JP2011229689A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine which prevents time extension due to a failure of start of a dewatering process and reduces vibration and noise generated during a dewatering operation.SOLUTION: A washing machine S comprising a housing 1, an outer tank 10 disposed inside the housing 1 and elastically supported by an elastic support 13, a washing/dewatering tank 8 which is disposed inside the outer tank 10 and rotatable, a driving means 9 for driving the washing/dewatering tank 8 to rotate, a vibration detection means 63 capable of detecting the vibration of the outer tank 10, and a control means 7 for controlling the driving means 9 based on an output signal from the vibration detection means 63. The control means 7 comprises a clothing determination means 75 to determine whether clothing in the washing/dewatering tank 8 is difficult to dewater or not. A process of removing moisture of the clothing is performed in an early stage of the dewatering operation if the clothing determination means 75 finds that the clothing is difficult to dewater.

Description

  The present invention relates to a washing machine, and more particularly to a washing machine that changes a dehydration process according to clothing.

Inside the washing machine, an elastically supported outer tub and a washing / dehydrating tub for washing, rinsing and dehydrating clothes (laundry) are rotatably arranged inside the outer tub. In addition, a driving means is provided on the bottom surface of the outer tub so that the washing and dewatering tub can be driven to rotate.
The dehydration process is a process in which the washing / dehydration tub is rotated at a high speed to remove the water remaining in the clothes by centrifugal force. Easy and the amount of misalignment (unbalance) increases, so the washing machine shakes greatly during dehydration (when the rotational speed of the washing and dehydrating tub is close to the resonance frequency of the elastically supported outer tub) It can be difficult.

  In Patent Document 1, a torque detection means for detecting the torque of a motor (driving means) and a weight detection means for detecting the weight of clothing stored in a drum (washing and dewatering tub) are provided, and based on the detection result. A drum type washing machine that discriminates the quality of clothing and controls operation is disclosed.

JP 2008-6179 A

However, the drum-type washing machine disclosed in Patent Document 1 has a problem that it cannot be distinguished from “a small amount of clothing” and “a small amount of clothing but difficult to dehydrate”. However, clothes that are difficult to dehydrate have had the problem that dehydration activation fails and the dehydration time is extended.
In addition, if the dehydration activation fails, it is because the vibration during dehydration is large, so there is also the problem of generating unpleasant noise and vibration due to abnormal vibration of the casing of the washing machine and the outer tub for the user. Had.

  It is an object of the present invention to provide a washing machine that prevents extension of time due to failure of dehydration activation and that reduces vibration and noise generated during dehydration operation.

  In order to solve such a problem, the present invention provides a washing machine according to claim 1, a housing, an outer tub disposed inside the housing and elastically supported by an elastic support, and the outer A rotatable washing / dehydrating tub disposed inside the tub, a driving means for rotationally driving the washing / dehydrating tub, a vibration detecting means for detecting a vibration state of the outer tub, and an output from the vibration detecting means And a control unit that controls the driving unit based on the signal, wherein the control unit determines from the output signal of the vibration detection unit whether the clothing in the washing and dewatering tub is difficult to dehydrate. A garment discriminating means that performs the process of removing moisture from the garment in the initial stage of the dehydration operation when the garment discriminating means discriminates that the garment is difficult to dehydrate.

  ADVANTAGE OF THE INVENTION According to this invention, the washing machine which prevents the extension of time by spin-drying | dehydration start failure, and reduces the vibration and noise which generate | occur | produce at the time of spin-drying | dehydration operation can be provided.

It is an external appearance perspective view of the washing machine (drum type washing dryer) concerning a 1st embodiment. It is the left view which cut and showed a part of housing | casing and the outer tub in order to show the internal structure of the washing machine (drum type washing dryer) concerning 1st Embodiment. It is the right view which cut and showed a part of housing | casing and the outer tub in order to show the internal structure of the washing machine (drum type washing-drying machine) which concerns on 1st Embodiment. It is a figure which shows the structure of the control apparatus of the drum type washing-drying machine which concerns on 1st Embodiment. It is the schematic diagram seen from the opening part side of the drum in the direction of a rotating shaft explaining the deviation of the clothing produced in the drum and the vibration of the outer tub. It is a flowchart which shows the operation control of the washing machine (drum type washing-drying machine) which concerns on 1st Embodiment. It is the graph which showed the acceleration of the outer tub generated during the washing operation of the washing machine (drum type washing dryer) concerning a 1st embodiment. It is a flowchart which shows thick clothing discrimination | determination of the washing machine (drum type washing-drying machine) which concerns on 1st Embodiment. It is a flowchart which shows the operation | movement of the dehydration process initial stage at the time of the thick clothing of the washing machine (drum type washing dryer) which concerns on 1st Embodiment. It is process drawing of the washing-drying driving | operation of the washing machine (drum type washing dryer) concerning 1st Embodiment. It is side surface sectional drawing of the washing machine (vertical type washing-drying machine) which concerns on 2nd Embodiment. It is the schematic diagram seen from the opening part side of the washing and dewatering tub in the direction of the rotation axis for explaining the relationship between the deviation of the clothes generated in the washing and dewatering tub and the vibration of the outer tub. It is the graph which showed the acceleration of the outer tub which generate | occur | produces during the washing operation of the washing machine (vertical type washing dryer) concerning a 2nd embodiment. It is a flowchart which shows the thick clothing discrimination | determination of the washing machine (vertical washer / dryer) which concerns on 2nd Embodiment. It is a flowchart which shows operation | movement of the dehydration process initial stage at the time of the thick clothing of the washing machine (vertical type washing dryer) which concerns on 2nd Embodiment.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate.

<< First Embodiment >>
FIG. 1 is an external perspective view of the washing machine (drum type washing and drying machine) according to the first embodiment.
<Drum-type washing dryer S1>
First, the drum-type washing / drying machine S1 will be described.
The casing 1 constituting the outer casing of the drum type washing and drying machine S1 is mounted on a base 1h, and includes left and right side plates 1a and 1b, a front cover 1c, a back cover 1d (see FIG. 2), and an upper surface. A cover 1e and a lower front cover 1f are provided. The left and right side plates 1a and 1b are joined by a U-shaped upper reinforcing material (not shown), a front reinforcing material (not shown), and a rear reinforcing material (not shown), and include the base 1h. A box-shaped housing 1 is formed and has sufficient strength as a casing of the drum type washing and drying machine S1.

  The door 2 is for closing a slot for putting in and taking out clothes provided in the approximate center of the front cover 1c, and can be opened and closed by a hinge (not shown) provided in a front reinforcing material (not shown). It is supported. When the door release button 2a is pressed, the lock mechanism (not shown) is released and the door 2 is opened. When the door 2 is pressed against the front cover 1c, the door is locked and closed. The front reinforcing material (not shown) has a circular opening for putting clothes in and out concentrically with an opening 10b (see FIG. 2) of the outer tub 10 described later.

  The operation / display panel 3 provided at the upper center of the housing 1 includes a power switch 4, an operation switch 5, and a display 6. The operation / display panel 3 is electrically connected to a control device 7 (see FIG. 2) provided at the lower part of the housing 1.

  The detergent container is provided on the upper left side in the housing 1 and a drawer-type detergent tray 15 is mounted from the front opening. The detergent container is fixed to the upper reinforcing material of the housing 1.

  Behind the detergent container, water-related parts such as a water supply valve 16a (see FIG. 4), a bath water supply pump (not shown), a water level sensor (not shown) are provided. The detergent container is connected to the outer tub 10 (see FIG. 2). The water supply valve 16a is a multiple valve, and supplies water to the drying duct 18 provided with a detergent container and a water cooling / dehumidifying mechanism (not shown). The top cover 1e is provided with a water supply hose connection port 16 from a water tap and a water absorption hose connection port 17 for remaining hot water in the bath.

FIG. 2 is a left side view of the washing machine (drum type washing and drying machine) according to the first embodiment with a part of the housing and the outer tub cut away to show the internal structure.
The drum 8 serving as a washing and dewatering tub is rotatably supported by the outer tub 10, and has a large number of through holes for water flow and ventilation on its outer peripheral wall and bottom wall, and clothes are taken in and out on the front end face. An opening 8a is provided for this purpose. A fluid balancer 8c integrated with the drum 8 is provided outside the opening 8a. A plurality of lifters 8b extending in the axial direction are provided on the inner side of the outer peripheral wall. When the drum 8 is rotated during washing and drying, the clothes are lifted along the outer peripheral wall by the lifter 8b and centrifugal force, and fall by gravity. A tumbling operation that repeats various movements is performed. The rotation center axis of the drum 8 is inclined so that the horizontal or opening 8a side becomes higher.

  The cylindrical outer tub 10 includes the drum 8 coaxially, the front surface is opened, and a motor 9 is provided at the center of the rear end surface. A rotation shaft 9 a of the motor 9 passes through the outer tub 10 and is coupled to the drum 8. In addition, the motor 9 includes a rotation detection device 61 configured by a Hall element or a photo interrupter that detects the rotation, and a motor current detection device 62 that detects a current flowing through the motor 9.

An outer tub cover 10 a is provided at the opening on the front surface of the outer tub 10 to enable water storage in the outer tub 10. In the center of the front side of the outer tub cover 10a, there is an opening 10b for putting clothes in and out. The opening 10b and the opening provided in the front reinforcing material (not shown) are connected by a rubber bellows 11, and the outer tub 10 is sealed with water by closing the door 2.
A drain outlet 10 d is provided at the bottom bottom of the outer tub 10 and is connected to the drain hose 12. A drainage valve 12a is provided between the drainage port 10d and the drainage hose 12, and the drainage valve 12a is closed and water is supplied to collect water in the outer tub 10, and the drainage valve 12a is opened to open the inside of the outer tub 10 Of water can be discharged out of the machine.

  The outer tub 10 is supported in an anti-vibration manner by a suspension 13 (consisting of a coil spring and a damper) whose lower side is fixed to the base 1h. The upper side of the outer tub 10 is supported by an auxiliary spring (not shown) attached to the upper reinforcing member, and prevents the outer tub 10 from falling in the front-rear direction. In addition, an acceleration sensor (vibration detecting means) 63 that detects vibration acceleration due to vibration of the outer tub 10 is provided in the lower portion of the outer tub 10. The acceleration sensor 63 is a MEMS (Micro Electro Mechanical Systems) triaxial acceleration sensor having orthogonal vibration detection axes.

  The drying duct 18 is installed vertically inside the back surface of the housing 1, and the lower portion of the duct is connected to an air inlet 10 c provided below the back surface of the outer tub 10 through a rubber bellows tube A (18 a). A water-cooled dehumidifying mechanism (not shown) is built in the drying duct 18, and cooling water is supplied from the water supply valve 16a (see FIG. 4) to the water-cooled dehumidifying mechanism. The cooling water flows down along the wall surface of the drying duct 18, enters the outer tub 10 from the intake port 10 c, and is discharged from the drain port 10 d through the drain hose 12 to the outside of the machine.

The upper part of the drying duct 18 is connected to a filter duct 19 installed in the front-rear direction on the upper right side in the housing 1. The filter duct 19 has an opening on the front surface, and a drawer-type drying filter 20 is inserted into the opening. The dry filter 20 has a mesh filter portion 20a, and the air that has entered the filter duct 19 from the dry duct 18 flows into the mesh filter portion 20a of the dry filter 20, and lint is removed. The dry filter 20 is cleaned by pulling out the dry filter 20 and taking out the mesh filter portion 20a.
Further, an opening is provided in the lower surface of the insertion portion of the dry filter 20 of the filter duct 19, and the filter duct 19 and the intake duct 21 are connected by this opening.
Further, the other end of the intake duct 21 is connected to the intake port of the blower unit 22.

FIG. 3 is a right side view in which a part of the housing and the outer tub are cut to show the internal structure of the washing machine (drum type washing and drying machine) according to the first embodiment.
The blower unit 22 includes a driving fan motor 22a, a fan impeller (not shown), and a fan case 22b. The fan case 22b has a built-in heater 23 that heats air sent from the fan impeller.
The discharge port of the blower unit 22 is connected to the blower duct 24. The air duct 24 is connected to a blowout port 25 provided in the outer tank cover 10a through a rubber bellows tube B (24a). In FIG. 3, since the air blower unit 22 is provided on the upper right side in the housing 1, the air outlet 25 is provided at an upper right position of the outer tank cover 10a so that the distance to the air outlet 25 is as short as possible. It is.

  In this way, the air (arrow 31) that feeds wind from the outlet port of the blower unit 22 into the drum 8 through the bellows tube B (24 a) into the drum 8 passes through the through hole in the wall surface of the drum 8 to the outer tub 10. Through the inlet 10c provided below the back of the outer tub 10, the bellows tube A (18a) flows into the drying duct 18 (arrow 32), and is sucked into the inlets of the filter duct 19, the intake duct 21 and the blower unit 22. (Arrow 33), a circulation air passage is formed.

  Further, as shown in FIG. 2, the filter duct 19 includes an opening 19a for taking in air outside the circulation air passage inside the casing 1 of the washer / dryer, and an intake valve for closing the opening 19a. 19b. The intake valve 19b has a structure in which the opening 19a is opened by rotating about a rotation axis. Further, an intake valve motor 19c that rotates the rotation shaft of the intake valve 19b is provided.

<Control device 7>
FIG. 4 is a diagram illustrating a configuration of a control device for the drum type washing and drying machine according to the first embodiment.
The control device 7 is configured around a microcomputer (hereinafter referred to as a microcomputer) 70.
The microcomputer 70 includes an operation pattern database 71, a process control unit 72, a rotation speed calculation unit 73, a clothing weight calculation unit 74, a thick clothing determination unit 75, and an outer tub displacement amount calculation unit 76.

The microcomputer 70 has a function of calling an operation pattern corresponding to the operation course input from the operation switch 5 from the operation pattern database 71 and starting washing or / and drying. The process control unit 72 has a function of controlling the operation of each of the washing process, the rinsing process, the dehydration process (standard dehydration, thick material dehydration), and the drying process based on the operation pattern called from the operation pattern database 71.
In each process, the process control unit 72 has a function of controlling the water supply valve 16a and the drain valve 12a. The process control unit 72 controls driving of the motor 9 via the motor driving circuit 77, controls the fan motor 22 a via the fan motor driving circuit 78, and controls ON / OFF of the heater switch 79. 23, and controls the drive of the intake valve motor 19c via the intake valve motor drive circuit 80.

The rotation speed calculation unit 73 has a function of calculating the rotation speed of the motor 9 based on the detection value from the rotation detection device 61 that detects the rotation of the motor 9.
The clothing weight calculation unit 74 has a function of calculating the weight of clothing in the drum 8 based on the rotation speed calculated by the rotation speed calculation unit 73 and the detection value of the motor current detection device 62. Since the load for rotating the drum 8 increases due to the increase in the weight of clothing, a large amount of motor current flowing through the motor 9 is required. Therefore, the weight of the clothing is calculated from the motor current and the rotational speed of the motor 9. Can do.
The thick clothing discriminating unit 75 has a function of discriminating whether the clothing is clothing that is difficult to dehydrate based on the output value of the acceleration sensor 63, and will be described in detail later.
The outer tank displacement amount calculation unit 76 has a function of calculating the displacement amount of the outer tank 10 based on the output value of the acceleration sensor 63. Since the acceleration sensor 63 is a MEMS triaxial acceleration sensor and can detect vibration acceleration in the left-right direction, the front-rear direction, and the up-down direction, the outer tank displacement amount calculation unit 76 determines the displacement amount of the outer tank 10 in the left-right direction, front-rear direction It can be calculated for each of the direction and the vertical direction.

<Vibration of outer tank 10>
FIG. 5 is a schematic diagram viewed in the direction of the rotation axis from the opening side of the drum for explaining the relationship between the deviation of the clothing generated in the drum and the vibration of the outer tub.
When performing the washing, rinsing, and dehydration steps, the drum 8 containing the clothes is driven to rotate, so that the outer tub 10 containing the drum 8 vibrates. As shown in FIG. 5A, this is due to the fact that the clothing 35 inside the drum 8 contained in the outer tub 10 is offset.
When the drum 8 is rotated at a high speed in the dehydration process, the clothes in the drum 8 stick to the wall surface of the drum 8 by centrifugal force. At this time, as shown in FIG. 5 (a), if the clothing 35 is offset and exists in the drum 8, the rotating body (ie, the drum 8 and the clothing 35) rotated by the motor 9 (see FIG. 2) is mass-free. Since it is in a balanced state, it causes vibration due to mass imbalance, that is, unbalanced vibration. As a result, the outer tub 10 containing the drum 8 vibrates.
At this time, when the amount of clothes is small, the drum 8 is likely to be shifted (unbalanced), and in particular, in the case of clothes that are likely to be heavy with moisture, the unbalance vibration increases.

In the dehydration operation that is performed after the washing operation and the rinsing operation, the microcomputer 70 first opens the drain valve 12a and drains the water (rinse water) accumulated in the outer tub 10. Then, the motor 9 is driven to rotate the drum 8 at a low speed.
The moisture-containing clothing that has just finished rinsing operation is often present in the drum 8, and if the drum 8 is rotated at a high speed as it is, noise caused by large unbalance vibration and unbalance vibration. It will cause to generate.
Therefore, as shown in FIG. 5B, by rotating the drum 8 at a low speed, the clothes 35 are lifted along the outer peripheral wall by the lifter 8b (see FIG. 2) and centrifugal force, and the lifted clothes 35 are moved by gravity. The tumbling state falls due to. When this operation is performed, the clothing 35 is separated little by little, and it becomes easy to disperse.

As described above, in the dehydration operation, it is necessary to disperse the moisture-containing clothing in the drum 8 to some extent in order to reduce unbalance vibration and noise of the outer tub 10.
However, when a small amount of clothing containing a lot of moisture is dehydrated alone, it cannot be dispersed in the drum 8. For this reason, the clothes must be dehydrated in a state where they are somewhat offset (unbalanced).

Here, examples of clothing that easily contains moisture in a small amount include thick clothing such as bath mats and judo clothing. Thick clothing (bath mats, judo clothes, etc.) is heavy because it contains moisture during rinsing operation and cannot be dispersed in the drum 8 when it is dehydrated by one piece (small amount). Therefore, excessive unbalanced vibration is caused, and the dehydration operation is likely to be difficult. Furthermore, unpleasant noise and vibration are generated due to excessive unbalanced vibration.
In addition, clothes that are small in quantity but difficult to dehydrate, and clothes that easily contain water in a small amount will be described below as “thick clothes”.

<Operation of Drum Type Washer / Dryer S1>
The washing machine (drum type washing and drying machine S1) according to the first embodiment uses the vibration (vibration acceleration) of the outer tub 10 generated during the washing operation, and uses thick clothes (clothes with a small amount and a high water content, It is determined whether the clothes are difficult to dehydrate) and the operation of the dehydration process is controlled.
Therefore, the operation of the drum-type washing / drying machine S1 will be specifically described with reference to FIGS. 6 to 9 with reference to FIGS.

(Clothing weight judgment)
FIG. 6 is a flowchart showing operation control of the washing machine (drum type washing and drying machine) according to the first embodiment.
The user opens the door 2 of the drum-type washing / drying machine S1, puts clothes (laundry) into the drum 8 from the opening, closes the door 2, and operates the power switch 4 and the operation switch 5. Thus, the operation of the drum type washing and drying machine S1 is started.
When the operation of the drum type washing and drying machine S1 is started (step S101), the microcomputer 70 first rotates the drum 8 by driving the motor 9 via the motor drive circuit 77, and the clothing weight calculation unit of the microcomputer 70 is started. 74 detects the weight of clothes (laundry) put on the drum 8 (step S102). Here, dry clothes (laundry) are detected before the washing operation. The weight of the clothing is based on the rotation speed of the motor 9 calculated by the rotation speed calculation unit 73 using the detection value from the rotation detection device 61 and the motor current of the motor 9 that is the detection value of the motor current detection device 62. To calculate.

The thick clothing determination unit 75 of the microcomputer 70 determines whether or not the clothing weight calculated by the clothing weight calculation unit 74 in step S102 is less than a predetermined weight (for example, described as 1 kg in FIG. 6). (Step S103).
If the clothing weight is 1 kg or more (No in step S103), it is determined that the clothing can be dispersed in the drum 8 during dehydration rather than a small amount, and the routine moves to the standard operation (step S104). In the standard operation, the process control unit 72 controls the operation of each of the washing process, the rinsing process, the dehydration process (standard dehydration), and the drying process based on the operation pattern called from the operation pattern database 71.

  On the other hand, if the clothing weight is less than 1 kg (Yes in step S103), it is determined that the amount of clothing is small, and the process control unit 72 starts the washing operation in the washing process (step S105), and the thick clothing determination is performed. The unit 75 performs thick clothing determination (step S106).

(Thick clothing discrimination)
The thick clothing determination performed by the thick clothing determination unit 75 in step S106 will be described.
Details will be described with reference to a flowchart of FIG. 8 to be described later. Before that, first, a method for distinguishing thick clothing and standard clothing will be described with reference to FIG. 5B and FIG.
As shown in FIG. 5B, during the washing operation, the garment 35 is lifted along the outer peripheral wall by the lifter 8b (see FIG. 2) and centrifugal force, and the lifted garment 35 falls to the bottom of the drum 8 by gravity. It is beaten by being tumbled. Then, the outer tub 10 containing the drum 8 vibrates due to the impact when the clothing 35 is dropped, and the vibration acceleration is detected by the acceleration sensor 63 provided at the lower portion of the outer tub 10.

FIG. 7 is a graph showing the acceleration of the outer tub generated during the washing operation of the washing machine (drum type washing and drying machine) according to the first embodiment, and (a) shows the case of thick clothing (b). Indicates the case of standard clothing.
When washing thick clothing shown in FIG. 7 (a) with one piece (corresponding to 0.9 kg) and when washing standard clothing shown in FIG. 7 (b) (combination of practical clothing 0.9kg) When washing thick clothing with one piece, vibration acceleration due to impact generated when clothing is dropped is large and continuously generated at regular time intervals.
This occurs every time the thick garment collides with the drum 8, and the generation interval (reference time) is a time obtained by adding the time when the drum 8 is half-rotated (that is, the clothing lifting time) and the time when the clothing is dropped. It becomes. The reference time varies depending on the rotation speed of the drum 8, the inner diameter of the drum 8, and the like, but is set to 0.9 seconds in FIG.
In this manner, it is determined whether or not the clothes are thick clothes by determining whether or not the vibration acceleration due to the drop impact of the clothes is generated once every reference time (0.9 seconds). 6).

Next, the thick clothing determination performed by the thick clothing determination unit 75 will be described in detail with reference to FIG.
FIG. 8 is a flowchart showing thick clothing determination of the washing machine (drum type washing and drying machine) according to the first embodiment.
The thick clothing discriminating unit 75 resets a counter M that counts the number of times of peak acceleration measurement and a counter N that counts the number of times an acceleration equal to or greater than a threshold value described later is detected (M = 0, N = 0) (step S201). ).
The thick clothing discriminating unit 75 detects the acceleration Az in the vertical direction of the outer tub 10 using the acceleration sensor 63 (see FIG. 2) provided at the lower part of the outer tub 10 (see FIG. 2) (step S202). .
The thick clothing determination unit 75 repeats step S202 until the reference time has elapsed (No in step S203), and proceeds to step S204 when the reference time has elapsed.
Note that the reference time is a time obtained by adding the time when the drum 8 rotates halfway (that is, the clothing lifting time) and the time when the clothing falls, and is set to 0.9 seconds in FIG.

The thick clothing discriminating unit 75 extracts the peak acceleration Ap which is the maximum value among the accelerations Az detected within the reference time (step S204).
The thick clothing discriminating unit 75 determines whether or not the peak acceleration Ap is larger than the threshold acceleration As (step S205). In FIG. 7, the threshold acceleration As is set to 9 [m / s ² ].

When the peak acceleration Ap is larger than the threshold acceleration As (Yes in Step S205), the thick clothing determination unit 75 adds 1 to the counter N (Step S206), and proceeds to Step S207.
On the other hand, when the peak acceleration Ap is equal to or less than the threshold acceleration As (No in step S205), the thick clothing determination unit 75 does not add the counter N and proceeds to step S207.

In step S207, the thick clothing determination unit 75 adds 1 to the counter M.
In step S208, the thick clothing determination unit 75 determines whether or not the counter M is less than 100 (step S208).
When the counter M is less than 100 (Yes in Step S208), the process returns to Step S202, and the thick clothing determination unit 75 repeats Step S202 to Step S207.

When the counter M is 100 or more (No in Step S208), the process proceeds to Step S209, and the thick clothing determination unit 75 determines whether or not the counter N is 80 or more.
If the counter N is equal to or greater than 80 (Yes in Step S209), the thick clothing determination unit 75 determines that the clothing in the drum 8 is “thick clothing” (Step S210).
On the other hand, if the counter N is less than 80 (No in step S209), the thick clothing determination unit 75 determines that the clothing in the drum 8 is “standard clothing” (step S211).

Note that the thick clothing discrimination shown in FIG. 8 is executed at the end of the washing process. For example, thick clothing discrimination is started 150 seconds before the end of the washing process.
This is because if the heavy clothing is determined immediately after the start of the washing process, the clothing does not contain sufficient moisture, which may cause an erroneous determination.

In step S204 and step S206, the peak acceleration Ap (the maximum value of the acceleration Az within the reference time) is used for determination. However, the crest factor of acceleration may be used.
That is, a crest factor that is a ratio (maximum value / effective value) of the effective value of the acceleration Az within the reference time and the maximum value of the acceleration Az within the reference time is obtained, and exceeds a predetermined crest factor (threshold). In this case, the counter N may be incremented by 1.

  Moreover, although it demonstrated as what detects the acceleration Az of the up-down direction of the outer tank 10 in step S202, you may use the acceleration of the front-back direction and the left-right direction. This is because the outer tub 10 is inclined and arranged so that the opening 10b (see FIG. 2) side is higher, and acceleration due to the drop of clothes also occurs in the front-rear direction. Moreover, since clothing falls from the rotating drum 8, acceleration in the left-right direction also occurs. Therefore, it is also effective to add and evaluate the acceleration in the vertical direction, the front-rear direction, and the horizontal direction. Furthermore, the magnitude of the actual drop direction acceleration of the garment can be calculated from the magnitude of the three-direction acceleration, and it is possible to increase the accuracy compared with the determination based only on the magnitude of the vertical direction acceleration.

(Thick clothing dehydration operation)
In the thick clothing discrimination executed by the thick clothing discriminating unit 75 at the end of the washing process, when it is discriminated as the standard clothing, the process control unit 72 performs the rinsing process, the dehydrating process (standard dehydration) after the washing process is completed. The operation of each process of the drying process is controlled.
On the other hand, in the thick clothing discrimination performed at the end of the washing process, if it is determined that the clothing is thick clothing, after the washing step, the process control unit 72 performs a rinsing process, a dehydrating process (thick article dehydration), and a drying process. Operation control of each process is performed.
Hereinafter, the dehydration process (thick dehydration) when it is determined as thick clothing will be described.

When it is determined that the clothes are thick clothes, a process of removing moisture from the thick clothes in the drum 8 as much as possible is performed in the initial stage of the dehydration process.
Here, the behavior of the outer tub 10 is monitored as a method for determining that moisture has been removed from the clothing. As described above, during the dehydration operation, vibration due to mass imbalance, that is, unbalanced vibration is caused. This unbalanced vibration depends on the unbalanced amount.
The amount of unbalance is a combination of the clothing that is offset in the drum 8 and the amount of moisture contained in the clothing. By removing moisture from the clothing, the amount of unbalance is reduced and unbalance vibration is also reduced.
That is, it is possible to confirm that moisture has been removed from the garment by monitoring the unbalanced vibration and monitoring the decrease in the unbalanced vibration.

With reference to FIG. 9, the dehydration process for thick clothing will be further described.
FIG. 9 is a flowchart showing an operation at the initial stage of the dehydration process for thick clothes of the washing machine (drum type washing and drying machine) according to the first embodiment.
The process control unit 72 of the microcomputer 70 opens the drain valve 12a and drains water (rinse water) accumulated in the outer tub 10. And the motor 9 is driven, the drum 8 is rotated, and heavy clothing dehydration is started (step S301).
The rotation speed calculation unit 73 of the microcomputer 70 calculates the rotation speed RS of the motor 9 based on the detection value from the rotation detection device 61 that detects the rotation of the motor 9 (step S302).
The process control unit 72 determines whether or not the rotation speed RS calculated in step S302 is greater than 110 rpm (rotation / minute) (step S303).
In step S303, when the rotation speed RS is 110 rpm or less (No in step S303), the process control unit 72 increases the rotation speed RS of the motor 9 (step S304) and returns to step S302.
In step S303, when the rotation speed RS is higher than 110 rpm (Yes in step S303), the process proceeds to step S305.
Note that the clothing gradually sticks to the wall surface of the drum 8 when the rotational speed RS exceeds 60 rpm. Further, 110 rpm is a slightly lower rotational speed than the resonant rotational speed (for example, 150 rpm) at which the outer tub 10 vibrates greatly.

In step S <b> 305, the outer tank displacement amount calculation unit 76 of the microcomputer 70 calculates the displacement amount ΔX in the left-right direction of the outer tank 10 based on the output value of the acceleration sensor 63.
The process control unit 72 determines whether or not the lateral displacement amount ΔX of the outer tub 10 calculated in step S305 is smaller than a predetermined threshold value Sx (step S306).

  In step S306, when the displacement amount ΔX is greater than or equal to the threshold value Sx (No in step S306), the process control unit 72 stops the dehydration operation (step S307), and dehydration is difficult for the display 6 (see FIG. 1). Is displayed to notify the user (step S308). Such notification can prompt the user to add clothing to be dehydrated.

  In step S306, when the displacement amount ΔX is less than the threshold value Sx (Yes in step S306), the process control unit 72 determines whether or not the displacement amount ΔX is larger than 90% (0.9Sx) of the threshold value Sx (step S306). S309).

  In step S309, when the displacement amount ΔX is 90% (0.9Sx) or less of the threshold value Sx (No in step S309), the process control unit 72 determines that the displacement amount ΔX is not near the threshold value Sx, and the process control unit 72 determines the rotational speed of the motor 9. The rotational speed of RS is increased by 2 rpm (step S310), and the process proceeds to step S314.

  In step S309, when the displacement amount ΔX is larger than 90% (0.9Sx) of the threshold value Sx (Yes in step S309), the process control unit 72 assumes that the displacement amount ΔX is close to the threshold value Sx, and the process control unit 72 determines the rotational speed of the motor 9. While maintaining the RS, the outer tank displacement amount calculation unit 76 calculates the displacement amount ΔX 50 times at a predetermined interval (for example, every 0.5 seconds) (step S311). That is, low-speed centrifugal dewatering is performed for 25 seconds while maintaining a rotational speed RS that is larger than 110 rpm and smaller than the resonant rotational speed 150 rpm.

Step S311 compares the first amount of displacement [Delta] X ₁ and 50th displacement [Delta] X ₅₀ calculated in, determines whether or not the first amount of displacement [Delta] X ₁ is equal to or less than 50 th displacement [Delta] X ₅₀ (Step S312).

In step S312, the case first displacement amount [Delta] X ₁ is larger than the 50th of the amount of displacement [Delta] X ₅₀ (No at step S312), the process proceeds to step S314. This means that the moisture is removed from the clothing by low-speed centrifugal dehydration, and the unbalance vibration (that is, the displacement amount ΔX of the outer tub 10) is reduced by reducing the unbalance amount.

In step S312, the case first displacement amount [Delta] X ₁ is equal to or less than 50th of the amount of displacement [Delta] X ₅₀ (Yes at step S312), i.e., if the reduction of the unbalance amount is not found, the process proceeds to step S313, step The control unit 72 reduces the rotational speed RS of the motor 9 to a rotational speed (for example, 40 rpm) that is smaller than the rotational speed at which the clothes stick to the wall surface of the drum 8 by centrifugal force (step S313). Thereafter, the process returns to step S302.
By controlling in this way, the clothes attached to the wall surface of the drum 8 are once peeled off, and the rotation speed is increased again to attach the clothes to the wall surface of the drum 8, thereby changing how the clothes are attached.

In step S314, the process control unit 72 determines whether or not the rotational speed RS of the motor 9 is 150 rpm or higher.
If the rotational speed RS is less than 150 rpm (No in step S314), the process returns to step S305.
If the rotation speed RS is 150 rpm or more (Yes in step S314), the process proceeds to step S315, and the dehydration operation is continued by allowing the resonance rotation speed (150 rpm) of the outer tub 10 to pass.
The dehydration operation after passing the resonance rotational speed of 150 rpm is performed by increasing the rotational speed RS of the motor 9 while the process management unit 72 monitors the displacement amount of the outer tub 10 as in the case of the standard clothing. Is rotated at a high speed (for example, 900 rpm), and high-speed centrifugal dehydration of clothing is performed while maintaining the rotation speed.

As a result, it becomes possible to efficiently remove moisture from the thick clothing at the beginning of the dehydration operation, the outer tub 10 abnormally vibrates near the resonance rotational speed of the outer tub 10, and the dehydration activation fails, and the dehydration activation is restarted. The extension of the dehydration operation time can be prevented.
Furthermore, by reducing the unbalance amount during the dehydration operation, unpleasant vibrations and noises of the outer tub 10 and the case 1 of the drum type washing and drying machine S1 at the time of dehydration start can be reduced.
Moreover, since thick clothing discrimination is performed using an acceleration sensor (vibration detection means) 63 that detects vibration of the outer tub 10, no new parts are required for thick clothing discrimination, and an increase in cost is suppressed. Can do.

FIG. 10 is a process diagram of the washing and drying operation of the washing machine (drum type washing and drying machine) according to the first embodiment.
The drum-type washing dryer S1 includes a washing step 51, a rinsing step (rinsing step 52, an intermediate dehydrating step 53, a rinsing step 54, an intermediate dehydrating step 55), a dehydrating step (final dehydrating step 56), and a drying step. 57 is executed.
As described above, the thick clothing discrimination performed by the thick clothing discriminating unit 75 has been described as being performed at the end of the washing step 51, but the thick clothing discrimination is not limited to the washing step 51. As shown in FIG. 10, thick clothing determination is performed at the beginning of the intermediate dehydration steps 53 and 55 during the rinsing step and the dehydration step (final dehydration step 56) (the state before the clothing is attached to the wall surface of the drum 8). May be.

<< Second Embodiment >>
FIG. 11 is a side cross-sectional view of a washing machine (vertical washer / dryer) according to the second embodiment.
<Vertical type washing dryer S2>
First, there is a housing 81, and a lid 82 is provided on the top of the housing 81 so as to close an opening for taking in and out clothes (laundry). An outer tub 83 is elastically supported and arranged inside the housing 81. The outer tub 83 has a washing / dehydrating tub 84 and can be driven to rotate by a drive mechanism 85 disposed on the bottom surface of the outer tub 83.
The drive mechanism 85 has a clutch mechanism (not shown), and can drive the stirring blade 86 in the washing and dewatering tub 84 to rotate clockwise or counterclockwise.
An operation switch 87 and a display 88 are provided on the top of the housing 81.

The drive mechanism 85 includes a rotation detection device 91 that detects the rotation of a motor (not shown) in the drive mechanism 85 and a motor current detection device 92. An acceleration sensor 93 is provided at the bottom of the outer tub 83.
The operation switch 87, the display 88, the rotation detection device 91, the motor current detection device 92 and the acceleration sensor 93 are connected to the control device 89. Similar to the control device 7 of the first embodiment, the control device 89 is configured around the microcomputer 70 (see FIG. 4), and the description thereof is omitted. The drive mechanism 85 is controlled by the control device 89 so that the clutch mechanism and the motor drive.

FIG. 12 is a schematic diagram viewed from the opening side of the washing and dewatering tub in the direction of the rotation axis, explaining the relationship between the garment deviation generated in the washing and dewatering tub and the vibration of the outer tub.
When the washing operation is performed, the clothes 36 in the washing and dewatering tub 84 are stirred by the stirring blade 86 (see FIG. 11). However, when the clothes 36 is one piece of thick clothes, the state where the clothes 36 are offset is continued. . At this time, although the amount of clothing is small, a large unbalance vibration is generated due to the high water content.

FIG. 13 is a graph showing the acceleration of the outer tub generated during the washing operation of the washing machine (vertical washer / dryer) according to the second embodiment, where (a) shows the case of heavy clothing (b). Indicates the case of standard clothing.
As shown in FIG. 13A, when one piece of thick clothing is washed (corresponding to 0.9 kg), vibration (vibration acceleration) is continuously generated in the outer tub 83 at regular time intervals.
On the other hand, as shown in FIG. 13 (b), when washing standard clothes (combination of practical clothes: 0.9kg), the clothes in the washing and dewatering tub 84 are agitated by the movement of the agitating blade 86 and washed. The case where the cum in the dehydration tub 84 is shifted to the case where it is evenly scattered in the washing / dehydration tub 84 without being shifted will be switched. Accordingly, there are a case where a relatively large unbalance vibration is generated due to the deviation of the clothes and a case where the clothes are scattered evenly and the unbalance vibration is small.

Using this difference, it is possible to determine thick clothing.
That is, if the acceleration exceeds a certain value and the clothes are stirred by the movement of the stirring blade 86 but the acceleration fluctuation is small or the acceleration occurs at a certain interval, it is determined that the thick clothes are being washed. can do.
In this way, it is possible to determine whether the clothes are thick clothing from the magnitude of the acceleration detected by the acceleration sensor 93 provided at the bottom of the outer tub 93 and the duration, amount of fluctuation, or frequency of the acceleration. .
Hereinafter, in the second embodiment, a case will be described in which thick clothing determination is performed using a frequency at which a certain acceleration occurs.

(Clothing weight judgment)
Operation control of the washing machine (vertical washer / dryer S2) according to the second embodiment will be described.
Similarly to the washing machine (drum type washing dryer S1) according to the first embodiment, the washing machine (vertical type washing dryer S2) according to the second embodiment also removes the clothes in the washing and dewatering tub 84 before the washing operation. When the clothing weight is detected and the clothing weight is equal to or less than a predetermined weight (for example, 1 kg), thick clothing discrimination described later is performed. Note that the determination of whether or not to perform thick clothing determination in the second embodiment is the same as in the first embodiment (see FIG. 6), and the description thereof is omitted.

(Thick clothing discrimination)
Next, the thick clothing determination performed by the thick clothing determination unit of the control device 89 will be described with reference to FIG.
FIG. 14 is a flowchart showing thick clothing determination of the washing machine (vertical washing and drying machine) according to the second embodiment.
The thick clothing discriminating unit of the control device 89 resets a counter M that counts the number of times of peak acceleration measurement and a counter N that counts the number of times an acceleration equal to or greater than a threshold value described later is detected (M = 0, N = 0). (Step S401).
The thick clothing discriminating unit detects the acceleration At in the tangential direction (see FIG. 12) of the outer tub 83 using the acceleration sensor 93 (see FIG. 11) provided at the lower part of the outer tub 83 (see FIG. 11). (Step S402).
The thick clothing determination unit repeats step S402 until the reference time elapses (No in step S403), and proceeds to step S404 when the reference time elapses.
The reference time is desirably set according to the operation of the vertical washer / dryer S2 (the rotational speed of the stirring blade 86, etc.). In FIG. 13, it is assumed that the reference time is set to 3.5 seconds.

The thick clothing discriminating unit extracts the peak acceleration Ap ′ that is the maximum value among the accelerations At detected within the reference time (step S404).
The thick clothing determination unit determines whether or not the peak acceleration Ap ′ is greater than the threshold acceleration As ′ (step S405). In FIG. 13, the threshold acceleration As ′ is set to 12 [m / s ² ].

When the peak acceleration Ap ′ is greater than the threshold acceleration As ′ (Yes in step S405), the thick clothing determination unit adds 1 to the counter N (step S406), and the process proceeds to step S407.
On the other hand, when the peak acceleration Ap ′ is equal to or less than the threshold acceleration As ′ (No in step S405), the thick clothing determination unit does not add the counter N and proceeds to step S407.

In step S407, the thick clothing determination unit increments the counter M by one.
In step S408, the thick clothing determination unit determines whether or not the counter M is less than 100 (step S408).
If the counter M is less than 100 (Yes in step S408), the process returns to step S402, and the thick clothing determination unit repeats steps S402 to S407.

When the counter M is 100 or more (No in step S408), the process proceeds to step S409, and the thick clothing determination unit determines whether or not the counter N is 80 or more.
If the counter N is equal to or greater than 80 (Yes in step S409), the thick clothing discriminating unit discriminates that the clothing in the washing and dewatering tank 84 is “thick clothing” (step S410).
On the other hand, if the counter N is less than 80 (No in step S409), the thick clothing determination unit determines that the clothing in the washing and dewatering tub 84 is “standard clothing” (step S411).

  Note that the thick clothing discrimination shown in FIG. 14 is executed at the end of the washing process. For example, thick clothing discrimination is started 350 seconds before the end of the washing process.

(Thick clothing dehydration operation)
In the thick clothing determination shown in FIG. 14, when it is determined that the clothing is thick clothing, the control is changed to control to remove moisture as much as possible at the beginning of the dehydration process.
FIG. 15 is a flowchart showing an operation in the initial stage of the dehydration process for thick clothes of the washing machine (vertical washing and drying machine) according to the second embodiment.
The process control unit of the control device 89 opens the drain valve 90 and drains the water (rinse water) accumulated in the outer tub 83. Then, the drive mechanism 85 switches the clutch mechanism so that the washing / dehydrating tub 84 rotates and drives the motor to rotate the washing / dehydrating tub 84 to start dehydration of thick clothes (step S501).
The rotation speed calculation unit of the control device 89 calculates the rotation speed RS of the motor based on the detection value from the rotation detection device 91 that detects the rotation of the motor of the drive mechanism 85 (step S502).
The process control unit determines whether or not the rotation speed RS calculated in step S502 is greater than 70 rpm (rotation / minute) (step S503).
In step S503, when the rotation speed RS is equal to or lower than 70 rpm (No in step S503), the process control unit increases the rotation speed RS of the motor (step S504) and returns to step S502.
If the rotational speed RS is greater than 70 rpm in step S503 (Yes in step S503), the process proceeds to step S505.
70 rpm is a slightly lower rotational speed than the resonant rotational speed (for example, 100 rpm) at which the outer tub 83 of the vertical washing dryer S2 vibrates greatly.

In step S <b> 505, the outer tank displacement amount calculation unit of the control device 89 calculates the displacement amount ΔT in the tangential direction of the outer tank 83 based on the output value of the acceleration sensor 93.
The process control unit determines whether or not the displacement amount ΔT in the tangential direction of the outer tub 83 calculated in step S505 is smaller than a predetermined threshold value St (step S506).

  If the displacement amount ΔT is greater than or equal to the threshold value St in step S506 (No in step S506), the process control unit stops the dehydration operation (step S507), and the display 88 (see FIG. 11) indicates that dehydration is difficult. The information is displayed and notified to the user (step S508). Such notification can prompt the user to add clothing to be dehydrated.

  In step S506, when the displacement amount ΔT is less than the threshold value St (Yes in step S506), the process control unit determines whether the displacement amount ΔT is larger than 90% (0.9St) of the threshold value St (step S509). ).

  In step S509, when the displacement amount ΔT is 90% (0.9St) or less of the threshold value St (No in step S509), the process control unit assumes that the displacement amount ΔT is not in the vicinity of the threshold value St, and the process control unit determines the rotational speed RS of the motor 9. Is increased by 2 rpm (step S510), and the process proceeds to step S514.

  In step S509, when the displacement amount ΔT is larger than 90% (0.9St) of the threshold value St (Yes in step S509), the process control unit determines that the displacement amount ΔT is in the vicinity of the threshold value St, and the process control unit While maintaining the rotation speed RS, the outer tank displacement amount calculation unit calculates the displacement amount ΔT 25 times at a predetermined interval (for example, every 1.0 second) (step S511). That is, low-speed centrifugal dehydration is performed for 25 seconds while maintaining a rotational speed RS that is larger than 70 rpm and smaller than the resonant rotational speed 100 rpm.

Step S511 compares the calculated first displacement amount [Delta] T ₁ and the 25-th displacement [Delta] T _25, the first displacement amount [Delta] X ₁ is equal to or less than 25-th displacement [Delta] T ₂₅ (Step S512).

If the first displacement amount ΔT ₁ is larger than the _25th displacement amount ΔT _{25 in} step S512 (No in step S512), the process proceeds to step S514. This means that the moisture is removed from the clothing by low-speed centrifugal dehydration and the unbalance amount is reduced, so that the unbalance vibration (that is, the displacement amount ΔT in the tangential direction of the outer tub 83) is reduced.

In step S512, when the first amount of displacement [Delta] T ₁ is equal to or less than 25 th displacement [Delta] T ₂₅ (Yes at step S512), i.e., if the reduction of the unbalance amount is not found, the process proceeds to step S513, step The control unit stops the rotation of the washing / dehydrating tub 84, switches the clutch mechanism of the drive mechanism 85 so that the stirring blade 86 rotates, and performs the loosening operation that repeats forward and reverse rotations with the motor of the drive mechanism 85. (Step S513). Thereafter, the clutch mechanism is switched so that the washing / dehydrating tub 84 rotates the drive mechanism 85, and the process returns to step S502.
By controlling in this way, the clothes stuck to the wall surface of the washing and dewatering tank 84 are peeled off once, and the way the clothes are stuck is changed.

In step S514, the process control unit determines whether the rotation speed RS of the motor of the drive mechanism 85 is 100 rpm or more.
If the rotational speed RS is less than 100 rpm (No in step S514), the process returns to step S505.
When the rotational speed RS is 100 rpm or more (Yes in Step S514), the process proceeds to Step S515, the resonance rotational speed (100 rpm) of the outer tub 10 can be passed, and the dehydration operation is continued.
The dehydration operation after passing the resonance rotational speed of 100 rpm is performed by increasing the rotational speed RS of the motor of the drive mechanism 85 while the process management unit monitors the displacement amount of the outer tub 83 as in the case of standard clothing. The washing / dehydration tank 84 is rotated at a high speed (for example, 900 rpm), and the clothes are subjected to high-speed centrifugal dehydration while maintaining the rotation speed.

As a result, it becomes possible to efficiently remove moisture from the thick clothing at the initial stage of the dehydration operation, the outer tub 83 abnormally vibrates near the resonance rotational speed of the outer tub 83, the dehydration activation fails, and the dehydration activation is restarted. The extension of the dehydration operation time can be prevented.
Furthermore, unpleasant vibrations and noises of the outer tub 83 and the casing 81 of the vertical washer / dryer S2 at the start of dehydration can be reduced by reducing the amount of unbalance during the dehydration operation.
Moreover, since thick clothing discrimination is performed using an acceleration sensor (vibration detecting means) 93 that detects vibration of the outer tub 83, no new parts are required for thick clothing discrimination, and an increase in cost is suppressed. Can do.

DESCRIPTION OF SYMBOLS 1 Case 5 Operation switch 7 Control apparatus (control means)
8 drums (washing and dewatering tank)
8b Lifter 9 Motor (drive means)
10 Outer tub 35 Clothing 61 Rotation detection device (rotation speed detection means)
62 Motor current detection device 63 Acceleration sensor (vibration detection means)
70 microcomputer 71 operation pattern database 72 process control unit 73 rotation speed calculation unit (rotation speed detection means)
74 Clothing weight calculation unit 75 Thick clothing discrimination unit (clothing discrimination means)
76 Outer tub displacement calculation unit 81 Housing 82 Lid 83 Outer tub 84 Washing / dehydration tub 85 Drive mechanism (drive means)
86 Stirring blade 87 Operation switch 88 Indicator 89 Control device (control means)
91 Rotation detection device (rotation speed detection means)
92 Motor current detection device 93 Acceleration sensor (vibration detection means)

Claims (5)

A housing,
An outer tub disposed inside the housing and elastically supported by an elastic support;
A rotatable washing and dewatering tank disposed inside the outer tub;
Drive means for rotationally driving the washing and dewatering tub;
Vibration detecting means for detecting the vibration state of the outer tub,
In a washing machine having control means for controlling the drive means based on an output signal from the vibration detection means,
The control means includes
A clothing discriminating means for discriminating whether the clothing in the washing and dewatering tub is difficult to dehydrate from the output signal of the vibration detecting means;
A washing machine characterized by performing a step of removing moisture from clothing at the beginning of the dehydration operation when the clothing discrimination means determines that the clothing is difficult to dehydrate. The washing machine
A drum washing machine in which a rotating shaft of the washing and dewatering tub is arranged in a substantially horizontal direction;
The clothing discrimination means
The washing machine according to claim 1, wherein the clothes are identified based on vibration acceleration generated during a washing process in which clothes are lifted and dropped during a washing operation. The washing machine
A vertical washing machine in which the rotation axis of the washing and dewatering tub is arranged in a substantially vertical direction;
The clothing discrimination means
The washing machine according to claim 1, wherein the clothes are identified based on vibration acceleration caused by the deviation of the clothes during the washing operation. The vibration detection means includes
The washing machine according to any one of claims 1 to 3, wherein the washing machine is configured by a MEMS triaxial acceleration sensor. The control means includes
The message prompting the addition of clothes is informed when it is judged that dehydration is impossible even if the process of removing moisture from clothes is performed in the initial stage of dehydration. The washing machine described.

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