JP2895948B2 - Washing and drying machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a washing / drying machine that rotates a washing tub disposed in an outer tub to execute a washing step, a rinsing step, a dehydrating step, and a drying step.

[Prior Art] An outer tub is supported in a frame, and a synthetic resin drum which is a horizontal axis type washing tub is rotatably or rotatably supported in the outer tub, and the drum is reciprocated at a low speed. The washing step and the rinsing step are performed, and the drum is rotated at a high speed to perform a dehydration step. The drying step is performed by blowing warm air heated by a heater into the drum while rotating the drum. A drum type washing / drying machine to be executed is disclosed in Japanese Utility Model Publication No. 52-49570.

In such a washing / drying machine, the washing process, the rinsing process, the dehydrating process, and the drying process as described above are sequentially performed to automatically perform the washing and drying of the clothes.

[Problems to be solved by the invention]

However, in the washing and drying machine as described above, the clothes adhere to the inner peripheral wall of the drum due to the centrifugal force during the dehydration in the dehydrating step, and the clothes remain attached to the inner peripheral wall of the drum after the completion of the dehydrating step. Since the drying step is performed in the state described above, there is a problem that the clothes may be dried with wrinkles.

The present invention has been made in view of such circumstances, and a washing / drying machine that suppresses wrinkling of clothes due to drying by performing a drying step after performing control of peeling clothes from a drum after completion of a dewatering step. The purpose is to provide.

[Means for solving the problem]

A washing / drying machine according to the present invention includes an outer tub and a washing tub rotating inside the outer tub, and sequentially executes a washing step, a rinsing step, a dehydrating step, and a drying step in the washing tub. In the washing / drying machine, after the dehydration step is completed, the washing tub is alternately rotated forward and backward to peel off the laundry from the inner wall of the washing tub, and thereafter, the drying step is performed. Features.

[Action]

In the dehydration step, the laundry in the washing tub sticks to the inner wall of the washing tub due to centrifugal force during dehydration. After the dehydration step, if the washing tub is alternately rotated forward and backward, the normal rotation (or reverse rotation) is performed. ) To reverse (or forward) rotation, the laundry stuck to the inner wall of the washing tub is loosened and separated from the inner wall by the impact force applied to the laundry. Thereafter, in the subsequent drying step, the laundry loosened in the washing tub is dried.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments.

FIG. 1 is a schematic perspective view of a washing and drying machine according to the present invention. In the drawing, reference numeral 1 denotes a bottomed prismatic sheet-metal frame. The front edge of the upper surface of the frame 1 is a synthetic resin upper plate provided with a keyboard 11 on which devices such as electronic components are accommodated and various operation keys to be operated later are arranged on the upper surface. An operating portion 9a is provided on the rear edge of the upper surface of the frame 1 as a housing portion which is a synthetic resin upper surface plate for housing devices such as a water supply device.
9b are respectively formed by expansion. In addition, a rectangular upper clothing input port 10a is opened between the operation unit 9a and the accommodation unit 9b on the upper surface of the frame 1, and the upper clothing input port 10a is moved in a direction indicated by a white arrow in the figure. Open / close synthetic resin lid
14 are provided. An outer tub 2 which is a water tank made of a synthetic resin formed in the shape of a horizontal axis drum is disposed inside the frame 1, and a horizontal axis type drum made of a synthetic resin which is a washing tub is provided in the outer tub 2. 3 is disposed coaxially with the outer tub 2 so as to be rotatable and rotatable.

FIG. 2 is a longitudinal sectional view of the outside of the outer tub 2 of the washing and drying machine according to the present invention as viewed from the front. The outer tub 2 has a horizontal drum shape in which a bottom 2c has a flat shape, a side 2b is curved outward, and an upper 2a projects upward in a rectangular cylindrical shape.
In the upper part 2a, an intermediate clothing input port 10b is opened.
The upper garment inlet 10a and the middle garment inlet 10b are watertightly connected by a rubber packing 12. Horizontal supports 20, 20 having a flat bottom surface are formed at the lower portion of the side portions 2b, 2b of the outer tub 2, and an iron mounting plate 29 is formed on the bottom surface of the horizontal support portions 20, 20. , 29 are fixed. In the frame 1, the upper portions of the side portions 2b of the outer tub 2 are elastically suspended and supported from the upper four corners of the frame 1 by upper supports 5, 5,.
On the other hand, the lower part of the outer tub 2
Lower support made of an elastic member disposed between the bottom and the bottom
Supported by 6,6 ... Also, the upper support
In the vicinity of one of 5, 5,..., The abnormal vibration including a micro switch which is turned on and off by the vibration of the drum 3 in response to the vibration of the upper support 5 and captures the large vibration of the upper support 5 as the vibration of the drum 3. A vibration switch 102 is provided. The ON / OFF signal of the abnormal vibration switch 102 is provided to a first microcomputer 100 described later. The first microcomputer 100 outputs a signal when the interval of the OFF time of the signal is longer than a predetermined time. A process of regarding the vibration of the drum 3 as abnormal vibration is performed.

At the center of the front wall of the outer tub 2, a heater casing 40 having a substantially teardrop shape in a front view is disposed. Heater casing
In the heater casing 40, three mounting brackets 41, 41, 41 are inserted into the inside of the heater casing 40 from outside thereof.
A drying heater 4 having a heating element formed in a horseshoe shape along the side wall of the heater 40 is fixed in the heater casing 40 by these mounting brackets 41, 41, 41. A circulation duct 21 that extends upward and communicates with the inside of the outer tub 2 through a circulation port (not shown) that opens in the front wall of the outer tub 2 is integrally formed on the left side of the heater casing 40 when viewed from the front. . A blower fan 22 is provided above the circulation duct 21.
A connection pipe 42 is provided between the upper part of the heater and the heater casing 40, and the inside of the circulation duct 21 and the inside of the heater casing 40 communicate with each other via the connection pipe 42.

On the right side of the heater casing 40 when viewed from the front, there is provided an overflow chamber 23 for drawing out overflow from an overflow port (not shown) opened at a height of 1/2 of the front wall. ,
An overflow hose 230 for draining the overflow in the overflow chamber 23 is connected to the bottom of the overflow chamber 23. An air trap for detecting a water level in the outer tub 2 is provided at a lower portion outside the front wall of the outer tub 2.
24 are integrally formed. This air trap 24 is connected via a pressure hose 26 to a water level detector 25 arranged near the operation section 9a. The water level detector 25 detects a change in the water level in the outer tub 2 as a pressure change in the air trap 24, and moves the magnetic body in the coil according to the pressure change. As a result, the water level change indicates the inductance of the coil. This is detected as a change.

At the bottom of the outer tub 2, there is provided a drain port 71 having a drain port (not shown) for draining water in the outer tank 2, and the drain port 71 is provided with drainage from the drain port 71. Is connected to a drain hose 72 for leading the air out of the machine. This drain hose
The overflow chamber 23 is connected to the overflow chamber 23 through an overflow hose 230.
Is drawn out of the aircraft. A drainage motorized valve 73 for opening and closing the drainage port of the drainage port 71 is provided between the drainage port 71 and the drainage hose 72, and is disposed below the outer tub 2 as is well known. The valve is opened by winding the wire with the rotational force of the drain motor 79,
By cutting off the rotational force, the valve returns to the closed state by the urging force of a spring (not shown).

In addition, a double water supply solenoid valve 8 is provided in the housing portion 9b (see FIG. 1). The water supply solenoid valve 8 has a first water supply hose 26 having one end connected to the side wall of the upper portion 2a of the outer tub 2 and a second water supply hose (FIG. 1) having one end connected to the front wall of the upper portion 2a of the outer tub 2. (Not shown) is connected. The water supplied from the water supply electromagnetic valve 8 is supplied into the outer tub 2 via the first water supply hose 26 and the second water supply hose, and travels along the inner wall of the outer tub 2 to reach the drain port 71.

FIG. 3 is a longitudinal sectional view of the inside of the drum 3 of the washing and drying machine according to the present invention as viewed from the front, and FIG. 4 is a longitudinal sectional view of the inside of the drum 3 as seen from the side.

The drum 3 includes a cylindrical body 31 having a horizontal axis and a bottom and a cylindrical body.
The fluid balancer 32 is mounted on the opening side of the fluid balancer 31 and the front plate 33 is fixed to the outside of the fluid balancer 32. It is arranged in the tank 2. At the center of the front plate 33, a suction port 34, which is formed as an axial fan that also serves as a filter, for absorbing dry air, is formed so as to protrude. In the center of the suction port 34, a support shaft serving as a rotation shaft on the front side of the drum 3 is provided.
One end of the drum 35 is fixed, while the other end of the drum 3 is provided at the center of the end surface of the body 31 on the opposite side to which the front plate 33 is fixed. One end of a support shaft 36 serving as a rotation shaft is fixed. The other end of the support shaft 35 is a front bearing disposed in the center of the heater casing 40.
The other end of the support shaft 36 is supported by a rear bearing 360 disposed in the center of the rear wall of the outer tub 2, and the drum 3 is supported by the support shaft 35 and the support shaft 36. Is rotatable and rotatable around.

On the inner peripheral surface of the body 31 of the drum 3, baffles 31 a, 31 b, 31 having a triangular cross section formed to bulge toward the axis of the body 31.
c are arranged in three equal parts, and the baffles 31a, 31b, 31c are configured to scrape clothes in the drum 3 when the drum 3 rotates and rotates. Also, lateral ribs 301 extending in the axial direction of the drum 3 are provided on the inner peripheral surface and the outer peripheral surface of the body 31 of the drum 3.
A large number of 301s are formed. Further, a large number of through holes 302, 302,...
The supply and discharge of water to and from the drum 3 are performed via 02,.

Further, a recess 31d formed by reducing the diameter of an arc portion having a central angle of 120 degrees in the body 31 is provided on the outer periphery of the body 31. The bottom of the recess 31d is formed at the bottom of the recess 31d. The lower clothing slot 10c, which has a rectangular shape in plan view and occupies approximately half the area of
Has been established. On the leading edge and trailing edge of the recess 31d,
Sliding grooves 390, 390 for slidably mounting a synthetic resin lid 38 for opening and closing the lower clothing inlet 10c extend in the circumferential direction. The slide grooves 390, 390 are formed by attaching strip-shaped slide covers 392, 392 to the upper portions of the ridges 391, 391 provided in the circumferential direction of the body portion 31, respectively. The lid body 38
Are supported in the slide grooves 390, 390 and slide grooves 390, 3
By sliding in the inside 90, the lower clothing inlet 10c is opened and closed. A disengagement mechanism for locking and releasing the lid 38 when the lower clothing input port 10c is closed by the lid 38 between one side edge of the lid 38 and the edge of the lower clothing input port 10c. 37 are provided. At the center of the upper surface of the lid 38, a storage section 380 for storing a laundry treatment agent such as a detergent, a bleaching agent and a softening agent is formed in advance.

As described above, the drum 3 is supported by the front bearing 350 and the rear bearing 360 by the support shaft 35 and the support shaft 36.
The shaft end of the rear bearing 360 projects outward from the rear wall of the outer tub 2, and a drive pulley 74 is attached to the shaft end. A motor 75, which is a three-phase induction motor, which is a power source of the drum 3, is provided outside the bottom surface of the outer tub 2.
The driving shaft of the motor 75 and the driving pulley 74
Are connected via A magnet 77 is mounted on the outer tub 2 side of the drive pulley 74, and a reed switch 78 is disposed at a position facing the magnet 77 on the outer surface of the rear wall of the outer tub 2. Is the drive pulley 74
With the rotation of, the magnet 77 closes when the magnet approaches, and opens when the magnet 77 separates. That is, if the reed switch 78 is opened and closed once, the drum 3 has rotated once.

Further, a drum temperature detector 43 composed of a thermistor for detecting the temperature of the drum 3 by detecting the temperature of the mounting bracket 41 is mounted on any one of the mounting brackets 41, 41, 41. Further, a heater 27 having a heating element mounted parallel to the bottom surface is fixed to the bottom of the outer tub 2 by a heater mounting bracket 270 for the heater.
The water heater 27 is used when washing with hot water, and warms the water in the outer tub 2. A water temperature detector 28 that detects the temperature of the water in the outer tub 2 by detecting the temperature of the heater mounting bracket 270 is attached to the heater mounting bracket 270.

FIG. 5 is a plan view of the keyboard 11 of the operation unit 9a. In the figure, reference numeral 117 denotes a reservation key group composed of a plurality of keys operated to make a driving reservation for starting driving at a predetermined time, and behind the reservation key group 117, a reservation time and a keyboard 11 Display screen 11 that displays errors in input information and control malfunctions during operation as error messages
8 are provided.

Further, on the right side of the reservation key group 117, a water temperature setting key 111a for setting a water temperature (water temperature value, 35 ° C., 45 ° C.) in the outer tub 2, a washing process time (5 minutes, 10 minutes, 15 minutes) , A rinse time setting key 111b for setting the number of rinses (two, three, five times), a dehydration force setting key 111d for setting the dehydration power (strong, medium, weak), and drying The heater output setting keys 111e for setting the output (strong, medium, weak) of the heater 4 are arranged in a row. A washing course setting key 113a for setting a washing course (standard, wool,...) Corresponding to the type of clothing and the like and a finished state of drying are set at a position on the right side of the heater output setting key 111e at an appropriate distance. The drying course setting keys 113b are arranged in a row.

Further, the water temperature setting key 111a, the washing time setting key 111b,
Information selected by these keys is displayed after the keys of the rinsing number setting key 111c, the dehydration power setting key 111d, the heater output setting key 111e, the washing course setting key 113a, and the drying course setting key 113b. Water temperature setting display LED group 112a consisting of multiple LEDs, washing time setting display LED group 112
b Rinsing number setting display LED group 112c, dehydration power setting display LED group 11
2d, heater output setting display LED group 112e, washing course setting display L
An ED group 114a and a drying course setting display LED group 114B are provided respectively.

The respective keys of the water temperature setting key 111a, the washing time setting key 111b, the rinsing number setting key 111c, the dehydration force setting key 111d, the heater output setting key 111e, the washing course setting key 113a, and the drying course setting key 113b are operated once. Each setting can be changed every time, and the lighting display of each LED group is changed accordingly. In particular, the water temperature setting key 111a,
When the washing time setting key 111b, the number of rinsing times setting key 111c, the dehydrating power setting key 111d, and the heater output setting key 111e are operated a predetermined number of times, the execution of each step can be omitted.

Further, on the right side of the drying course setting display group LED 114b, a favorite course start key 115a which is a key for starting a washing course according to the user's preference, and a key for starting a predetermined standard washing course. A standard course start key 115b, a stop key 115c for stopping the operation of the washing / drying machine, and a lid opening key 115d for opening the upper lid 14 are arranged in line. In front of each of these keys, a preferred course start key receivable display LED 116a, a standard course start key receivable display LED 116b, and a stop key receivable display LED 116c, which light up and display the receivable state of the operation of these keys. Display LED11 with lid open key acceptable
6d are provided respectively.

These favorite course start key 115a, standard course start key 115b, stop key 115c, and lid open key
115d, the key operation is enabled only when the corresponding reception indicator LED is lit.

By operating these keys, the user can drive the vehicle according to his / her preference.
For example, when performing a predetermined standard operation, the standard course start key 115b is operated to start the operation, and when performing other operations, a desired washing course is set by operating the various keys as described above. Then, the operation is started by operating the favorite course start key 115a.

Next, the configuration of the control system of the washing and drying machine according to the present invention will be described. FIG. 6 is a schematic block diagram showing a configuration of a control system of the washing / drying machine.

In the figure, reference numeral 100 denotes a first microcomputer for performing main control of the washing and drying machine, and reference numeral 200 denotes a second microcomputer for mainly performing inverter control of the motor 75. The first microcomputer 100 and the second microcomputer 200 are connected by a communication line, and information communication can be performed between the first microcomputer 100 and the second microcomputer 200 via the communication line.

The first microcomputer 100 includes an input key circuit 101 including various operation keys as described above, the water level detector 25, the drum temperature detector 43, the water temperature detector 28, the abnormal vibration switch 102, and the upper lid. A signal is input from the upper lid switch 103 which opens and closes in conjunction with the opening and closing of 14. The first microcomputer 100 includes a first drive circuit 105 and a second drive circuit 107 which are circuits for driving a plurality of devices, respectively.
Are connected, and a control signal for driving the device is supplied to them based on the signal input as described above. The first microcomputer 100 includes:
The LED display circuit 104 composed of each LED as described above is connected, and the LED display circuit
The information for LED display, such as the setting information of the washing course and the information on the operation status of the washing and drying machine, is given to 104. The first drive circuit 105 is connected to a power-off AC solenoid 106, a drain motor 79, and a blower fan 22, to which respective drive signals are given from the first drive circuit 105. The second drive circuit 107 includes a water supply electromagnetic valve 8, an auxiliary agent input valve 108 for inputting an auxiliary agent such as a softener into the outer tub 2, an upper lid unlocking solenoid 109 for unlocking the upper lid 14, a water heater 27, The drying heaters 4 are connected, and the respective drive signals are supplied from the second drive circuit 107 to these heaters.

The second microcomputer 200 is connected to an inverter drive circuit 110 for driving the motor 75 by an inverter and a reed switch 78. Second microcomputer 20
To 0, a signal related to the rotation of the drum 3 is given from the reed switch 78. Then, the second microcomputer 20
From 0, a control signal for controlling the rotation of the motor 75 is supplied to the inverter drive circuit 110. Further, the inverter drive circuit 110 supplies drive signals for forward / reverse rotation control and rotation speed control to the motor 75 connected thereto based on the control signal given from the second microcomputer 200.

The first microcomputer 100 is supplied with power for its operation from a first power supply circuit 111, and is provided between the first power supply circuit 111 and the first microcomputer 100 separately from the power supply line. Reset circuit 113 for initializing the first microcomputer 100 when the power is turned on
And 50H of the frequency of the power supplied from the first power supply circuit 111
A frequency synchronizing circuit 115 for judging z, 60 Hz and causing the first microcomputer 100 to perform an operation synchronized with the frequency of the judgment result is connected in parallel. Also, the second
The microcomputer 200 is supplied with power for its operation from the second power supply circuit 112, and a power supply is provided between the second power supply circuit 112 and the second microcomputer 200 separately from the power supply line. A reset circuit 114 for initializing the second microcomputer 200 when turned on is connected.

The above-described first drive circuit 105 and the devices driven by it, the second drive circuit 107 and the devices driven by it, the inverter drive circuit 110, the first power supply circuit 111, and the second power supply circuit 112 Power is supplied. A power supply switch 116 is provided on a power supply path from the AC power supply 300.When the power supply switch 116 is turned on, power is supplied to the control system as described above, and the washing and drying machine can operate. It is becoming.

In the washing / drying machine configured as described above, under the control of the first microcomputer 100 and the second microcomputer 200, a washing course consisting of a washing step, a rinsing step, a dehydrating step, and a drying step is normally executed sequentially. On the other hand, each step can be selectively performed. The rinsing step is configured, for example, as a first intermediate dehydrating operation → a first rinsing operation → a second intermediate dehydrating operation → a second rinsing operation, and the intermediate operation performed before the rinsing operation and the rinsing operation. The dehydration operation is repeated a plurality of times. After completion of the dehydration step, a rotation control of the drum 3 is performed as described below, which alternately performs forward rotation and reverse rotation of the drum 3 as pretreatment of the drying step. After the control, the process proceeds to the drying step. It has become.

Such a washing / drying machine is operated by performing the following operation.

After the power is turned on, when the standard course start key 115b is operated (pressed) on the keyboard 111, each LED is turned on.
Then, a display indicating information on the standard washing course (standard setting information such as the set time and the number of operations of each process) is made, and the operation of the standard washing course is started. When the operation other than the standard washing course is performed, first, the water temperature setting key 111a, the washing time setting key 11b, the rinsing number setting key 111c, the dehydration power setting key 111d, the heater output setting key 111e, the washing course setting key 113a By operating the drying course setting key 113b, the process to be executed is selected, and the setting time and the number of operations of the selected process are set. Then, when the favorite course start key 115a is pressed, only the selected steps are sequentially executed.

When the operation is started, in the washing step, first, water is supplied to the outer tub 2 to the set water level, and at the same time, the electric heater 27 is energized, and the washing water reaches the set water temperature set by operating the water temperature setting key 111a. Heat. Next, the motor 75
For example, within a set time with an operation cycle of 9 seconds on-3 seconds off,
Repeat reciprocating rotation. As a result, the drum 3 reciprocates and inside the drum 3, so-called slap-washing is performed in which the clothes are lifted up by the baffles 31a, 31b, 31c and fall. Further, at the same time when the motor 75 is turned off as described above, the DC braking is applied to the motor 75 for, for example, two seconds. As a result, the drum 3 stops suddenly, so that the clothes are beaten against the inner wall of the drum 3 by the reaction and the washing is performed.

In the rinsing operation during the rinsing step, the same control of the motor 75 as in the rinsing step is performed, and the rinsing is performed.

In the intermediate dehydration operation and the dehydration step during the rinsing step, when the water level of the outer tub 2 becomes the reset water level indicating a predetermined low water level at which the drum 3 can be rotated for dehydration, the motor 75 is turned off. The rotation speed is increased and the drum 3
Is rotated in one direction at high speed. Thereby, the clothes in the drum 3 are dehydrated by centrifugal force.

After the completion of the dehydration step, as a pretreatment of the drying step,
The normal rotation and the reverse rotation of the washing tub are alternately performed by a method described later, and the clothes stuck to the inner peripheral wall of the drum 3 are peeled off during the dehydration in the dehydration step. In the drying step, the motor 75 is reciprocated for a set time in an operation cycle of, for example, 15 seconds on and 1 second off.
Is supplied to the drum 3 and hot air is supplied to the inside of the drum 3 by blowing air from the blowing fan 22 and the axial fan.
The clothes inside are dried.

Next, a method of controlling the rotation of the drum 3 after the spin-drying step in the washing and drying machine configured as described above will be described. FIG. 7 is a flowchart showing a procedure for controlling the rotation of the drum 3 after the completion of the spin-drying process.

First, the first microcomputer 100 initializes the time count _Tc to 0 (step 1), and starts counting time (step 2).

Next, it is determined whether or not one second has elapsed (step 3), and only when it is determined that one second has elapsed, 1 is added to the time count _Tc (step 4). Thus, the time count _Tc is such that the count value increases by one every second.

Next, after the start of the timing, it is determined whether or not the time count _Tc is 5 or more (step 5).

If it is determined in step 5 that the time count _Tc is not equal to or greater than 5, the drum 3 is rotated rightward (forward rotation) at 50 rpm (step 6), the process returns to step 3, and the above-described processing is repeated. On the other hand, if it is determined in step 5 that the time count _Tc is 5 or more,
It is determined whether or not _Tc is 10 or more (step 7).

If it is determined in step 7 that the time count _Tc is not 10 or more, the rotation direction of the drum 3 is switched,
The drum 3 is rotated counterclockwise (reverse rotation) at 50 rpm (step 8), the process returns to step 3, and the above-described processing is repeated. On the other hand, if it is determined in step 7 that the time count _Tc is 10 or more, the time count _Tc is set to 0 (step 9), and the process ends.

In this control, after the spin-drying process is completed, the drum 3 is rotated forward and backward for 5 seconds each without a time interval, and is attached to the inner periphery of the drum 3 by the impact force applied to the drum 3 at the time of the forward and reverse rotation. Loosen and remove the garment.

FIG. 8 is a flowchart showing the procedure of another example of the rotation control of the drum 3 after the completion of the spin-drying process.

First, the first microcomputer 100 initializes the time count _Tc to 0 (step 11), and starts counting time (step 12).

Next, it is determined whether or not 0.5 seconds have elapsed (step 1).
3) Only when it is determined that 0.5 second has elapsed, 1 is added to the time count _Tc (step 14). In this way, the time count _Tc is such that the count value increases by one every 0.5 seconds.

Next, after the start of such time counting, it is determined whether or not the time count _Tc is 10 or more (step 15).

If it is determined in step 15 that the time count _Tc is not 10 or more, the drum 3 is rotated clockwise at 50 rpm (step 16), and the process returns to step 13 to repeat the above-described processing. On the other hand, if it is determined in step 15 that the time count _Tc is 10 or more, it is determined whether the time count _Tc is 11 or more (step 17).

If it is determined in step 17 that the time count _Tc is not 11 or more, the drum 3 is stopped (step 17).
18), returning to step 13, and repeating the above processing. On the other hand, if it is determined in step 17 that the time count _Tc is equal to or greater than 11, it is determined whether the time count _Tc is equal to or greater than 21 (step 19).

If it is determined in step 19 that the time count _Tc is equal to or greater than 21, the drum 3 is rotated counterclockwise at 50 rpm (step 20), the process returns to step 13, and the above processing is repeated. On the other hand, if it is determined in step 19 that the time count _Tc is equal to or greater than 21, it is determined whether the time count _Tc is equal to or greater than 22 (step 21).

If it is determined in step 22 that the time count _Tc is not equal to or greater than 22, the drum 3 is stopped (step 22).
22), returning to step 13, and repeating the above-described processing. On the other hand, if it is determined in step 21 that the time count _Tc is not equal to or greater than 22, the time count _Tc is set to 0 (step 23), and the process ends.

In this control, after the spin-drying step, the drum 3 is rotated forward and backward for 5 seconds each, and the time interval is 0.5 seconds. Loosen the clothing stuck to and peel off.

That is, in such control, the drum 3 is rotated forward and backward at no time interval or at an extremely short time interval of, for example, 0.5 second, so that an impact force is applied to the clothing stuck to the inner peripheral wall of the drum 3 to thereby perform the impact. Loosen and peel off.

After the above-described control is performed, the drying is performed while the drum 3 is reciprocated at the predetermined operation cycle as described above in the drying step, and the clothes are dried.

In the present embodiment, after the spin-drying step is completed, the forward rotation and the reverse rotation of the drum 3 are respectively performed once as the pre-processing of the drying step. However, the present invention is not limited to this.
It may be performed several times.

〔effect〕

As described in detail above, in the washing / drying machine according to the present invention, when the forward and reverse rotations of the washing tub are alternately performed after the spin-drying step, the washing tub is given to the washing tub when the rotation direction of the washing tub is switched. Due to the impact force, the laundry stuck to the inner wall of the washing tub is loosened and peeled off from the inner wall, and then, in the subsequent drying process, the laundry in the washing tub is dried because the loosened laundry is dried. The present invention has excellent effects, such as being able to suppress wrinkles of clothing.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a washing and drying machine according to the present invention, and FIG.
FIG. 3 is a longitudinal sectional view of the outside of the outer tank, when viewed from the front. FIG. 3 is a longitudinal sectional view of the inside of the drum, as viewed from the front. FIG. FIG. 6 is a plan view of a keyboard of the operation unit, FIG. 6 is a schematic block diagram showing a configuration of a control system of the washing / drying machine, FIG. 7 is a flowchart showing a procedure for controlling rotation of the drum after the spin-drying process, FIG. 9 is a flowchart showing another example of the rotation control of the drum after the completion of the spin-drying process. 2 ... Outer tank, 3 ... Drum, 100 ... First microcomputer, 200 ... Second microcomputer

Claims (1)

(57) [Claims] 1. A washing and drying machine comprising an outer tub and a washing tub rotating inside thereof, wherein a washing step, a rinsing step, a dehydrating step and a drying step are sequentially executed in the washing tub. In the washing machine, after the dehydration step, the washing tub is alternately rotated forward and backward so as to peel off the laundry from the inner wall of the washing tub, and thereafter, the drying step is performed. Dryer.