational speed of the drum is rapidly increased in a state of containing moisture, the laundry is strongly entangled with each other. And there exists a situation where it sticks to the inner surface of the surrounding wall which comprises the cylindrical cylindrical part of a drum, and it becomes difficult to peel off. In this state, uneven drying tends to occur, and the drying load may be increased. Moreover, when it is dried in a tangled state, deep wrinkles approach the laundry.
In order to improve this, after the final operation (before the start of drying operation), the drum is rotated alternately in one direction and the opposite direction every short time to loosen the laundry stuck to the drum inner surface. There is a countermeasure plan to perform the loosening operation multiple times.

Japanese Patent Laid-Open No. 9-253377

  In the conventional method described above, the unwinding operation (the process of peeling the laundry stuck to the drum) takes time because the unwinding operation is performed a plurality of times to alternately rotate the drum in one direction and the opposite direction every short time. There was a problem. In other words, there has been a problem that the reliability with respect to the laundry is lowered when the loosening process is performed in a short time or a small number of times.

  In view of this, a laundry dryer is provided that can reliably peel off the laundry stuck to the inner surface of the peripheral wall of the drum by a dehydrating operation.

  The washing and drying machine of the present embodiment includes a water tank elastically supported by a suspension in an outer box, a drum rotatably provided in the water tank, and hot air supply means for supplying hot air into the drum. A motor that rotationally drives the drum, and a vibration mechanism that vibrates the water tank in a resonance state when the drum is stopped after the dehydration operation is completed.

Longitudinal side view of the washing and drying machine according to the first embodiment Suspension vertical side view Vertical side view of vibration mechanism, motor and clutch part Longitudinal side view of the clutch part with the clutch engaged Longitudinal side view of the clutch part with the clutch disengaged Electrical configuration block diagram The figure which shows the relationship between the phase of an unbalance position, and q-axis current FIG. 1 equivalent view showing the second embodiment Front view of the vibration mechanism FIG. 9 equivalent diagram showing the third embodiment.

<First Embodiment>
Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 7. FIG. 1 shows the overall structure of the washing / drying machine. As shown in the figure, the outer box 1 has a box shape that forms the outer shell of the washing / drying machine, and a laundry doorway 2 is formed at the center of the front side (right side of the figure). A door 3 for opening and closing the entrance 2 is provided. In addition, an operation panel 4 is provided at the upper part of the front surface of the outer box 1, and a control device 5 for operation control is provided on the back side.

  Inside the outer box 1, a horizontal-axis cylindrical water tank 6 whose axis is directed in the front-rear direction is disposed. The aquarium 6 is elastically supported on a bottom plate portion 1a of the outer box 1 in an upwardly inclined state by a plurality of suspensions 7 (for example, only one pair shown on the left and right). A specific configuration of the suspension 7 of the present embodiment will be described later.

  A motor 8 made of, for example, a brushless DC motor is disposed at the center of the rear end side of the water tank 6. The motor 8 includes an outer rotor type rotor 8 a and a stator 8 b, and the stator 8 b is attached to the rear portion of the water tank 6 through a bearing bracket 9. The rotation of the rotor 8a (rotation of the motor 8) is transmitted to the drum 10 by a clutch 43 (see FIG. 3) described later.

  The drum 10 is disposed inside the water tub 6 and functions as a washing tub for storing laundry and a dehydration tub (also referred to as a rotating tub) for dehydrating the laundry. The drum 10 has a horizontal cylindrical shape whose axis is directed in the front-rear direction, and is supported in a tilted state that is coaxial with the water tank 6 and rises forward. The drum 10 is directly driven by using the motor 8 as a driving means in a state where the motor 8 and the drum 10 are connected by a clutch 43 described later. The drum 10 has a large number of small holes 11 that allow water and air to pass through the entire wall thereof, while the water tank 6 has a substantially non-porous shape and can store water. The drum 10 and the water tank 6 have openings 12 and 13 on their front portions. An annular bellows 14 is mounted between the opening 13 of the water tub 6 and the laundry entrance 2. Thereby, the laundry entrance 2 is connected to the inside of the drum 10 through the bellows 14, the opening 13 of the water tank 6, and the opening 12 of the drum 10. A drain pipe 15 is connected to the lowest part of the water tank 6 through a drain valve 15a.

  The washing / drying machine is provided with a drying unit 16 as hot air supply means from the back side of the water tank 6 to the upper side and the front side. The drying unit 16 is composed of a blower 18, a heating device 19, and a circulation duct 17 having a dehumidifying means (not shown). The drying unit 16 dehumidifies moisture in the air discharged from the water tank 6 and then heats it. The laundry in the drum 10 is dried by circulating the water back into the water tank 6.

  The configuration of the suspension 7 will be described with reference to FIG. The suspension 7 includes a damper 21. The damper 21 includes an annular upper yoke 23, a bobbin 24, and a lower yoke 25 in a cylinder 22 made of a magnetic material, and the bobbin 24 includes a coil 24a. A rod 26 made of a magnetic material is inserted into the hollow portions of the upper yoke 23, the bobbin 24, and the lower yoke 25 so as to be movable in the axial direction (vertical direction in FIG. 2).

  An upper portion that is a part of the rod 26 protrudes from the cylinder 22. The rod 26 is sealed between the upper yoke 23 and the lower yoke 25 by seal members 27 and 28. The inner diameters of the inner surfaces of the upper yoke 23, the bobbin 24, and the lower yoke 25 are formed slightly larger than the outer diameters of the rods 26. Accordingly, the inner surfaces of the upper yoke 23, the bobbin 24, the lower yoke 25 and the outer surface of the rod 26 are formed. Between the two, a space is formed in which the upper and lower ends are sealed by the sealing members 27 and 28, and the space is filled with a magnetorheological fluid 29.

The magnetorheological fluid 29 is, for example, a material in which ferromagnetic particles such as iron and carbonyl iron are dispersed in oil, and when a magnetic force is applied, the ferromagnetic particles form a chain cluster, resulting in a viscosity. It will rise.
A lead wire 30 for cutting off the coil 24a is led out to the cylinder 22. When the coil 24a is energized, a magnetic field is formed in the cylinder 22 and the viscosity of the magnetorheological fluid 29 increases. The damper force can be changed by this change in viscosity.

On the other hand, a compression coil spring 32 is mounted on an upper portion of the rod 26 outside the cylinder 22 between the spring retainer 31 and the upper end of the cylinder 22. A mounting portion 33 is provided at the lower end portion of the cylinder 22.
The suspension 7 configured in this manner has an attachment portion 33 attached to the bottom plate portion 1 a of the outer box 1 with an attachment plate 34, a cushion 35, and a nut 36, and an upper end portion of the rod 26 at the lower left and right sides of the water tank 6. Attached to the front and rear intermediate portions are a mounting plate 37, a cushion 38, and a nut 39 that project substantially horizontally from the outer surface of the water tank 6.

Each of the suspensions 7 described above elastically supports the water tank 6 from below in a form extending substantially in the vertical direction.
The vibration mechanism 40 shown in FIGS. 1 and 3 includes a disk-shaped mounting member 41 and an eccentric weight 42, and the motor 8 also includes a part (drive source) of the vibration mechanism 40. It is composed. The eccentric weight 42 is attached to a part far from the center of the attachment member 41. The attachment member 41 is attached to the outer surface of the rotor 8a so that the center of the attachment member 41 corresponds to the center of the rotor 8a of the motor 8. Accordingly, the eccentric weight 42 of the excitation mechanism 40 rotates integrally with the rotation of the rotor 8a.

  Here, the rotation of the rotor 8a can be switched between the case where the rotation of the rotor 8a is transmitted to the drum 10 by the clutch 43 and the case where the rotation is not transmitted. The clutch 43 and the configuration related thereto will be described. A hollow drum shaft 10a is rotatably provided on the bearing bracket 9 via bearings 44 and 45, and one end portion of the drum shaft 10a is connected to an end plate portion 10c of the drum 10 via a connecting member 10b. It is connected.

  As shown in FIGS. 3 to 5, the rotor 8a of the motor 8 has a support shaft 8d through a boss portion 8c at the center, and this support shaft 8d is inserted into the drum shaft 10a. The drum shaft 10a is rotatably supported. Ends of the drum shaft 10a and the boss portion 8c face each other in the axial direction, and serrations 10s and 8s are formed on the outer peripheral surfaces of the drum shaft 10a and the boss portion 8c. The serration 10s of the drum shaft 10a is mounted with a moving body 46 having a drum-side serration 46a that meshes with the serration 10s and is movable in the axial direction.

  The moving body 46 is formed with a motor side serration 46b that can mesh with the serration 8s of the rotor 8a. The motor side serration 46b is moved by the movement of the moving body 46 in the arrow A direction. The engagement with the serration 8s is released.

  Further, an engaging tooth 46c is formed at a portion of the moving body 46 facing the bearing bracket 9, and the bearing bracket 9 is formed with a locking tooth 9a that can be engaged with and disengaged from the engaging tooth 46c. Has been.

  Further, the bearing bracket 9 is provided with a sensor 47 having a clutch connection detection hole IC 47a and a clutch connection release detection hole IC 47b, and the moving body 46 is provided with a magnet (not shown). The clutch connection detection hall IC 47a outputs a detection signal when the moving body 46 is in the position (connection position) of FIGS. 3 and 4, and the clutch is detected when the moving body 46 is in the position (connection release position) of FIG. The disconnection detection hall IC 47b outputs a detection signal.

The moving body 46 is moved to the connection position and the connection release position by a moving body drive mechanism 48 operated by a geared motor 48a (see FIG. 6).
The above-described serrations 10s and 8s, the moving body 46, the engaging teeth 46c, the locking teeth 9a, the sensor 47, and the moving body drive mechanism 48 constitute a clutch 43.

  3 and 4, the motor-side serration 46b of the moving body 46 is engaged with the serration 8s of the rotor 8a, and the drum-side serration 46a is connected to the drum shaft 10a. The engagement teeth 46c and the locking teeth 9a are separated (not engaged) with the serration 10s, and the rotor 8a is connected to the drum 10.

When washing, dehydrating, and drying the laundry, the control device 5 controls the geared motor 48a so that the clutch 43 is in a connected state.
Further, as shown in FIG. 5, when the moving body 46 is moved to the disengagement position (when the clutch 43 is disengaged), the motor side serration 46b of the moving body 46 and the serration 8s of the rotor 8a are separated ( The drum side serration 46a and the serration 10s of the drum shaft 10a remain in meshing state, and the engaging teeth 46c engage with the locking teeth 9a. The connection is released, and the drum shaft 10a and thus the drum 10 are stopped.

  FIG. 6 is a block diagram showing an electrical configuration. The control device 5 is mainly composed of a microcomputer, and is a control means for controlling the overall operation of the washing machine including the washing process to the drying process for washing, dehydrating and drying the laundry in the drum 10. The control device 5 includes, for example, a ROM 51a, a RAM 51b, and an EEPROM 51c as storage means. The ROM 51a stores a control program and various data for controlling the entire operation such as a washing operation in the washing machine.

  The control device 5 includes various operation signals from an operation unit 52 including various operation switches of the operation panel 4, a rotation detection signal from a rotation sensor 53 provided to detect the rotation of the motor 8, A current detection signal, a signal from the sensor 47, and the like are input from a current sensor 54 provided to detect a flowing current. Based on the detection signal from the rotation sensor 53, the control device 5 performs a calculation to divide the number of rotations of the motor 8 (drum 10) by the required detection time, and detects the rotation speed of the drum 10 based on the calculation. Further, the control device 5 calculates a q-axis current described later based on the current detection signal from the current sensor 54.

  The control device 5 performs vector control on the motor 8. In the vector control, the current flowing through the armature winding is separated into the magnetic flux direction of the permanent magnet, which is a field, and the direction orthogonal thereto, and these are adjusted independently to control the magnetic flux and the generated torque. For the current control, a current value represented by a coordinate system rotating with the rotor 8a of the motor 8, that is, a so-called dq coordinate system is used. The d axis is a magnetic flux direction formed by a permanent magnet attached to the rotor. Is a direction orthogonal to the d-axis. The q-axis current that is the q-axis component of the current flowing through the winding is a component that generates rotational torque (torque component current), and the d-axis current that is the d-axis component is a component that creates magnetic flux (excitation or magnetization component). Current). Therefore, an unbalanced load (that is, an unbalanced state) due to the unbalance of the laundry in the drum 10 occurs, and the q-axis current increases as the rotational torque increases. Therefore, it is possible to detect the magnitude of torque fluctuation of the motor 8 and thus the unbalance based on the magnitude of the q-axis current. That is, it has an unbalance detection function.

  Here, in FIG. 7, the position where the laundry is unevenly distributed in the drum 10 is defined as 0 degree, and the torque fluctuation when the drum 10 rotates, for example, in the clockwise direction when viewed from the front is equivalent to two rotations (360 degrees × 2). Show. The torque indicated by the curve T in the figure is maximum at 180 degrees when the laundry in the drum 10 is at the uppermost position and 360 degrees (0 when the laundry is at the lowermost position) in relation to the gravity acting on the laundry. Degree).

  Accordingly, in a state where the laundry is stuck to the inner surface of the drum 10 peripheral wall, it is possible to detect a location where the laundry is unevenly distributed on the inner surface of the drum 10 (referred to as an unevenly distributed location). Yes, that is, the control device 5 has means for detecting a large amount of unevenly distributed laundry in the drum 10. The control device 5 also has means for controlling the rotation of the motor 8 with respect to the drum 10 so that the laundry uneven distribution position is located above the drum 10.

  Further, since the torque fluctuates so as to draw a periodic curve for each rotation of the drum 10 as shown in the figure, an unbalanced phase can be detected. Thus, the current sensor 54 and the control device 5 are configured as torque fluctuation detecting means for detecting torque fluctuation of the motor 8 and rotation period detecting means for detecting the rotation period of the drum 10.

  Then, the control device 5 supplies water into the water tank 6 and the display unit 55 for displaying the setting contents based on the above-described input signal and detection signal and the control program and data stored in the ROM 51a and EEPROM 51c in advance. A water supply valve 56 provided in the motor, the motor 8, the drain valve 15a, a blower motor 18b (see FIG. 1) for driving the blower blades 18a (see FIG. 1) of the blower 18, and a heater 19a (same as above). The driving control signal is given to the driving circuit 57 that drives the coil 24a and the geared motor 48a.

  Here, the vibration system of the washing / drying machine of this embodiment is composed of the suspension 7 and the supported object (water tank 6 and components accompanying it) supported by the suspension 7, and the suspension 7 is elastic in the vertical direction. Since the aquarium 6 and the like are supported, a vibration system that resonates in the vertical direction, which mainly vibrates in the vertical direction, is configured.

  Now, the control device 5 performs control so as to execute the vibration operation between the dehydration operation and the drying operation. First, the dehydration operation will be described. In this dewatering operation, the clutch 43 is in the connected state shown in FIGS. 3 and 4 and raises the motor 8 and thus the drum 10 to a preset target dewatering rotation speed (for example, 1500 rpm). In this dehydration operation, there is a concern that the eccentric weight 42 also rotates together with the drum 10, so that unbalanced rotation occurs, but the mass of the drum 10 is large (the mass ratio of the eccentric weight 42 to the drum 10 is small), Not so much imbalance. Further, the control device 5 performs an unbalance reduction process, and this does not cause a large unbalance. That is, when the imbalance is large in the initial stage of dehydration, the rotation of the drum 10 is reduced or stopped (this is expected to change the distribution of the laundry), is raised again, and the imbalance is detected again. The weight of the weight 42 is also regarded as the weight of the laundry, and the overall imbalance is reduced. This unbalance is detected as an unbalance when the torque is larger than a predetermined threshold value, and is detected as being unbalanced when the torque is smaller than the threshold value even if there is a relatively small unbalance.

  In this dehydration operation, the damper force of the damper 21 of the suspension 7 is increased (the coil 24a is energized) at a rotational speed equal to or lower than the resonant rotational speed (approximately 200 to 250 rpm) of the drum 10 corresponding to the resonant frequency of the water tank 6. In this way, it is possible to overcome the imbalance while suppressing the occurrence of vibration, and if the resonance rotational speed (resonance frequency) is exceeded, the damper force is weakened (the coil 24a is disconnected).

When the above-described dehydration operation is completed, the laundry may be stuck to the inner surface of the peripheral wall of the drum 10 in a ring shape.
At the end of the dehydration operation, the control device 5 controls the rotation of the motor 8 so that the laundry mass uneven distribution position is located above the drum 10, and the clutch 43 is brought into the disengaged state of FIG. The rotation of the motor 8 is not transmitted to the drum 10 and the drum 10 is stopped. Then, the damper force of the suspension 7 is weakened (the coil 24a is disconnected). Since the damper force of the suspension 7 is weakened, the rod 26 moves easily, the compression coil spring 32, which is a spring in the vibration system, functions sufficiently, and the vibration system easily vibrates. That is, if the damper force is large, the movement of the rod 26 is suppressed, and the rod 26 cannot move so much by light vibration in the vertical direction, and this rod 26 suppresses the expansion / contraction action (spring force) of the compression coil spring 32. Although the vibration system is difficult to vibrate, the expansion / contraction action of the compression coil spring 32 can be sufficiently exerted by weakening the damper force, and the vibration system is likely to vibrate.

  Then, a vibration operation by the vibration mechanism 40 is performed. That is, the motor 8 is rotated at a rotation speed (approximately 200 to 250 rpm, and a frequency is approximately 3.3 to 4.1 HZ) at which the water tank 6 is close to the resonance frequency. Then, the unbalanced rotation of the motor 8 including the eccentric weight 42 resonates with the vibration system (water tank 6 and the compression coil spring 32 of the suspension 7) of the washing / drying machine, and the entire water tank 6 including the drum 10 enters a resonance state. Especially, it vibrates greatly in the vertical direction.

  The laundry stuck to the inner surface of the peripheral wall of the drum 10 is peeled off from the inner surface of the peripheral wall of the drum 10 by the large resonance vibration. In particular, a large amount of laundry positioned in the upper part of the inner peripheral wall of the drum 10 is reliably peeled off in a short time due to large vertical vibrations and dead weight, and the laundry in other parts is also peeled off in conjunction with this.

After such a vibration operation, the control device 5 intermittently rotates the motor 8 forward and backward, and drives the blower 18 and the heating device 19 to execute a drying operation.
According to such an embodiment, the laundry stuck to the inner surface of the peripheral wall of the drum 10 by the dehydration operation is the state where the drum 10 is stopped after the dehydration operation is finished, and the water tank 6 is moved at the substantially resonant frequency by the vibration mechanism 40. Since the vibration is applied, the resonance of the water tub 6 can be used to vibrate in a resonance state, and the vibration sufficient for peeling the laundry can be applied to the water tub 6 and thus the drum 10, so that the laundry can be reliably and quickly obtained. Can peel. Therefore, it is possible to shift from the dehydrating operation to the drying operation in a short time, and the time required for the entire washing to drying operation can be shortened. And since it can peel reliably from the inner surface of the drum 10 in this way, there is no problem even if the target dehydration rotational speed is increased, and it is possible to prevent wrinkles accompanying the sticking of the laundry to the inner surface of the drum 10. . It should be noted that the drum 10 may be in a state of rotating a little even if it is not completely stopped.

  Further, according to this embodiment, the suspension 7 is configured to include the damper 21 that can change the damper force. According to this, by increasing the damper force of the damper 21, it is possible to achieve an unbalanced ride over the drum 10 at the resonance rotational speed or less of the drum 10 during the dehydrating operation. However, in a state where the damper force is increased as it is, the vibration system is suppressed during the vibration operation by the vibration mechanism 40. In this regard, in this embodiment, since the damper force is weakened during the vibration operation of the vibration mechanism 40, the vibration system in the washing / drying machine is likely to vibrate, and the water tank 6 vibrates during vibration at the resonance frequency. Can sufficiently resonate, and the laundry peeling effect is improved.

  In this embodiment, the water tank 6 is supported substantially vertically by the suspension 7, and the vibration system including the water tank 6 is configured as a vibration system that resonates in the vertical direction. At times, the water tank 6 and thus the drum 10 can be vibrated greatly in the vertical direction, and the effect of peeling the laundry can be enhanced.

  In this embodiment, the vibration mechanism 40 includes an eccentric weight 42 that is rotated by the motor 8, and a clutch 43 that can switch between the case where the rotation of the motor 8 is transmitted to the drum 10 and the case where the rotation is not transmitted. In addition, the clutch is switched so as not to transmit the rotation of the motor 8 to the drum 10, and the eccentric weight 42 is rotated at the resonance frequency to vibrate the water tank 6.

  Thus, the water tank 6 can be vibrated in a resonance state by rotating the eccentric weight 42 at a substantially resonance frequency. In addition, in this case, the motor 8 for rotating the drum 10 can be used for driving the eccentric weight 42, and it is not necessary to separately provide a vibration motor. In this case, the clutch 43 also has a function of fixing the drum 10 to the rotation stopped state in the clutch switching state in which the rotation of the motor 8 is not transmitted to the drum 10, so that it is not necessary to separately provide a configuration for stopping the drum 10.

In addition, as a vibration mechanism provided with an eccentric weight, a dedicated motor may be provided without using the motor 8 for rotating the drum 10, and in this case, the clutch 43 may not be provided.
Further, according to this embodiment, the control device 5 is provided with means for detecting a location where the laundry is unevenly distributed in the drum 10 during dehydration, and the location where the laundry is unevenly distributed is positioned above the drum 10. In the state where 10 is stopped, the vibration operation by the vibration mechanism 40 is performed. According to this, when the laundry is vibrated in a state where a large amount of laundry is distributed above the inner surface of the peripheral wall of the drum 10, the upper laundry is reliably peeled off in a short time due to large vertical vibrations and dead weight. The laundry in the other part is also peeled off and the peeling effect of the laundry is further enhanced. However, this is not always necessary, as long as the upper laundry is distributed so that it falls and the laundry in other parts is peeled off.

Second Embodiment
8 and 9 show the second embodiment, and the configuration of the vibration mechanism and the configuration related thereto are different from those of the first embodiment. In the second embodiment, a vibration mechanism 61 is provided instead of the vibration mechanism 40. The vibration mechanism 61 is configured to vibrate the water tank 6 from the outside. That is, the vibration mechanism 61 includes a motor 62 as a drive source, and the motor 62 is disposed on the bottom plate 1 a of the outer box 1. A rotating plate 63 is connected to the rotating shaft of the motor 62, and one end of a connecting member 64 is rotatably connected to an eccentric part of the rotating plate 63. The other end of the connecting member 64 is rotatably connected to a mounting member 65 provided at the lower part of the outer surface of the water tank 6.

In this vibration mechanism 61, when the motor 62 is rotated at 200 to 250 rpm, for example, at a frequency and rotation speed at which the water tank 6 resonates, the connecting member 64 moves substantially up and down, and the water tank 6 is moved particularly vertically. By moving (vibrating), the water tank 6 and the drum 10 are resonated in the vertical direction.
In the second embodiment, since the vibration mechanism 40 is not provided in the motor 8, the clutch 43 is not provided, and the rotation shaft of the motor 8 is connected (directly connected) to the drum 10.

  Further, in the second embodiment, in addition to the vibration mechanism 61, a vibration mechanism 71 that performs auxiliary vibration is also provided. The vibration mechanism 71 has substantially the same configuration as that of the vibration mechanism 61 but is configured to move (vibrate) the water tank 6 in a substantially front-rear direction. That is, the vibration mechanism 71 includes a motor 72 as a drive source, and the motor 72 is disposed at the rear portion of the outer box 1. A rotating plate 73 is connected to the rotating shaft of the motor 72, and one end of a connecting member 74 is rotatably connected to an eccentric part of the rotating plate 73. The other end of the connecting member 74 is rotatably connected to an attachment member 75 provided on the rear portion of the outer surface of the water tank 6.

When the motor 72 is rotationally driven, the vibration mechanism 71 vibrates the water tank 6 substantially in the front-rear direction. In this case, the vibration mechanism 71 may be operated at the same time as the vibration mechanism 61. Also in that case, the motor 72 may be rotated at a rotation speed (frequency) that causes the water tank 6 to be in a resonance state.
According to the second embodiment, the water tank 6 and thus the drum 10 can be directly vibrated in the vertical direction at a substantially resonant frequency by the vibration mechanism 61, and the laundry can be peeled off in a short time and reliably.
Further, according to the second embodiment, since the vibration mechanism 71 that vibrates in the front-rear direction is provided, the water tank 6 can be directly vibrated in the front-rear direction at a substantially resonant frequency by the vibration mechanism 71. The isolation effect of the laundry is further increased.

<Third Embodiment>
FIG. 10 shows a third embodiment in which a connecting member 81 is provided in place of the connecting member 64 of the vibration mechanism 61 and the connecting member 74 of the vibration mechanism 71 (only the connection member 81 of the vibration mechanism 61). (Illustrated). The connecting member 81 is composed of a damper. The damper has the same structure as the damper 21 and the damper force is variable. Except during the vibration operation of the vibration mechanisms 61 and 71, the damper force is weakened so that the rod 81a can move substantially freely with respect to the cylinder 81b, so that the elastic support function of the suspension 7 is not hindered. During the vibration operation, the damper force is increased so that the rod 81a does not move relatively with respect to the cylinder 81b. In other words, the connecting member 81 is made substantially rigid so that the vibration operation can be performed without any trouble.
As described above, in the third embodiment, the elastic support function of the suspension 7 can be prevented from being disturbed except when the vibration mechanisms 61 and 71 are in the vibration operation.
The vibration mechanism 71 may be provided as necessary.

  According to the washing and drying machine of the embodiment described above, after the dehydration operation is completed, the drum is stopped and the vibration tank is vibrated in the resonance state, so that the washing is performed using the resonance of the water tank. The vibration sufficient for peeling off the object can be given to the water tank and the drum, and the laundry can be peeled off from the inner surface of the drum reliably in a short time.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and equivalents thereof.

  In the drawings, 1 is an outer box 1, 5 is a control device, 6 is a water tank, 7 is a suspension, 8 is a motor, 10 is a drum, 16 is a drying unit (hot air supply means), 21 is a damper, 22 is a cylinder, 29 Is a magnetorheological fluid, 32 is a compression coil spring, 40 is an excitation mechanism, 41 is an attachment member, 42 is an eccentric weight, 43 is a clutch, 46 is a moving body, 48 is a moving body drive mechanism, 61 is an excitation mechanism, 62 Denotes a motor (drive source), 64 denotes a connecting member, and 71 denotes an excitation mechanism.

Claims (8)

A water tank elastically supported by a suspension in the outer box;
A drum rotatably provided in the water tank;
Hot air supply means for supplying hot air into the drum;
A motor for rotationally driving the drum;
A washing / drying machine comprising: a vibration mechanism that vibrates the water tank in a resonance state when the drum is stopped after completion of the dehydration operation.   The washing / drying machine according to claim 1, wherein the suspension includes a damper capable of changing a damper force, and the damper force is weakened during the vibration operation of the vibration mechanism.   The washing / drying machine according to claim 1 or 2, wherein the vibration system including the water tank is configured as a vibration system that resonates in a vertical direction.   The excitation mechanism includes an eccentric weight rotated by the motor, and includes a clutch capable of switching between the case where the rotation of the motor is transmitted to the drum and the case where the rotation is not transmitted to the drum. The washing / drying machine according to any one of claims 1 to 3, wherein the eccentric weight is rotated to vibrate the water tank in a resonance state as a switching state in which the rotation of the water is not transmitted.   The washing and drying machine according to any one of claims 1 to 3, wherein the vibration means is configured to vibrate the water tank from the outside.   The said vibration excitation mechanism is provided with the connection member connected with the said water tank, and the drive source which is provided in the said outer box and vibrates the said water tank via this connection member. Laundry dryer.   The washing / drying machine according to claim 6, wherein the connecting member includes a damper capable of changing a damper force, and the damper force is increased and the others are decreased during the vibration operation of the vibration mechanism.   A means for detecting a location where the laundry is unevenly distributed in the drum at the end of the dewatering operation is provided, and the vibration is generated by the vibration mechanism while the drum is stopped so that the location where the laundry is unevenly distributed is located above the drum. The washing / drying machine according to any one of claims 5 to 7, wherein the washing / drying machine is characterized in that a product is made to work.

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