JP2003024685A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce creases and entangling of laundry, to eliminate non- uniformity in drying and to enable efficient drying at all the time even when laundry stagnating water is put in or laundry is added in the middle of water supply in washing in a washing and drying machine, with which processing from washing to drying can be consistently performed. SOLUTION: This machine is operated under at least two processes of different time ratios of a tub spinning mode for performing drying while spinning an inner tub and a rotary blade rotating mode for performing drying while rotating a rotary blade and, correspondingly to the exact quantity of laundry 36 according to the result of a detection means 37b showing the presence of water equal to the quantity of laundry, the time ratio is changed to a proper time and a proper mode. Thus, the laundry can be uniformly and efficiently dried at all the time without being entangled.

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention has a process of drying laundry by blowing warm air into an inner tub having a rotation axis substantially in a vertical direction, The present invention relates to a washing / drying machine capable of performing washing to drying consistently. 2. Description of the Related Art Conventionally, a washing and drying machine of this kind is provided with a rotating center in an outer tub elastically suspended in a housing as disclosed in, for example, Japanese Patent Application Laid-Open No. 11-276661. The inner tub that has a shaft in the vertical direction is rotatably supported, and the rotor is rotatably provided on the inner bottom of the inner tub. During the washing and rinsing steps, the rotor is rotated to wash laundry in the inner tub. In the dehydration process, rinse and spin the inner tank at high speed to dehydrate,
In the drying step following the dehydration step, the air heated by the heating device is blown into the inner tank by a blower to be dried. The operation of the above configuration will be briefly described.
When the operation from the washing to the drying is performed consistently, when the operation is started in the washing process, the laundry amount is determined based on the detection result of the laundry amount no water detecting means before water supply, and the washing water level is determined according to the laundry amount. Then, the washing water flow, the drying time, the drying process, and the like are determined, and the washing, rinsing, dehydrating, and drying processes are sequentially performed. [0004] In the drying process, the rotor is rotated left and right alternately.
Alternatively, the laundry is dried by supplying warm air heated by a heating device into the inner tub while rotating the inner tub. At this time, the drying time and the ratio of the rotation of the inner tub to the rotation of the rotor are determined in accordance with the laundry amount determined by the laundry amount waterless detection means, and an appropriate drying process is performed. For example, in the first half of the drying process, a mode in which the inner tub rotation is mainly performed, and in the second half, a mode in which the rotary wing rotation is mainly performed. On the other hand, when the laundry amount is small, the time is set short in both of the modes. Thereafter, the degree of drying is determined, and if it is dry, the drying is completed and the operation proceeds to blowing. [0005] However, in such a conventional configuration, when the process from washing to drying is performed consistently, when the already-laundred laundry is thrown in or when the inner tub is filled with water. If the laundry is inserted in a state where is contained, or if the laundry is added during the water supply, an error occurs between the laundry amount determined by the laundry amount no water detecting means and the actual laundry amount, The appropriate drying process cannot be performed according to the actual amount of laundry. For example, when the laundry that has already contained water is thrown in, since the laundry contains water, it is determined that the laundry amount determined by the laundry amount water absence detecting means is larger than the actual laundry amount,
The drying time was set long. In that case, if the mode in which the inner tub rotation in the first half is long is long even though the amount of laundry is small, the laundry will be dried in a fixed state, causing wrinkles. If the rotation-based mode was long, the laundry was damaged. Also, when laundry is added during the water supply, the actual laundry amount is larger than the laundry amount determined by the laundry amount no water detecting means, so that the drying time is set shorter than the drying time corresponding to the actual laundry amount. Was. For this reason, predetermined drying cannot be performed in the mode in which the inner tub rotation in the first half is the main mode, and the latter half of the rotating blade rotation shifts to the main mode in a state in which the laundry is wetter than the predetermined dry state. In the mode where the rotor blade rotation was the main mode, the laundry was easily entangled.
In addition, sufficient drying could not be performed, or uneven drying occurred. SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. In the case where washing to drying is performed consistently, washing with water that has already been introduced or washing with water in the inner tub is performed. Even when items are added or when laundry is added during the water supply, accurate determination of the amount of laundry is performed, and an appropriate drying process is performed according to the actual amount of laundry. It is an object of the present invention to reduce the amount of tangling of laundry, reduce drying unevenness, and enable efficient drying. [0007] In order to solve the above-mentioned problems, a washing and drying machine of the present invention comprises a tub rotation mode for drying while rotating an inner tub and a rotating blade for drying while rotating a rotating blade. In a process that has two or more processes with different time ratios in the rotation mode and executes a process in which the time ratio in the rotary blade rotation mode increases as drying proceeds, each process is performed based on the detection result of the washing water presence detection unit. And at least one of the execution time and the time ratio of each mode is changed. [0008] Thus, when the washing to drying are performed consistently, when the laundry that has already been wetted is put in, when the laundry is put in a state where the inner tub is filled with water, or when the water is supplied, In any use state, such as when laundry is added, the actual amount of laundry can be accurately determined, so that a drying process with an appropriate time distribution according to the amount of laundry can be performed. DETAILED DESCRIPTION OF THE INVENTION The invention according to a first aspect of the present invention is directed to an outer tank elastically suspended in a housing, and has a rotation center axis in a substantially vertical direction, and is rotatable in the outer tank. The supported inner tank, a rotating blade rotatably provided on the inner bottom of the inner tank, a driving unit for driving the inner tank or the rotating blade, a blowing unit for blowing circulating air into the inner tank, Heating means for heating the air blown by the blowing means, control means for controlling the operations of the driving means, blowing means, heating means and the like to control the drying process, and detecting the temperature of the circulating air in the circulation path Temperature detecting means for detecting the amount of laundry in a state where water is contained in the inner tub, and laundry amount water presence detecting means for detecting an amount of laundry in the inner tub, wherein the control means dries while rotating the inner tub. Tank rotation mode and rotor rotation mode in which the rotor is dried while rotating the rotor. In the apparatus having two or more processes having different time ratios and performing a process in which the time ratio of the rotary blade rotation mode increases as drying progresses, each of the processes is performed based on a detection result of the washing amount presence detector. It is designed to change at least one of the execution time and the time ratio of each mode, and when performing from washing to drying consistently,
Even when laundry that has already contained water is thrown in, when laundry is put in with the inner tub filled with water, or when laundry is added during the water supply, an accurate determination of the amount of laundry is performed and actual Perform an appropriate drying process according to the amount of laundry,
It is possible to always reduce wrinkles and damages of the laundry, reduce the entanglement of the laundry, and dry efficiently without drying unevenness. Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) As shown in FIG.
Has a structure in which an outer tub 3 is elastically suspended by a plurality of suspensions 2 therein, and vibrations during operation are absorbed by the suspensions 2. Inside the outer tub 3, an inner tub 4 having a rotation center axis in a substantially vertical direction and accommodating laundry is rotatably supported, and a rotating wing 5 for stirring the laundry on the inner bottom of the inner tub 4 is rotated. It is provided freely. The rotary blade 5 is formed in a pot shape having an outer peripheral surface with an inclined surface shape. A number of small holes (not shown) are provided on the inner peripheral wall of the inner tank 4, and a fluid balancer 6 is provided above the small holes. And near the bottom center of the outer tank 3 and the inner tank 4,
A washing / dewatering shaft 7 having a hollow biaxial structure and a clutch 8 for switching transmission of rotational force to the washing / dewatering shaft 7 during washing or dehydration are provided. Motor (drive means) 9
Is provided in the outer tub 3 so as to drive the inner tub 4 or the rotary blade 5 via the clutch 8. A passage is formed from a lower portion of the outer tank 3 to a circulation duct 11 through a telescopic lower bellows-shaped hose 10.
The outlet of the circulation duct 11 is provided with a drying blower (blowing means) 12.
It is connected to the entrance. The outlet of the drying blower 12 is connected to a passage 11a, a heater 13 serving as a heating means is provided in the passage 11a, and an extendable upper bellows hose 14 is connected to the passage 11a. The upper bellows-shaped hose 14 is open toward the inner tank 4, and the inner tank 4 communicates with the outer tank 3 through a small hole in the inner peripheral wall. Therefore, these passages constitute a circulation path. The temperature detecting means 15 detects the temperature of the circulating air, and is connected to the outlet of the drying blower 12 and the heater 1.
3 is provided. An openable and closable inner lid 16 is provided at the upper part of the inner tank 4, and a hot air blowout hole 17 connected to an extendable upper and lower bellows-shaped hose 14 is opened near the inner lid 16. The cooling blower 18 is attached to a side surface of the housing 1 so that outside air can be introduced into the housing 1. Drain valve 1
Reference numeral 9 denotes a device for draining water in the outer tank 3, and a switching valve 20 switches the circulation path. The water supply valve 21 supplies water into the inner tank 4, and the water level detecting means 22 detects the water level in the outer tank 3. The control device 23 controls a washing process including washing, rinsing, and dehydrating processes and a drying process following the washing process based on the settings set by the operation display unit 24. It is configured as shown in FIG. The control means 25 is constituted by a microcomputer or the like, receives the outputs of the water level detecting means 22 and the temperature detecting means 15, and receives the output of the clutch 8 via a load driving means 26 constituted by a bidirectional thyristor, a relay and the like. , A drying blower 12, a heater 13, a cooling blower 18, a drain valve 19,
The operations of the switching valve 20, the water supply valve 21 and the like are controlled to control the washing and drying processes. 27 is a commercial power supply. The rotation control means 28 is a part of the control means 25 and is constituted by a microcomputer or the like. The rotation control means 28 controls the inverter circuit 31 via the drive circuit 30 based on the information from the position detection means 29 to thereby control the motor 9. Is controlled to rotate. The motor 9 is a DC brushless motor, not shown, and comprises a stator having three-phase windings and a rotor having a two-pole permanent magnet disposed on a ring. The first winding 9a, the second winding 9b, and the third winding 9c constituting the winding are wound around a core provided with slots. The inverter circuit 31 is constituted by a switching element comprising a parallel circuit of a power transistor (IGBT) and a reverse conducting diode. A series circuit of a first switching element 31a and a second switching element 31b, a series circuit of a third switching element 31c and a fourth switching element 31d, and a fifth switching element 3
It comprises a series circuit of 1e and a sixth switching element 31f, and the series circuit of each switching element is connected in parallel. Here, both ends of the series circuit of the switching elements are input terminals to which a DC power supply is connected, and output terminals are respectively connected to connection points of two switching elements forming the series circuit of the switching elements. The output terminal is 3
The U terminal, the V terminal, and the W terminal are connected to the positive terminal, the zero terminal, and the zero terminal, respectively, by connecting to the U terminal, the V terminal, and the W terminal of the phase winding and turning on and off the two switching elements that form a series circuit of the switching elements. The three states of voltage and release are set. The switching elements are turned on and off by three position detecting means 29a, 29b and 29 each composed of a Hall IC.
It is controlled by the rotation control means 29 based on the information from c. The position detecting means 29a, 29b, 29c are arranged on the stator at intervals of 120 electrical degrees so as to face the permanent magnets of the rotor. As shown in FIG. 3, during one rotation of the rotor, the three position detecting means 29a, 29b and 29c output pulses at timings as shown in FIG. The rotation control means 28 detects the timing of the arrow shown in the figure (when the state of any one of the three position detection means changes), and detects the position detection means 29a, 29b, 2
By changing the on / off state of the switching elements 31a to 31f based on the signal of 9c, the U terminal, the V terminal,
The W terminal is set to three states of positive voltage, zero voltage, and release, and the first winding 9a, the second winding 9b, and the third winding 9c of the stator are energized to generate a magnetic field and rotate the rotor. It is. The switching elements 31a, 31c,
31e is controlled by pulse width modulation (PWM), for example, by controlling the energizing ratio of high and low at a repetition frequency of 10 kHz, thereby controlling the number of rotations of the rotor. Position detecting means 29
a, 29b, and 29c, the cycle is detected each time the state of the signal changes, and the number of rotations of the rotor is calculated based on the cycle.
PWM control is performed on 1a, 31c and 31e. The resistor 32 detects current, and the resistor 3
2, the input current value of the inverter circuit 31 is detected. The commercial power supply 27 is connected to the inverter circuit 31 via a DC power supply conversion device including a diode bridge 33, a choke coil 34, and a smoothing capacitor 35. However, this is only an example, and the configuration of the DC brushless motor 9, the configuration of the inverter circuit 31, and the like are not limited thereto. The operation of the above configuration will be described. First,
The washing process will be described with reference to FIGS. When the laundry 36, detergent and the like are put into the inner tub 4 and the operation is started, the control means 25 performs two reciprocal reversals of the rotating blade 5 in a time period of, for example, one second on and two seconds off. At this time, the laundry amount water absence detecting means 37a is provided by the position detecting means 2
9 to determine the amount of the laundry 36 in the inner tub 4 by detecting the amount of inertial rotation of the rotor when the motor 9 is turned off by inputting a signal from the motor 9. The control means 25
Based on the amount of laundry detected by the laundry amount no water detecting means 37a, a predetermined washing water level in the washing process, a washing time limit, a time distribution in the drying process, and the like are determined. Thereafter, the water supply valve 21 is driven by the control means 25, and water is supplied until the water level detected by the water level detection means 22 reaches the predetermined washing water level, and the control means 25 turns on the rotor 5 again for one second, for example, for 2 seconds. Two reversals are performed in the horizontal direction with the time limit of seconds off. At this time, the laundry amount water presence detecting means 37b is
9 to determine the amount of the laundry 36 in the inner tub 4 by detecting the amount of inertial rotation of the rotor when the motor 9 is turned off by inputting a signal from the motor 9. The control means 25
Based on the amount of laundry detected by the laundry-amount-of-water detection unit 37b, the laundry time limit determined by the amount of laundry detected by the laundry-amount-of-water detection unit 37a, the time distribution in the drying process, and the like are changed. The details of the change of the time distribution of the drying process will be described later. Next, the motor 9 is driven to rotate the inner tub 4. At this time, the drain valve 19 and the switching valve 20 are closed. Thereby, the outer peripheral portion of the water in the inner tank 4 rises due to the centrifugal force. Along with this, the water between the inner tank 4 and the outer tank 3 rises along the inner wall of the outer tank 3 and is then sprinkled from the upper part of the inner tank 4 into the inner tank 4 and circulated. Thereby, the water containing the detergent passes through the laundry 36 in the inner tub 4 and is washed. Thereafter, the drain valve 19 is opened to drain the water, water is supplied again, and the laundry is rinsed in the same manner as in the washing process. In the dehydration process, the inner tub 4 containing the laundry 36 is rotated at a high speed. Due to the centrifugal force generated as a result, the laundry 36 is pressed against the inner wall of the inner tub 4, and moisture is separated from the laundry 36 and dehydrated by the centrifugal force. In the drying step, with the switching valve 20 opened, the hot air that has dried into the inner tank 4 through the upper bellows-shaped hose 14 and the hot air blowing hole 17 is generated by the blowing of the drying blower 12 and the heat generated by the heater 13. Sent in. At this time, the laundry 36 is rotating together with the inner tub 4 due to the rotation of the inner tub 4, being flipped up or down by the left and right rotation of the rotary wing 5, and then being dropped. The warm air sent into the tub 4 deprives the laundry 36 of moisture when passing through the gap between the movements of the laundry 36, and after leaving the inner tub 4 inside the outer tub 3 in a wet state, After passing through the lower bellows-shaped hose 10, it passes through the switching valve 20 and reaches the circulation duct 11. This flow is shown in FIG.
Indicated by arrows. When warm air containing moisture passes through the inner wall of the outer tub 3 and the inside of the circulation duct 11, the outside air is introduced by the cooling blower 18, and the outer wall of the outer tub 3 and the circulation duct 11 are cooled. As a result, the moisture of the humid air is condensed on the inner wall thereof, and the humid warm air is dehumidified.
Return to. The moisture condensed on the inner wall of the outer tank 3 is transferred to the switching valve 20.
And is appropriately discharged from the drain port 38 together with the moisture condensed on the inner wall of the circulation duct 11. Then, after the drying process is completed, a blowing process for driving the drying blower 12 and the cooling blower 18 is performed, and then the process ends. Here, an air-cooled dehumidification method using cooling air is used as a means for cooling wet hot air, but a water-cooled dehumidification method may be used. The circulating air temperature detected by the temperature detecting means 15 during the drying process changes as shown in FIG. That is,
When the drying process starts, the drying blower 12 and the heater 13 are operated, and hot air is circulated through the circulation path. The warm air blown out from the warm air outlet 17 to the inner tub 4 is sprayed on the wet laundry to perform efficient drying. Furthermore, when the hot air that has taken moisture from the laundry and becomes humid passes through the circulation duct 11, heat is exchanged through the wall surface of the circulation duct 11 by the air blown by the cooling blower 18. At this time, the warm air cooled to the dew point forms dew on the inner wall surface of the circulation duct 11. Preheat drying period is laundry 36
Is not heated enough and the amount of evaporated water is small,
The circulating air temperature detected by the temperature detecting means 15 increases. In the constant-rate drying period, the amount of water evaporated from the laundry 36 and the amount of water cooled and condensed by the cooling air in the circulation duct 11 are constant (equilibrium state), and the temperature of the circulation air is maintained in an equilibrium state. Become. Further drying proceeds, and a reduced-rate drying period begins, so that the amount of evaporated water from the laundry 36 gradually decreases, so that the temperature of the circulating air rises again. If the temperature rises by Δθ1 from the temperature θa detected by the temperature detection means 15 during the constant-rate drying period, the drying is completed. Next, a control method of the motor 9 by the control means 25 and the rotation control means 28 in the drying process will be described with reference to FIG. FIG. 5 is a flowchart showing the flow of each step in the washing to drying process according to the present invention. When the washing process is completed and the drying process is started, first in step 101, the laundry is dehydrated by the last dehydration of the washing process. Since 36 is stuck in the inner tub 4, it is peeled off and loosened sufficiently to carry out a fabric peeling stroke in order to increase the contact area of the laundry 36 with the air. Specifically, left and right reversal is performed five times in a time limit of turning on the rotary blade 5 for 1 second and off for 2 seconds. By doing so, the laundry 36 stuck in the inner tub 4 at the time of dehydration is peeled off from the inner tub 4, and the cloth of the laundry 36 increases, and the contact area with the air increases, and the subsequent drying To make progress faster. At this time, since the drying process is performed, dry hot air is sent into the inner tank 4 through the upper bellows-shaped hose 14 and the hot air jet hole 17 due to the blowing of the drying blower 12 and the heat generated by the heater 13. 18 is also driven. Here, in step 100, based on the detection result by the water-abundance detecting means 37a before the water supply, the table 1
According to the time table as shown in (1), the predetermined execution is performed according to the execution time of each drying step and the time ratio between the tank rotation mode for drying while rotating the inner tank 4 and the rotary blade rotation mode for drying while rotating the rotary blade 5. Determine the time and time ratio of each mode. Thereafter, when water is supplied and the water level reaches a predetermined level, in step 101, the amount of laundry is detected again by the laundry amount detection means 37b, and based on the detection result, the execution time of each drying process and the rotation of the inner tub 4 are performed. One or both of the time ratios of the tank rotation mode for drying and the rotation blade rotation mode for drying while rotating the rotor 5 are changed and redetermined. After the washing step is completed, the drying step from step 103 to step 105 is executed based on the result of the change and determination after the execution of the cloth removing step in step 102.
After that, in step 106, a blowing process for driving the drying blower 12 and the cooling blower 18 is performed, and then, in step 107, the drying is terminated. Here, the time table in Table 1 is set so that the time ratio of the rotation of the rotary blades increases with the progress of the drying process (from step 103 to step 105). [Table 1] According to the experiments conducted by the inventors, in the case of this type of washing and drying machine, while the drying rate is low, the drying proceeds sufficiently while rotating the inner tub 4 or even while the inner tub 4 is stationary. It has been found that as the drying rate increases, the rotation time of the rotor 5 is increased and the laundry 36 is not replaced up, down, left and right, and it takes a long drying time or uneven drying occurs. Although a method in which the rotation of the rotor is mainly performed from the initial stage of drying may be considered, when the drying rate of the laundry in the initial stage of drying is low, the entanglement of the laundry 36 becomes severe, which causes uneven drying and wrinkles. It turned out to be. On the other hand, it was found that when the drying rate of the laundry 36 exceeds 90%, the entanglement and wrinkles of the laundry 36 do not easily progress even when the rotating blades are mainly rotated. Therefore, by performing the three drying steps as described above, it is possible to reduce the occurrence of wrinkles caused by cloth entanglement, and to replace the laundry 36 up, down, left, and right, so that the warm air is evenly distributed over the laundry. Can be dried efficiently without drying unevenness. However, if the amount of laundry cannot be accurately detected, the process shifts to a drying process mainly by rotating blades before a sufficient drying rate is reached, and uneven drying and wrinkles due to cloth entanglement occur. Can occur. Conversely, even though the drying rate has reached a sufficient level, the drying process mainly by the rotation of the tank continues forever, and there is a possibility that the drying time will be long or wrinkles will occur. Therefore, as described above, by changing the time to a proper time and a proper mode in accordance with the accurate amount of the laundry 36 based on the result of the laundry amount water presence detecting means 37b, the laundry already hydrated can be washed. Even if you put the laundry, put the laundry with water in the inner tub, or if the laundry is added in the middle of water supply, you can always dry efficiently without getting entangled it can. In the present embodiment, the drying operation is controlled in three drying steps having different time ratios between the tank rotation mode and the rotary blade rotation mode. However, the drying operation is not limited to the three steps.
Further effects can be obtained if the control is finely divided into more steps. The time of each step and the ratio of each drying mode in each step are examples of the present invention.
It is not limited to these numerical values. Although a direct current brushless motor is used as the driving means and is controlled by an inverter, it may be an induction motor. Further, as means for detecting the amount of laundry when the inner tub 4 is filled with water, the inertial rotation of the motor 9 when the rotor 5 is rotated is detected. The same effect can be obtained even if the method of detecting the current of the motor 9 during the operation is performed. According to the first aspect of the present invention, the outer tub elastically suspended in the housing and the rotation center axis is provided in a substantially vertical direction, and the outer tub is provided in the outer tub. An inner tank rotatably supported, a rotating blade rotatably provided at an inner bottom of the inner tank, a driving unit for driving the inner tank or the rotating blade, and a blowing unit for blowing circulating air into the inner tank Heating means for heating the air blown by the blowing means, control means for controlling the operation of the driving means, the blowing means, the heating means and the like to control the drying process; Temperature detecting means for detecting the temperature, and laundry amount water presence detecting means for detecting the amount of laundry in a state where water is contained in the inner tub, the control means rotates the inner tub Vessel rotation mode for drying while rotating and rotor rotation for drying while rotating the rotor In the apparatus which has two or more steps having different time ratios of the mode and executes a step in which the time ratio of the rotary blade rotation mode increases with the progress of drying, based on the detection result of the washing amount presence detecting means, Since at least one of the execution time of each step and the time ratio of each mode is changed, when washing to drying is performed consistently, when the already wet laundry is thrown in or when the inner tank is Even if you put laundry in a condition where water is contained, or if you add laundry while water is being supplied, it will accurately determine the amount of laundry and perform an appropriate drying process according to the actual amount of laundry. It is possible to reduce wrinkles and damages of articles, reduce entanglement of laundry, and dry efficiently without drying unevenness.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a washing and drying machine according to a first embodiment of the present invention. FIG. 2 is a block diagram of a main part of the washing and drying machine. FIG. FIG. 4 is a timing chart showing a method of driving a motor. FIG. 4 is a diagram showing a change in circulating air temperature in a drying process of the washing and drying machine. FIG. 5 is a flowchart of a main part showing a drying process of the washing and drying machine. Case 3 Outer tub 4 Inner tub 5 Rotating blade 9 Motor (driving means) 12 Drying blower (blowing means) 13 Heater (heating means) 15 Temperature detecting means 25 Control means 37b Washing amount water detecting means

   ────────────────────────────────────────────────── ─── Continuation of front page    F-term (reference) 3B155 AA16 BA09 BB19 CB07 CB49                       CB52 CB55 HB02 HB03 KA02                       KA19 KA27 LB11 LC07 LC15                       LC28 MA01 MA06 MA07 MA08

Claims (1)

Claims: 1. An outer tank elastically suspended within a housing, an inner tank having a rotation center axis in a substantially vertical direction, and rotatably supported in the outer tank. A rotating blade rotatably provided on the inner bottom of the tank, a driving unit for driving the inner tank or the rotating blade, a blowing unit for blowing circulating air into the inner tank, and an air blown by the blowing unit. Heating means for heating, control means for controlling the drying process by controlling the operation of the driving means, the blowing means, and the heating means, and a temperature detection means for detecting the temperature of the circulating air in the circulation path, Washing amount detection means for detecting an amount of laundry in a state where water is contained in the inner tub; andthe control means includes a tub rotation mode for drying while rotating the inner tub and the rotating blades. Two processes with different time ratios of the rotating blade rotation mode for drying while rotating The method having the above-described configuration and performing a process in which the time ratio of the rotary blade rotation mode increases with the progress of drying, wherein the execution time of each process and the time of each mode are based on the detection result of the laundry amount water presence detection unit. A washer / dryer adapted to change at least one of the ratios.