JP2017158946A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of urging infiltration of water into laundry without prolonging time required for a washing operation.SOLUTION: A washing machine 1 according to an embodiment comprises: a washing and spinning tub 4; an agitation blade 5; a water supply path 9; a water level sensor 19; and a control part 7. The control part can perform: tub rotation water supply in which water is supplied while the washing and spinning tub 4 and the agitation blade 5 are integrally rotated; and agitation water supply in which water is supplied while the rotation of the washing and spinning tub 4 is stopped and the agitation blade 5 is rotated alone. In a water supply period for supplying water to a target water level, the tub rotation water supply is performed in a first period until reaching a preset first water level, the agitation water supply is performed in a second period from elapse of the first period until reaching a preset second water level, and the tub rotation water supply is performed in a third period from the elapse of the second period until reaching the target water level.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a washing machine.

  In the case of a washing machine that performs a washing process after supplying water with a detergent, when it is operated at a high load near the rated load, that is, near the maximum value of the allowable laundry weight, It may be difficult to penetrate water evenly. And as a result of the water not permeating uniformly, there is a possibility that unevenness occurs in the cleaning performance. Therefore, for example, Patent Document 1 proposes a washing machine that can promote the penetration of water into the laundry during a high load.

JP 2014-18285 A

However, when relatively light clothing such as fleece or clothing with low water absorption is contained in the laundry, the light clothing may float in the water when water is supplied, and the water cannot be sufficiently infiltrated. There is a case. In addition, if the water supply stroke is lengthened in order to sufficiently permeate water, the time required for the washing operation becomes long as a result.
Therefore, a washing machine is provided that can promote the penetration of water into the laundry without lengthening the time required for the washing operation.

  The washing machine according to the embodiment includes a laundry dewatering tank, a stirring blade, a water supply path, a water level sensor, and a control unit, and a tank rotation water supply that supplies water while rotating the laundry dewatering tank and the stirring blade integrally. While stopping the rotation of the washing and dewatering tank, it is possible to execute stirring water supply that supplies water while rotating the stirring blade alone, and until the first water level set in advance is reached in the water supply period for supplying water to the target water level In the first period, the tank rotation water supply is executed, and the stirring water supply is executed in the second period from the time when the first period has elapsed until the second water level is set in advance. In the third period from when the time elapses until the target water level is reached, the tank rotation water supply is executed.

The figure which shows typically the structure of the washing machine by 1st Embodiment. The figure which shows typically an example of the state of the laundry at the time of a water supply process The figure which shows the operation of the washing dewatering tank and the stirring blade during the water supply process The figure which shows operation | movement of the washing dewatering tank and the stirring blade at the time of the water supply process by 2nd Embodiment

Hereinafter, a plurality of embodiments will be described with reference to the drawings. In addition, in each embodiment, the same code | symbol is attached | subjected and demonstrated to the substantially same component.
(First embodiment)
Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, the washing machine 1 includes a main body 2, a water tank 3, a washing and dewatering tank 4, a stirring blade 5, a drive unit 6, a control unit 7, an operation panel 8, and the like. The main body 2 is generally formed in a quadrangular prism shape and accommodates a water tank 3 and the like. The water tank 3 is generally formed in a bottomed cylindrical shape, and stores water in a washing process or an excessive process. The washing / dehydrating tank 4 is rotatably provided in the water tank 3 and rotates relative to the water tank 3. During the washing operation, the openings of the water tank 3 and the washing / dehydrating tank 4 are closed by the lid member 4a.

  The stirring blade 5 is also called a pulsator or the like, and can be rotated integrally with the washing / dehydrating tank 4 and can be rotated independently of the washing / dehydrating tank 4. The washing / dehydrating tub 4 and the stirring blade 5 are rotationally driven by a driving unit 6 having a clutch mechanism (not shown). Hereinafter, the fact that the stirring blade 5 rotates integrally with the washing / dehydrating tub 4 is referred to as integral rotation for convenience, and the fact that the stirring blade 5 rotates independently independently of the washing / dehydrating tub 4 is referred to as independent rotation. This is called rotation. These integral rotation and single rotation are switched by a clutch mechanism.

  The control unit 7 includes a microcomputer having a CPU, a ROM, a RAM, and the like (not shown), and controls the entire washing machine 1. The control unit 7 controls the washing machine 1 according to the type of clothes, the driving course, and the like input from the operation panel 8. Moreover, although the detail is mentioned later, the control part 7 sets a target water level, a 1st water level, and a 2nd water level.

  The operation panel 8 includes a power switch (not shown), a selection switch for selecting an operation course, an energy saving mode, a weight setting switch for indicating the weight of the laundry 20 to be put in, and a water level for setting the water level during the washing process. It consists of a switch and a display for displaying various information. The operation switch displays a time required for the washing operation, a current operation mode, and the like while a user operation is input. In the case of this embodiment, the operation panel 8 is also provided with a switch for selecting the type of detergent, that is, whether it is a liquid detergent or a powder detergent. The operation panel 8 corresponds to a detergent specifying part.

  Above the water tank 3 and the washing / dehydrating tank 4, a water supply path 9 for supplying water into the washing / dehydrating tank 4 from above the washing / dehydrating tank 4 is provided. The water supply path 9 includes a water supply valve unit 10, a detergent case 11, a water supply port 12, a UFB generator 13, and the like. The water supply valve unit 10 is provided with a tap water introduction port 14 connected to a faucet for introducing tap water, and a bath water introduction port 15 for introducing bath water or the like. In addition, the bath water introduction port 15 does not necessarily need to be provided, and may be configured to also serve as the tap water introduction port 14.

  A heater 16 as a heating unit is provided in the water supply valve unit 10. In the present embodiment, a temperature sensor 17 that detects the temperature of water is provided in the water supply valve unit 10. The temperature sensor 17 corresponds to a temperature specifying unit that specifies the temperature of water flowing through the water supply path 9. The operation panel 8 is provided with a selection switch for washing whether to use bath water, more specifically, whether to use water having a relatively high temperature immediately after bathing, and is used as a temperature specifying unit. May be.

  The detergent case 11 is loaded with a detergent used for washing. The detergent case 11 can be filled with either liquid detergent or powder detergent. In addition, you may further provide the softener case which throws in a softener. The detergent case 11 is provided in the water supply path 9. Therefore, water in which the detergent is dissolved is supplied to the laundry dewatering tank 4. In other words, the detergent put into the detergent case 11 is supplied into the washing and dewatering tank 4 together with the water flowing through the water supply path 9.

  The UFB generator 13 generates fine bubbles having a particle size of less than about 1 micron, and causes the generated fine bubbles to be contained in the water flowing through the water supply path 9. The fine bubbles having a particle size of less than about 1 micron are also called UFB (Ultra Fine Bubble) and are known to improve the washing performance. The UFB generator 13 corresponds to a fine bubble containing part.

  In addition, the laundry dewatering tub 4 is provided with a weight sensor 18 that detects the weight of the laundry 20. In the present embodiment, the control unit 7 sets a target water level that is a water level during the washing process, based on the weight of the laundry 20 detected by the weight sensor 18. The weight sensor 18 may directly detect the weight, but may be configured to detect the weight indirectly by estimating based on a control value when controlling the motor of the drive unit 6. . As described above, the weight can also be set from the operation panel 8. The weight sensor 18 and the operation panel 8 constitute a weight specifying unit that specifies the weight of the laundry 20 and function as a target water level setting unit that sets a target water level.

  Further, the washing machine 1 is provided with a water level sensor 19 for detecting the water level in an air tube (not shown) connected to the water tub 3. The position and configuration of the water level sensor 19 are not limited to this.

Next, the operation of the above configuration will be described.
In the case of the washing machine 1 that executes the washing process after supplying water with the detergent, when the laundry 20 is operated at a high load near the rated load, that is, near the maximum value of the allowable weight of the laundry 20, It may be difficult to evenly penetrate water throughout. Further, for example, as shown in FIG. 2, the laundry 20a that is relatively light or has low water absorption may float on the water.

  In the case of the washing machine 1, since the water in which the detergent is dissolved is supplied as described above, the water in which the detergent is dissolved cannot be sufficiently permeated in the state of floating in the water like the laundry 20a. Capability may be reduced. However, even if the amount of water supply is simply increased, it is not always possible to sufficiently infiltrate the laundry 20a floating in the water, and it can be determined that the water has been sufficiently infiltrated. The longer the water supply stroke, the longer the time required for the washing operation.

Therefore, the washing machine 1 of the present embodiment sufficiently permeates the laundry 20 without increasing the time required for the washing operation as follows.
FIG. 3 shows the process when the washing operation is started and the operation of each part in the process over time. Note that the right direction in FIG. 3 indicates the passage of time. In addition, although the following control is performed by the control part 7, it demonstrates focusing on the washing machine 1 for the simplification of description.

  When the laundry 20 is put in and the start operation is performed, the washing machine 1 shifts to a water supply stroke, starts water supply from the water supply path 9, and starts rotating the laundry dewatering tub 4. At this time, the stirring blade 5 is operated by integral rotation that rotates integrally with the washing and dewatering tank 4. That is, tank rotation water supply is started. At this time, the target water level is set based on the detection result of the weight sensor 18 or the weight of the laundry 20 specified by the user's setting operation.

  The washing machine 1 continues the tank rotation water supply until the water level in the washing and dewatering tank 4 reaches the first water level. Thereby, at the initial stage when water supply is started, the water supplied from above the washing / dehydrating tub 4 is applied to the laundry 20 rotating together with the washing / dehydrating tub 4. However, water is not directly applied to the laundry 20 located below. A period from when the water supply is started until the first water level is reached corresponds to the first period. At this time, the washing machine 1 sets the first water level to a range of 1/3 to 2/3 of the target water level.

  That is, the first water level is set so that a certain amount of water has accumulated in the washing and dewatering tub 4 and a certain amount of time remains until the target water level is reached. In other words, the washing machine 1 waits for a certain amount of water to accumulate before starting the agitation water supply, and sets the first water level within a range where a certain amount of tank rotation water supply can be performed after the agitation water supply. It should be noted that the first water level and the first period are in a proportional relationship with each other, that is, if the first water level is set high, the first period becomes longer.

  By the way, when the first period has elapsed, as described above, it is considered that a certain amount of water has accumulated in the washing and dewatering tub 4. At this time, the laundry 20 in the water can move to some extent. Hereinafter, the movement of the laundry 20 in water is referred to as free movement of the laundry 20 for convenience. If free movement of the laundry 20 is possible, it is considered that water can also penetrate into the laundry 20 that was originally positioned below. On the other hand, as shown in FIG. 2 described above, for example, the light laundry 20a may float on water. And even if the laundry dewatering tub 4 rotates, the laundry 20a floating in the water may rotate when it is swung on the spot, and does not move to the lower part of the supply port and does not receive the supplied water. there is a possibility.

  Therefore, the washing machine 1 continues the water supply when the first period elapses, while stopping the rotation of the washing and dewatering tank 4 and operating the stirring blade 5 by a single rotation. In this way, when the stirring blade 5 is operated by single rotation, a certain amount of water is accumulated, and the underwater laundry 20 is freely moved by the water flow. An inward water flow as indicated by an arrow A, that is, a water flow that draws the laundry 20a floating in the water into the water is generated.

  As a result, the laundry 20a floating in the water is drawn into the water. That is, since it floats in water, water can be sufficiently infiltrated into the laundry 20a that may not have sufficiently infiltrated. Thus, the period during which the stirring blade 5 is operated by single rotation after the first period has elapsed corresponds to the second period.

  This second period is set in advance, for example, by performing tests on a plurality of types of clothing. Moreover, in this embodiment, the 2nd period is started from the time of less than half of a target water level. Thereby, compared with the case where it stores water to a target water level, the water of the state which the density | concentration of the detergent became relatively high can be made to osmose | permeate the laundry 20.

And when the 2nd period passes, the washing machine 1 will restart tank rotation water supply until it reaches a target water level. The period from when the second period elapses until the target water level is reached corresponds to the third period. When the water level reaches the target water level, the washing machine 1 starts the washing process.
Thus, the washing machine 1 of this embodiment performs a water supply stroke | process, without stopping water supply and controlling rotation of the washing dehydration tank 4 and the stirring blade 5. FIG.

According to the embodiment described above, the following effects can be obtained.
The washing machine 1 is a tank rotation water supply that supplies water while rotating the washing dehydration tank 4 and the stirring blade 5 integrally, and a stirring that supplies water while rotating the stirring blade 5 independently while stopping the rotation of the washing dehydration tank 4. It is configured to be feasible with water supply. And the washing machine 1 performs tank rotation water supply in the 1st period until it reaches a 1st water level in the water supply period which supplies water to a target water level. Thereby, first, since the laundry 20 rotates with the washing / dehydrating tub 4 at the beginning of water supply, the laundry 20 that has passed under the supply port is splashed with water.

  Now, as the water level rises, the relatively light laundry 20a floats in the water, and there is a possibility that water cannot sufficiently penetrate. Therefore, the washing machine 1 executes the agitation water supply in the second period from when the first period has elapsed until the second water level is reached. Thereby, a water flow is generated in the laundry dewatering tub 4 downward, and the laundry 20a floating in the water can be drawn into the water. That is, water can be sufficiently permeated into the laundry 20a floating in the water.

Thereafter, the washing machine 1 performs the tank rotation water supply in the third period from when the second period has elapsed until the target water level is reached. Thereby, the laundry 20 sink | submerged in water can be freely moved in the said water, and water can be penetrate | infiltrated more.
And the washing machine 1 is continuing water supply until it reaches | attains a target water level. For this reason, the time required to reach the target water level does not change from the case where the stirring water supply is not executed. In other words, even when the method of the embodiment is applied, the time required for the water supply stroke does not increase.

Therefore, the penetration of water into the laundry 20 can be promoted without increasing the time required for the washing operation.
Further, the washing machine 1 sets the first water level to a range of 1/3 to 2/3 or less of the target water level. Thereby, in the washing machine 1, a certain amount of water can be stored in the washing and dewatering tank 4 in the first period, that is, the period until the stirring water supply is started. Then, since the agitation water supply is started in a state where a certain amount of water has accumulated, when the agitation blade 5 is rotated, the laundry 20 can move freely in the water relatively freely, and the generation of water flow occurs. The facilitated pulling of the laundry 20a that floats is facilitated. Moreover, since the stirring blade 5 is rotated in a state where water has accumulated to some extent, the load on the driving unit 6 can be reduced.

In addition, the tank rotation water supply is executed in the third period until the target water level is reached after the agitation water supply is completed, that is, the laundry 20 is relatively submerged in the water while the laundry 20 is drawn into the water. Since it is rotated in a free state, further penetration of water into the laundry 20 can be promoted.
Further, the washing machine 1 includes a UFB generator 13 (microbubble-containing portion) that is provided in the water supply path 9 and contains fine bubbles in the water flowing through the water supply path 9, and is used for tank rotation water supply and stirring water supply. The fine bubble-containing water containing fine bubbles is supplied through the UFB generator 13. Thereby, the cleaning effect by the water containing fine bubbles is added, and the cleaning performance can be improved.

  Further, the washing machine 1 is provided with the UFB generator 13 on the upstream side of the detergent case 11, that is, the water that has passed through the detergent case 11 is supplied to the washing / dehydrating tank 4. In this embodiment, the detergent case 11 is provided in the water supply path 9, and the UFB generator 13 is provided on the upstream side of the detergent case 11 in the flow of water. Thereby, water in a state where the interface of the detergent is activated by the action of fine bubbles, that is, water in which the detergent is well dissolved can be supplied, and the cleaning performance can be improved.

(Second Embodiment)
Hereinafter, a second embodiment will be described with reference to FIG. In this second embodiment, several examples of expansion of the first embodiment will be described. In addition, since the structure of the washing machine 1 is common with 1st Embodiment, it demonstrates, also referring FIG.

<Extended example 1: Use of weight specific part>
In the case of the expansion example 1, the washing machine 1 includes a weight specifying unit such as a weight sensor 18 that specifies the weight of the laundry 20, and the bath is calculated based on the weight of the laundry 20 specified by the weight specifying unit. When the ratio is 9 or less, stirring water supply is executed.

  Here, the bath ratio is a value obtained as bath ratio = V ÷ G based on the weight (G) of the laundry 20 and the amount of water (V) with respect to the laundry 20 of the weight. The greater the weight, the smaller the bath ratio. More simply stated, the bath ratio is a value serving as an index of the load on the capacity of the washing machine 1. In other words, executing the agitation water supply when the bath ratio is 9 or less indicates that the agitation water supply is executed when the load of the washing operation is high. Note that the bath ratio is used even when the washing / dehydrating tub 4 has the same volume, and the rated load may change depending on the motor specifications and the like. Whether the load is simply high or low based on the weight of the laundry 20 This is because it is difficult to judge.

  The high load of the washing operation simply indicates that the amount of the laundry 20 is large, and there is a high possibility that the free movement of the laundry 20 is hindered. As a result, like the laundry 20a in FIG. 2 described above, there is a high possibility that the water will float before it penetrates. In addition, when the load of washing operation is low, since the laundry 20 is easy to move freely, it is thought that water can be permeated comparatively only by tank rotation water supply.

  Therefore, in the present embodiment, the agitation water supply is performed when the load of the washing operation is high. Thereby, when there is a high possibility that the laundry 20 will float, the floating laundry 20a can be drawn into the water. The same applies to the case where the weight of the laundry 20 is set not by the weight sensor 18 but by a user operation.

<Extended example 2: Use of temperature specifying unit>
In the case of the expansion example 2, the washing machine 1 includes a temperature specifying unit such as a temperature sensor 17 that specifies the temperature of the water flowing through the water supply path 9, and the temperature of the water specified by the temperature specifying unit is the temperature of the tap water. If higher, the first water level is set lower than when supplying tap water.

  When the temperature of water is high, it is considered that the detergent dissolves better than when the temperature is low. Therefore, even with a small amount of water, the water in which the detergent is dissolved can be efficiently infiltrated, and Since it is considered that the movement of the cloth is improved because there is little friction, it is considered that water can penetrate into the entire laundry 20.

  Therefore, the washing machine 1 sets the first water level relatively low when the temperature of the water is higher than the temperature of the tap water. In other words, water having a relatively high concentration of detergent is allowed to penetrate into the laundry 20. Accordingly, it is considered that the cleaning ability can be improved, such as reduction in washing unevenness. The same applies when the user specifies whether or not to use bath water and whether or not the temperature of the bath water to be used is higher than that of tap water.

<Extended example 3: Use of detergent specific part>
In the case of the expansion example 3, the washing machine 1 includes a detergent specifying unit that specifies whether the detergent put into the detergent case 11 is a liquid detergent or a powder detergent. When the type is a liquid detergent, the first water level is set lower than when the type of the detergent is a powder detergent. In this extended example, it is assumed that the user sets the type of detergent, that is, the operation panel 8 functions as a detergent specifying unit.

  It is considered that the powder detergent is more likely to remain undissolved than the liquid detergent. Therefore, when liquid detergent is used, even if the first water level is set lower than when powder detergent is used, it is assumed that the permeation degree is likely to be uniform and friction with the stirring blade 5 is reduced. Therefore, it is thought that the movement of the cloth is also improved. Therefore, even if the water level is low, the laundry 20 can be infiltrated with water.

<Extended example 4: Addition of extra process>
In the case of the expansion example 4, the washing machine 1 stops the rotation of the water supply and the washing / dehydrating tub 4 after the first period has passed, while the stirring blade 5 is rotated alone and continuously or intermittently. Execute every stroke. Specifically, as shown in FIG. 4, when the first period has elapsed, the washing machine 1 stops water supply and continuously rotates the stirring blade 5 alone and continuously, or the stirring blade 5 alone. And it controls by the intermittent rotation which rotates intermittently.

  This makes it easier for water to penetrate when the laundry 20 is put on. Thereafter, the washing machine 1 restarts water supply and performs single rotation (stir water supply) during the second period and integral rotation (tank rotation water supply) during the third period. In addition, since the water supply is stopped during the extra period, the total water supply period does not change. That is, even if the extra period is provided, the target water level can be obtained.

If the stirring blade 5 is rotated in a relatively dry state before the water has permeated, the laundry 20 moves well, and it is considered that water can be sprinkled evenly during water supply. And if water can be sprinkled evenly, improvement in cleaning performance can be expected.
In this case, in the intermittent rotation, the stirring blade 5 may be periodically rotated / stopped, or may be stopped after rotating for a preset period and waiting for the extra period to elapse. Good.

(Other embodiments)
In the embodiment, the washing machine 1 having no drying function is illustrated, but the present invention can also be applied to a washing machine having a drying function.
In the embodiment, as the washing machine 1, a so-called vertical washing machine in which the rotation axis of the washing / dehydrating tub 4 is in the vertical direction is illustrated, but the rotation axis of the washing / dehydrating tub 4 is inclined horizontally or slightly upward. The present invention can also be applied to a horizontal axis type drum-type washing machine.

  In the embodiment, an example in which the heater 16 and the temperature sensor 17 are provided in the water supply valve unit 10 has been described, but the positions and the number of the heaters 16 and the temperature sensors 17 are not limited thereto. Further, the heater 16 and the temperature sensor 17 may not be provided.

  Although the example which provided the detergent case 11 in the water supply path 9 was shown in embodiment, the detergent case 11 may be outside the water supply path 9. For example, the detergent case 11 is provided on the side wall of the washing / dehydrating tank 4, the detergent is once poured into the lower part of the water tank 3, and the water accumulated in the water tank in the water supply process is supplied into the washing / dehydrating tank 4 by rotational force. It may be a configuration. Even in such a configuration, the USB generator 13 is located upstream of the detergent case 11 in the flow of water, and supplies the detergent in a well-dissolved state in the washing and dewatering tub 4. Is possible.

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

  In the drawings, 1 is a washing machine, 2 is a main body, 3 is a water tank, 4 is a washing and dewatering tank, 5 is a stirring blade, 7 is a control unit, 8 is an operation panel (weight specifying unit, temperature specifying unit), and 9 is a water supply path. , 11 is a detergent case, 13 is a UFB generator (part containing fine bubbles), 17 is a temperature sensor (temperature specifying part), 18 is a weight sensor (weight specifying part), 19 is a water level sensor, and 20 and 20a are laundry items. Show.

Claims (8)

The body,
A water tank provided in the main body;
A laundry dewatering tank that is rotatably provided in the water tank and into which laundry is put,
A stirring blade provided in the laundry dewatering tub, rotating integrally with the laundry dewatering tub, and capable of independent rotation independent of the laundry dewatering tub;
A water supply path for supplying water into the laundry dewatering tank from above the laundry dewatering tank;
A water level sensor for detecting the water level of the washing and dewatering tank;
A controller that starts a washing process when the water level of the washing and dewatering tank detected by the water level sensor reaches a target water level,
The controller is configured to supply water while rotating the washing and dewatering tank and the stirring blade integrally, and to stop water from rotating while rotating the washing and dewatering tank, while stirring the water while rotating the stirring blade alone. In the water supply period in which water supply can be performed and water is supplied to the target water level, the tank rotation water supply is executed in the first period until the first water level is set in advance, and the first period has elapsed. The agitation water supply is executed in the second period from the time point until the preset second water level is reached, and in the third period until the target water level is reached after the second period has elapsed. A washing machine characterized by performing a rotating water supply.   The washing machine according to claim 1, wherein the control unit sets the first water level to a range of 2/3 or less of the target water level. It has a weight identification part that identifies the weight of the laundry,
3. The washing machine according to claim 1, wherein the control unit executes the agitation water supply when a bath ratio calculated based on a weight of the laundry specified by the weight specifying unit is 9 or less. 4. . Provided in the water supply path, comprising a fine bubble-containing part that contains fine bubbles in the water flowing through the water supply path,
4. The fine bubble-containing water containing fine bubbles is supplied through at least one of the tank rotation water supply and the stirring water supply through the fine bubble-containing portion. Washing machine.   5. The washing machine according to claim 4, wherein the fine bubble-containing part is provided on an upstream side of a detergent case that houses a detergent supplied into the washing and dewatering tub. A temperature specifying unit for specifying the temperature of water flowing through the water supply path;
The said control part sets said 1st water level lower than the case where tap water is supplied, when the temperature of the water specified by the said temperature specific | specification part is higher than the temperature of tap water, It is characterized by the above-mentioned. The washing machine according to any one of 1 to 5. A detergent specifying unit for specifying whether the detergent put into the detergent case containing the detergent supplied in the laundry dewatering tank is a liquid detergent or a powder detergent;
The control unit sets the first water level lower when the type of detergent put into the detergent case is liquid detergent than when the type of detergent is powder detergent. Item 7. The washing machine according to any one of Items 1 to 6.   After the first period has elapsed, the control unit stops the rotation of the water supply and the washing and dewatering tank, and performs a setting process of rotating the stirring blade independently and intermittently. The washing machine according to any one of claims 1 to 7, wherein

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