JP2023086041A - washing machine - Google Patents

Abstract

To provide a washing machine which can sufficiently acquire rinsing performance by a shower rinsing step, irrespective of a magnitude of a water supply flow rate or an amount of laundry.SOLUTION: A fully automatic washing machine 1 includes: a washing and dewatering tub 22 arranged rotatably in an outer tub 20; a drive unit 30 for driving the washing and dewatering tub 22; a water supply unit 50 for performing water supply in the washing and dewatering tub 22 from above the washing and dewatering tub 22; a drain valve 40 for opening/closing a drain port part 20a provided at a bottom part of the outer tub 20; a water level sensor for detecting a water level in the outer tub 20; and a control part for executing a shower rinsing step for performing water supply by the water supply unit 50 while rotating the washing and dewatering tub 22 by the drive unit 30. The control part performs water supply by the water supply unit 50 in the shower rinsing step, in a state where the drain valve 40 is closed, and stops the water supply by the water supply unit 50 on the basis of, the fact that the water level in the outer tub 20 has reached a water supply stop water level set beforehand.SELECTED DRAWING: Figure 1

Description

The present invention relates to washing machines.

Conventionally, a washing machine that performs a shower rinsing process is known. An example of such a washing machine is described in Patent Literature 1, for example.

In the shower rinsing process, the washing/drying tub rotates at a low speed and water is supplied from above the washing/drying tub. As a result, water is absorbed by the laundry in the washing/dehydrating tub. In the dehydration process following the shower rinsing process, the laundry is dehydrated when the washing/dehydration tub rotates at high speed, and the detergent contained in the laundry is discharged together with the water. The shower rinsing process, i.e. watering the laundry, is performed for a certain period of time.

JP-A-07-163783

The flow rate of water supply from the faucet to the washing machine may change depending on the usage of water supply at other locations in the house. As a result, the flow rate of water supply in the shower rinsing process may also change from time to time. Therefore, in the shower rinsing process, when water is supplied for a certain period of time, when the water supply flow rate is low, the entire laundry cannot absorb sufficient water, and it is difficult to obtain sufficient rinsing performance. There is a possibility that

In addition, when water is supplied for a certain period of time, even when the amount of laundry in the washing/dehydrating tub is large, the entire laundry cannot absorb the water sufficiently, resulting in insufficient rinsing performance. There is a risk that it will be difficult to obtain.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a washing machine in which sufficient rinsing performance can be easily obtained in the shower rinsing process regardless of the flow rate of water supply or the amount of laundry to be washed. .

A washing machine according to a main aspect of the present invention comprises an outer tub elastically supported in a housing, a washing/drying tub rotatably arranged in the outer tub, and a drive unit for driving the washing/drying tub. a water supply unit for supplying water from above the washing/drying tub to the inside of the washing/drying tub; a drain valve for opening and closing a drainage port provided at the bottom of the outer tub; and detecting the water level in the outer tub. and a controller for executing a shower rinsing process in which water is supplied from the water supply unit while rotating the washing/dehydrating tub by the driving unit. Here, in the shower rinsing step, the control unit performs water supply by the water supply unit while the drain valve is closed, and detects that the water level in the outer tank has reached a preset water supply stop water level. Based on this, the water supply by the water supply unit is stopped.

According to the above configuration, the water supply amount can be increased as the amount of laundry increases, and a constant water supply amount can be secured even if the water supply flow rate varies. As a result, regardless of the amount of laundry or the flow rate of water supply, the laundry in the washing/dehydrating tub can be sufficiently soaked with water, and a sufficient rinsing performance can be ensured.

In the washing machine according to this aspect, the water supply stop water level may be set to a water level lower than the water level at which the water stored in the outer tub contacts the bottom surface of the washing/extraction tub.

According to the above configuration, in the shower rinsing process, the water stored in the outer tub is less likely to come into contact with the bottom portion of the rotating washing/dehydrating tub. As a result, it is possible to prevent the rotation load of the washing/dehydrating tub from increasing due to contact with water.

In the above configuration, the controller continues from the shower rinsing step in the dehydration step following the shower rinsing step after a preset waiting time has elapsed from the end of the shower rinsing step. may be configured to initiate an increase in the number of rotations of the rotating washing/dehydrating tub.

With such a configuration, in the outer tub, drainage starts at a water supply stop water level that is lower than the position of the bottom of the washing and spinning tub, so even if the waiting time is set to be short, the rotation of the washing and spinning tub is When the number starts to rise, the water level in the outer tub becomes sufficiently low relative to the bottom of the washing/dehydrating tub. As a result, even if the water level in the outer tub rises temporarily, water is less likely to come into contact with the bottom surface of the rotating washing/dehydrating tub. Therefore, since the waiting time can be set short, it is possible to quickly start increasing the number of rotations of the washing/dehydrating tub to start dehydrating the laundry after the shower rinsing process is finished.

Moreover, since the standby time is still set, there is no need to excessively lower the water supply stop water level. Therefore, it is possible to avoid difficulty in detecting that the water level has reached the water supply stop water level by the water level detection unit.

Furthermore, since the number of revolutions of the washing/dehydrating tub is increased from the number of revolutions in the shower rinsing process, dehydration of the laundry can be started earlier.

According to the present invention, it is possible to provide a washing machine in which sufficient rinsing performance in the shower rinsing process can be easily obtained regardless of the flow rate of water supply or the amount of laundry.

The effects and significance of the present invention will become clearer from the description of the embodiments shown below. However, the following embodiment is merely an example of carrying out the present invention, and the present invention is not limited to the embodiments described below.

FIG. 1 is a side cross-sectional view of a fully automatic washing machine according to an embodiment. FIG. 2 is a block diagram showing the configuration of the fully automatic washing machine according to the embodiment. FIG. 3(a) is a flow chart showing control processing executed by the controller in the shower rinsing process according to the embodiment. FIG. 3(b) is a flow chart showing a control process executed by the controller in the intermediate dehydration process following the shower rinsing process according to the embodiment. FIGS. 4A and 4B are diagrams for explaining the shower rinsing process according to the embodiment.

A fully automatic washing machine 1, which is an embodiment of the washing machine of the present invention, will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a fully automatic washing machine 1. FIG.

The fully automatic washing machine 1 has a housing 10 that constitutes the exterior. The housing 10 includes a rectangular tubular body 11 with open upper and lower surfaces, a top plate 12 covering the upper surface of the body 11 , and a footrest 13 supporting the body 11 . A laundry inlet 14 is formed in the top plate 12 . The inlet 14 is covered with an openable and closable upper lid 15 .

In the housing 10, an outer tank 20 having an open top is elastically suspended and supported by four suspension rods 21 having a vibration isolator. The outer tub 20 has a substantially bottomed cylindrical shape and includes a bottom portion 201 and a peripheral portion 202 .

Inside the outer tub 20, a washing/dehydrating tub 22 having an open upper surface is arranged. The washing/dehydrating tub 22 rotates around a vertically extending rotating shaft. The washing/dehydrating tub 22 has a substantially cylindrical shape with a bottom, and includes a bottom portion 221 and a peripheral portion 222 . A predetermined gap is provided between the bottom surface portion 221 of the washing/drying tub 22 and the bottom portion 201 of the outer tub 20 and between the peripheral surface portion 222 of the washing/drying tub 22 and the peripheral surface portion 202 of the outer tub 20. .

A large number of dehydration holes 22a are formed along the entire circumference of the peripheral surface portion 222 of the washing/dehydration tub 22 . A balance ring 23 is provided above the washing/dehydrating tub 22 . A pulsator 24 is rotatably arranged at the bottom of the washing/dehydrating tub 22 . A plurality of blades 24a are radially provided on the surface of the pulsator 24 .

A driving unit 30 for generating torque for driving the washing/dehydrating tub 22 and the pulsator 24 is arranged at the outer bottom of the outer tub 20 . The drive unit 30 includes a drive motor 31 and a transmission mechanism section 32 . The transmission mechanism unit 32 has a clutch mechanism 32a, and the torque of the drive motor 31 is transmitted only to the pulsator 24 in the washing process, the water rinsing process, and the water rinsing process by switching operation by the clutch mechanism 32a. , and in the dehydration process and the shower-rinse process, the torque of the drive motor 31 is transmitted to the pulsator 24 and the washing/dehydration tub 22 to integrally rotate the pulsator 24 and the washing/dehydration tub 22 . The drive unit 30 corresponds to the drive section of the present invention.

An outer bottom portion of the outer tub 20 is formed with a drain port portion 20a. A drain valve 40 for opening and closing the drain port 20a is provided in the drain port 20a. The drain valve 40 is connected to the drain hose 41 . When the drain valve 40 is opened, the water stored in the washing/dehydrating tub 22 and the outer tub 20 is discharged out of the machine through the drain port 20a and the drain hose 41. As shown in FIG.

A water supply unit 50 for supplying tap water to the washing/dehydrating tub 22 is arranged at the rear of the top plate 12 . The water supply unit 50 has a water supply valve 51 . A water inlet 51a of the water supply valve 51 is connected to a tap via a water supply hose. When the water supply valve 51 is opened, tap water from the water tap flows through the water supply path 52 and is supplied from the water inlet 53 into the washing/dehydration tub 22 . The water injection port 53 is directed substantially downward, and the water discharged from the water injection port 53 drops near the middle position between the center of the washing/dehydrating tub 22 and the peripheral surface portion 222 . The water inlet 53 may have a wide mouth extending along the circumferential direction of the washing/dehydrating tub 22 . The water supply unit 50 corresponds to the water supply section of the present invention.

FIG. 2 is a block diagram showing the configuration of the fully automatic washing machine 1. As shown in FIG.

The fully automatic washing machine 1 includes an operation unit 61 and a water level sensor 62 in addition to the above configuration. The fully automatic washing machine 1 also includes a control unit 100 . Control unit 100 includes control section 101 , storage section 102 , motor drive section 103 , clutch drive section 104 , water supply drive section 105 and water discharge drive section 106 .

The operation unit 61 includes a power button for turning on and off the power of the fully automatic washing machine 1, a start/pause button for starting and pausing the operation, and a plurality of operation courses related to the washing operation. It includes various operation buttons such as a course selection button for selecting a driving course. The operation unit 61 outputs an input signal to the control unit 101 according to the operation button operated by the user.

The water level sensor 62 detects the water level inside the washing/dehydrating tub 22 , that is, inside the outer tub 20 , and outputs a water level signal corresponding to the detected water level to the control section 101 . In this embodiment, the water level sensor 62 can detect the water supply stop water level in the outer tub 20 , which is lower than the bottom surface portion 221 of the washing/dehydrating tub 22 . The water supply stop water level is set in advance and used for control in the shower rinsing process. The water level sensor 62 corresponds to the water level detector of the present invention.

The water level sensor 62 can be composed of, for example, a diaphragm-type pressure sensor. In this case, the pressure sensor is connected via a hose to an air trap provided at the bottom of the outer tank 20, and detects the air pressure inside the air trap that changes according to the water level. The performance of the pressure sensor and the location of the air trap are determined so that the water supply stop water level can be detected.

The motor drive section 103 drives the drive motor 31 according to the control signal output from the control section 101 . The motor drive unit 103 includes a rotation sensor for detecting the rotation speed of the drive motor 31, an inverter circuit, and the like, and adjusts drive power so that the drive motor 31 rotates at the rotation speed set by the control unit 101.

The clutch drive section 104 drives the clutch mechanism 32 a of the transmission mechanism section 32 according to the control signal output from the control section 101 . The water supply drive unit 105 drives the water supply valve 51 according to the control signal from the control unit 101 . The drainage driving section 106 drives the drainage valve 40 according to the control signal from the control section 101 .

Storage unit 102 includes EEPROM, RAM, and the like. The storage unit 102 stores programs for executing washing operations of various operation courses. The storage unit 102 also stores various operating conditions used for the washing operation.

The control unit 101 includes a CPU and the like, and controls the motor drive unit 103, the clutch drive unit 104, the water supply drive unit 105, the water discharge drive unit 106, etc. according to the programs stored in the storage unit 102. FIG.

In the fully automatic washing machine 1, under the control of the control unit 101, washing operations of various operation courses are performed. In the washing operation, a washing process, an intermediate dehydration process, a rinsing process and a final dehydration process are performed in order.

In the washing process and the rinsing process, the pulsator 24 rotates forward and backward while water containing detergent is stored in the washing/dehydrating tub 22 . The rotation of the pulsator 24 generates a water flow in the washing/dehydrating tub 22, and the laundry is washed by the water flow and the detergent.

As the rinsing process, a water rinsing process, a water injection rinsing process, or a shower rinsing process is selectively executed according to the operation course or user's setting. The rinsing step may be performed twice with an intermediate dewatering step interposed. In this case, a shower rinse step is often performed as the first rinse step.

In the accumulating and rinsing process and the water pouring and rinsing process, the pulsator 24 rotates forward and reverse while water is stored in the washing/dehydration tub 22 to generate water flow in the washing/dehydration tub 22 . The laundry is rinsed by the generated water flow, and the detergent contained in the laundry is discharged into the water. In the water injection and rinsing step, the water supply is continued even when the pulsator 24 is rotating, and water containing the detergent is discharged from an overflow port (not shown) provided in the upper portion of the outer tub 20 .

In the shower rinsing process, water is supplied into the washing/dehydration tub 22 while the washing/dehydration tub 22 rotates at a low speed integrally with the pulsator 24 . Water is applied to the laundry, and the laundry absorbs the water. At this time, the drain valve 40 is closed, and water that has not been absorbed by the laundry accumulates at the bottom of the outer tub 20, that is, at a portion lower than the bottom surface 221 of the washing/dehydrating tub 22. In the subsequent intermediate dehydration step, the detergent contained in the laundry is discharged together with the water. Note that the dehydration and rinsing process may include the shower rinsing process and the intermediate dehydration process.

In the intermediate dehydration process and the final dehydration process, the washing/dehydration tub 22 and the pulsator 24 are integrally rotated at a predetermined dehydration rotation speed. The laundry is dehydrated by the action of the centrifugal force generated in the washing/dehydrating tub 22 .

Next, the shower rinsing process and the intermediate dehydration process following the shower rinsing process will be described in detail.

FIG. 3A is a flow chart showing control processing executed by the control unit 101 in the shower rinsing process. FIG. 3(b) is a flow chart showing the control process executed by the controller 101 in the intermediate dehydration process following the shower rinsing process. FIGS. 4A and 4B are diagrams for explaining the shower rinsing process. FIG. 4(a) shows the state of the shower rinsing process when a large amount of laundry is stored in the washing/dehydrating tub 22, and FIG. Shows the shower rinsing process when housed.

Referring to FIG. 3(a), when the shower rinsing process is started, control unit 101 closes drain valve 40 (S101). In the intermediate dehydration process performed before the shower rinsing process, the drain valve 40 is opened to drain water from the outer tub 20 .

Next, the control unit 101 starts the drive motor 31 to start low speed rotation of the washing/dehydrating tub 22 (S102). At this time, the pulsator 24 rotates integrally with the washing/dehydrating tub 22 . The rotation speed of the washing/drying tub 22 at this time is, for example, about 30 rpm, which is lower than the so-called horizontal resonance point rotation speed at which the washing/drying tub 22 and the outer tub 20 vibrate greatly in the horizontal direction due to resonance.

Further, the control unit 101 opens the water supply valve 51 to start supplying water to the washing/dehydration tub 22 (S103). The rotation of the washing/drying tub 22 and water supply may be started at the same time, or the water supply may be started prior to the rotation of the washing/drying tub 22 .

As shown in FIGS. 4(a) and 4(b), the water discharged from the water injection port 53 is sprinkled on the laundry that has turned around just below the water injection port 53 due to the rotation of the washing/dehydration tub 22, and the laundry is dropped. The applied water is absorbed by the laundry. Water that is not absorbed by the laundry and water containing detergent that is removed from the laundry after absorption is discharged from the washing/dehydrating tub 22 and accumulated in the bottom of the outer tub 20 . As a result, the water level in the outer tub 20 rises.

The control unit 101 detects the water level in the outer tank 20 with the water level sensor 62, and monitors whether or not the water level has reached a preset water supply stop water level (S104). As shown in FIGS. 4A and 4B, the water supply stop water level is set lower than the water level at which the water stored in the outer tub 20 contacts the bottom surface 221 of the washing/dehydrating tub 22 .

When the water level in the outer tub 20 reaches the water supply stop water level (S104: YES), the control unit 101 closes the water supply valve 51 to stop water supply (S105). Then, the controller 101 closes the drain valve 40 (S106). Thereby, the drainage from the inside of the outer tub 20 is started. Thus, the shower rinsing process ends.

When there is a large amount of laundry in the washing/dehydrating tub 22 as shown in FIG. Since the amount of water increases and it becomes difficult to discharge water into the outer tub 20, the water level in the outer tub 20 rises slowly. Therefore, the larger the amount of laundry, the larger the amount of water supplied until the water level in the outer tub 20 reaches the water supply stop water level. As a result, the entire laundry in the washing/dehydrating tub 22 can be sufficiently soaked with water regardless of the size of the laundry.

Even if the flow rate of water supply varies, when the amount of laundry is approximately the same, the amount of water supply until the water level in the outer tub 20 reaches the water supply stop water level is approximately the same. As a result, the entire laundry in the washing/dehydrating tub 22 can be sufficiently soaked with water regardless of the magnitude of the water supply flow rate.

Furthermore, since the water stored in the outer tub 20 does not come into contact with the bottom portion 221 of the rotating washing/drying tub 22, it is possible to prevent the rotation load of the washing/drying tub 22 from increasing due to contact with water.

After the shower rinsing process is finished, the intermediate dehydration process is started.

Referring to FIG. 3B, control unit 101 monitors whether or not a preset waiting time has elapsed since the shower rinsing process was completed, that is, the drainage valve 40 was opened (S201). The waiting time is set to, for example, several seconds. While the standby time elapses, the water level in the outer tank 20 is lowered.

When the standby time has passed (S201: YES), the control unit 101 increases the rotation speed of the drive motor 31, and directs the rotation speed of the washing/dehydration tub 22 to a preset dehydration rotation speed (for example, 800 rpm). Raise (S202). In the process of increasing the rotation speed, a constant speed period in which the rotation speed is kept constant can be provided as appropriate.

When the number of revolutions of the washing/dehydrating tub 22 increases, the water contained in the laundry is easily discharged. Thereby, when the amount of water discharged from the laundry is large, the amount of water discharged temporarily exceeds the amount of water discharged from the outer tub 20, and the water level in the outer tub 20 may rise temporarily. In this embodiment, the water supply stop water level is set to a water level lower than the position of the bottom portion 221 of the washing/dehydrating tub 22 . Therefore, even if the standby time is set to be short, the water level in the outer tub 20 when the rotation speed of the washing/dehydration tub 22 starts to rise is sufficiently low relative to the bottom surface 221 of the washing/dehydration tub 22. When a temporary rise in the water level in 20 occurs, it becomes difficult for water to come into contact with the bottom part 221 of the rotating washing/dehydration tub 22, so contact with water increases the rotation load of the washing/dehydration tub 22, It is difficult to generate a loud sound due to waves or the like. Therefore, since the waiting time can be set short, it is possible to quickly start increasing the rotation speed of the washing/dehydrating tub 22 to start dehydrating the laundry after the shower rinsing process is completed. Moreover, since the standby time is still set, it is not necessary to excessively lower the water supply stop water level in order to avoid water contact with the washing/dehydrating tub 22 . Therefore, it is possible to avoid difficulty in detecting that the water level reaches the water supply stop water level by the water level sensor 62 .

When the rotation speed of the washing/drying tub 22 reaches the spin-drying speed (S203: YES), the controller 101 maintains the spin-drying speed (S204). Then, when the preset dehydration time has elapsed (S205: YES), the control section 101 stops the drive motor 31 to stop the rotation of the washing/dehydrating tub 22 (S206). Thus, the intermediate dehydration step is completed.

By dehydrating the laundry in the intermediate dehydration step, the detergent is discharged from the laundry together with the water absorbed in the shower rinsing step, and the laundry is rinsed. In the shower rinsing step, the laundry is also rinsed by the water containing the detergent being removed from the laundry by successively pouring water from above.

<Effect of Embodiment>
As described above, according to the present embodiment, in the shower rinsing process, water is supplied by the water supply unit 50 with the drain valve 40 closed, and the water level in the outer tub 20 reaches the preset water supply stop water level. Water supply is stopped based on As a result, the amount of water supply can be increased as the amount of laundry increases, and a constant amount of water supply can be ensured even if the flow rate of water supply varies. As a result, regardless of the amount of laundry or the flow rate of water supply, the laundry in the washing/dehydrating tub 22 can be sufficiently soaked with water, and sufficient rinsing performance can be ensured.

Furthermore, according to the present embodiment, since the water supply stop water level is set to a water level lower than the water level at which the water stored in the outer tub 20 contacts the bottom surface portion 221 of the washing/dehydrating tub 22, shower rinsing is performed. In the process, the water stored in the outer tub 20 is less likely to come into contact with the bottom portion 221 of the rotating washing/dehydrating tub 22 . As a result, it is possible to prevent the rotation load of the washing/dehydrating tub 22 from increasing due to contact with water.

Furthermore, according to the present embodiment, in the outer tub 20, since the water supply stop water level is lower than the position of the bottom surface portion 221 of the washing/extraction tub 22, the water is discharged from the washing/extraction tub 22 after the shower rinsing process. Even if the waiting time until the rotation speed of the washing/drying tub 22 starts to rise is set to be short, the water level in the outer tub 20 when the rotation speed of the washing/drying tub 22 starts to rise is lower than the bottom portion 221 of the washing/drying tub 22. low enough. As a result, even if the water level in the outer tub 20 rises temporarily, the water is less likely to come into contact with the bottom portion 221 of the rotating washing/dehydrating tub 22 . Therefore, since the waiting time can be set short, it is possible to quickly start increasing the rotational speed of the washing/dehydrating tub 22 and start dehydrating the laundry after the shower rinsing process is completed.

Moreover, since the standby time is still set, there is no need to excessively lower the water supply stop water level. Therefore, it is possible to avoid difficulty in detecting that the water level reaches the water supply stop water level by the water level sensor 62 .

Furthermore, according to the above-described embodiment, in the intermediate dehydration step following the shower rinsing step, the rotation speed of the washing/dehydration tub 22 is increased from that in the shower rinsing step, so that the laundry can be dehydrated more effectively. It is possible to start early.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and the embodiments of the present invention can be modified in various ways other than those described above. .

For example, in the above embodiment, the water supply stop water level is set to a water level lower than the water level at which the water stored in the outer tub 20 contacts the bottom surface portion 221 of the washing/dehydrating tub 22 . However, the water supply stop water level may be set to a water level equal to or higher than the water level at which the water stored in the outer tub 20 contacts the bottom portion 221 of the washing/dehydrating tub 22 .

Furthermore, in the above embodiment, the water level sensor 62 is configured to detect the water level by detecting a change in water pressure, for example. However, a water level sensor having another configuration may be used to detect the water level within the outer tub 20 . For example, a water level sensor composed of a pair of electrodes may be arranged at the bottom of the outer tub 20 . In this case, when the water level in the outer tub 20 reaches the water supply stop water level, the pair of electrodes are energized by the water interposed therebetween, and the water level sensor outputs a detection signal indicating that the water supply stop water level has been reached. output to

Furthermore, in the above-described embodiment, the rotation speed of the washing/dehydrating tub 22 is started to increase after the standby time has elapsed from the end of the shower-rinsing process. However, the standby time may not be set, and the rotation speed of the washing/dehydrating tub 22 may be started to increase immediately after the shower rinsing process is completed.

Furthermore, in the above-described embodiment, the washing/dehydrating tub 22 continues to rotate even after the shower rinsing process is finished. However, the rotation of the washing/dehydrating tub 22 may be stopped when the shower rinsing process is finished. In this case, in the intermediate dehydration step, the washing/dehydration tub 22 starts rotating from a stopped state, and the number of revolutions increases.

Furthermore, in the above-described embodiment, the water supply unit 50 is not provided with a detergent container in which detergent is stored in advance. However, the water supply unit 50 may be provided with a detergent container. In this case, water coming out of the detergent container is directed to the water inlet 53 .

Furthermore, in the above embodiment, an example in which the present invention is applied to the fully automatic washing machine 1 is shown. However, the present invention can also be applied to a fully automatic washing and drying machine equipped with a clothes drying function.

In addition, the embodiments of the present invention can be appropriately modified in various ways within the scope of the technical idea indicated in the scope of claims.

1 fully automatic washing machine (washing machine)
10 housing
20 outer tank
20a drain port
22 Washing and dehydrating tank
30 drive unit (drive part)
40 drain valve
50 water supply unit (water supply unit)
62 Water level sensor (water level detector)
101 control unit
221 bottom part

Claims (3)

an outer tank elastically supported in the housing;
a washing/dehydrating tub rotatably arranged in the outer tub;
a driving unit for driving the washing/dehydrating tub;
a water supply unit for supplying water from above the washing and dehydration tub into the washing and dehydration tub;
a drain valve for opening and closing a drain port provided at the bottom of the outer tank;
a water level detector that detects the water level in the outer tank;
a control unit for executing a shower rinsing step of supplying water from the water supply unit while rotating the washing/dehydrating tub by the driving unit;
The control unit, in the shower rinsing step,
Water is supplied by the water supply unit in a state where the drain valve is closed,
stopping water supply by the water supply unit when the water level in the outer tank reaches a preset water supply stop water level;
A washing machine characterized by: In the washing machine according to claim 1,
The water supply stop water level is set to a water level lower than the water level at which the water stored in the outer tub contacts the bottom surface of the washing/dehydrating tub.
A washing machine characterized by: In the washing machine according to claim 2,
The control unit, in the dehydration step following the shower rinsing step,
After a preset waiting time has passed since the end of the shower rinsing process, the number of revolutions of the washing/dehydrating tub, which continues to rotate from the shower rinsing process, starts to increase.
A washing machine characterized by:

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