WO2022213800A1

WO2022213800A1 - Drum washing machine

Info

Publication number: WO2022213800A1
Application number: PCT/CN2022/082044
Authority: WO
Inventors: 松下丈也
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社; 海尔智家股份有限公司
Priority date: 2021-04-08
Filing date: 2022-03-21
Publication date: 2022-10-13
Also published as: JP2022161288A

Abstract

A drum washing machine achieving a squeezing washing effect of enabling detergent water to infiltrate a cushion or squeezing the cushion. The drum washing machine refers to a drum washing machine (1) capable of performing a washing process and a rinsing process, and is provided with: an outer tub (3) arranged in a box body (2); a drum (4) configured in the outer tub (3) and capable of rotating around a horizontal axis; a driving motor (11) used for rotating the drum (4) in a specified direction; and a control unit (50) for controlling the driving motor (11), wherein the control unit controls the driving motor (11) to rotate respectively at a high speed and a low speed during a washing process and a rinsing process, high-speed rotation refers to the drum rotating at a speed greater than a specified rotational speed, and low-speed rotation refers to the drum rotating at a speed lower than the specified rotational speed.

Description

drum washing machine

technical field

The invention relates to a drum washing machine.

Background technique

In the case of washing the laundry in a drum washing machine, after the laundry is put into the drum, the operation is usually performed in the order of a washing process, a rinsing process, and a spin-drying process. In the washing process and the rinsing process, a water supply operation for supplying water to the drum, a washing operation for rotating the drum, and a drainage operation for draining water from the drum are performed in this order, and then the dehydration operation is performed.

During the cleaning operation, the horizontal axis drum is rotated in the outer drum with water stored at the bottom, and the laundry is lifted and dropped by the lifting ribs provided in the drum, and the laundry is dropped to the inner peripheral surface of the drum. This washes laundry (for example, Patent Document 1).

Conventionally, in front-loading washing machines, in addition to laundry such as clothes, mattresses are sometimes washed. Also in this case, the operation is performed in the order of the washing process, the rinsing process, and the spin-drying process after the mattress is put into the drum similarly to the laundry such as clothes.

However, in the case of washing the mattress in a drum washing machine, if the mattress is directly thrown into the washing machine and washed normally, the mattress may be in a state of being biased in one direction in the drum and cannot be dehydrated, or the mattress itself may be damaged by the falling and washing. Out of shape. Therefore, when washing a mattress in a normal washing mode, a washing method in which the mattress is put into a washing machine after being bundled with a string or the like so that the mattress cannot move easily is conceivable. However, in this aspect, since the mattress is in a bundled state, it is difficult for water to penetrate to the inner side compared to the outer side of the mattress, and it is difficult to obtain a sufficient cleaning effect.

In addition, in the washing machine provided with the mattress-only mode, the following cleaning method is considered: the mattress is not tied with a rope, but the mattress is installed evenly along the inner wall of the drum, and the operation is started to end. The drum always rotates continuously along a fixed direction at a fixed rotation speed or above, so that the mattress can remain attached to the inner wall of the drum. However, in order to keep the mattress adhered to the inner wall of the drum, the drum needs to be rotated at a higher speed than during normal washing. Therefore, the water in the drum is squeezed out of the drum due to centrifugal force, and it is difficult to obtain a sufficient cleaning effect.

prior art literature

Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2018-33512

SUMMARY OF THE INVENTION

The problem to be solved by the invention

Therefore, an object of the present invention is to provide a front-loading washing machine that can sufficiently wash a mattress without uneven washing, for example.

solution to the problem

The front-loading washing machine of the present invention can perform the cleaning process and the rinsing process, and is characterized in that it has: an outer cylinder, which is arranged in the box; a driving motor for rotating the drum in a predetermined direction; and a control unit for controlling the driving motor, the control unit controlling the driving motor in at least one of the washing process and the rinsing process The high-speed rotation means that the drum rotates at a rotation speed greater than a predetermined rotation speed, and the low-speed rotation means that the drum rotates at a rotation speed below the predetermined rotation speed.

In the front-loading washing machine of the present invention, preferably, the control unit controls the drive motor to alternately switch the high-speed rotation and the low-speed rotation in at least one of the washing process and the rinsing process.

In the front-loading washing machine of the present invention, preferably, the control unit controls the drive motor to alternately switch the high-speed rotation and the low-speed rotation during the washing process and to alternately switch between the high-speed rotation and the low-speed rotation during the rinsing process. For the high-speed rotation and the low-speed rotation, the cycle of switching the rotation speed in the cleaning process is different from the cycle of switching the rotation speed in the rinsing process.

In the drum washing machine of the present invention, preferably, the cycle of switching the rotational speed during the rinsing process is shorter than the cycle of switching the rotational speed during the cleaning process.

In the front-loading washing machine of the present invention, preferably, the control unit controls the drive motor such that the low-speed rotation is performed for a longer period of time than the high-speed rotation during the washing process.

Invention effect

In the drum washing machine of the present invention, in at least one of the washing process and the rinsing process, the drum can be switched to two or more different rotation speeds. Therefore, when rotating at a high speed, the detergent water in the drum is squeezed out by the centrifugal force when the drum rotates, slightly dewatering from the mattress, and when rotating at a low speed, the centrifugal force when the drum rotates is small, and detergent is stored in the drum water, the mattress is immersed in detergent water. Therefore, the squeezing cleaning effect of infiltrating the detergent water into the mattress or squeezing the mattress can be obtained, the cleaning power is improved, and the unevenness of cleaning is suppressed.

In the front-loading washing machine of the present invention, high-speed rotation and low-speed rotation are alternately performed in at least one of the washing process and the rinsing process. Therefore, the squeezing cleaning effect of permeating the detergent water to the mattress or squeezing the mattress can be obtained more effectively.

In the drum washing machine of the present invention, the rotation speed at the time of high-speed rotation and the time of low-speed rotation can be set one by one in the washing process and the rinsing process. Therefore, it is possible to vary the intensity of the squeeze wash during the washing process and the rinsing process, for example, a gentle squeeze washing can be performed during the washing process to allow detergent water to penetrate and a strong squeeze washing can be performed during the rinsing process to wring out the mattress detergent water inside.

In the drum washing machine of the present invention, the cycle of switching between high-speed rotation and low-speed rotation in the rinsing process is set to be shorter than the cycle of switching between high-speed rotation and low-speed rotation in the cleaning process, which can increase the number of squeezing cleaning. Therefore, the rinsing effect can be improved by increasing the number of times the rinsing water passes through the mattress.

In the drum washing machine of the present invention, the time during low-speed rotation is set to be longer than the time during high-speed rotation during the cleaning process, so that the time of immersion in detergent water can be extended. Therefore, the detergent water can pass through the mattress, and the detergent water can be sufficiently permeated into the interior of the mattress, thereby improving the cleaning effect.

Description of drawings

FIG. 1 is a perspective view of a drum washing machine 1 according to an embodiment of the present invention.

FIG. 2 is a side cross-sectional view showing the configuration of the drum washing machine 1 of FIG. 1 .

FIG. 3 is a control block diagram of the drum washing machine 1 .

FIG. 4 is a flowchart showing the operation of the cleaning process in the mattress cleaning mode.

In FIG. 5, (a) is a figure which shows the rotation speed change of the drum 4 in a washing process, (b) is a figure which shows the rotation speed change of the drum 4 in a rinsing process.

In FIG. 6, (a) is a figure which shows the state of the mattress in the drum 4 at the time of low-speed rotation, (b) is a figure which shows the state of the mattress in the drum 4 at the time of high-speed rotation.

Description of reference numerals

1: drum washing machine; 2: box body; 3: outer tub; 4: drum; 11: driving motor; 50: control part (control unit).

Detailed ways

Hereinafter, the front-loading washing machine 1 as an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a drum washing machine 1 according to an embodiment of the present invention. FIG. 2 is a side cross-sectional view showing the configuration of the drum washing machine 1 of FIG. 1 .

As shown in FIGS. 1 and 2 , the front-loading washing machine 1 of the present embodiment has a box-shaped casing 2 , and an outer tub 3 having a substantially cylindrical inner peripheral surface is arranged inside the casing 2 . Inside, a drum 4 having a substantially cylindrical inner peripheral surface for accommodating laundry is pivotally supported by a main shaft 5 extending in the front-rear direction. The drum 4 can rotate around the horizontal axis.

On the front surface of the case 2, an operation part 2a is formed for the user to operate; The box 2 is provided with a door 8 for opening and closing the laundry inlet 6 . The laundry inlet 6 is opened and closed by the door 8 , and the laundry can be taken out and put into the drum 4 when the door 8 is open.

On the inner peripheral surface of the drum 4 , a plurality of lifting ribs 4 b are provided so as to protrude in the drum 4 . The lifting rib 4b is a protrusion for lifting up the laundry accommodated in the drum 4. For example, during the washing process, when the drum 4 is rotated by the driving force of the driving motor 11 described later, the water content in the drum 4 is increased. The laundry is lifted up by the lifting rib 4b and naturally falls so-called drop washing.

A number of water passage holes 4c are provided through the inner peripheral surface of the drum 4. The water supplied into the outer cylinder 3 during cleaning and rinsing flows into the drum 4 through the water passage holes 4c, and is discharged from the laundry in the drum 4 during centrifugal dehydration. The water that passes through the water passage hole 4c splashes toward the outer cylinder 3 side.

The main shaft 5 is rotatably supported by a bearing 5 a attached to the rear wall of the outer cylinder 3 , and a main pulley 10 is attached to the distal end of the main shaft 5 protruding further rearward. A drive motor 11 is provided at the bottom of the casing 2 , and a motor pulley 12 is mounted on the rotating shaft of the drive motor 11 . The torque of the motor pulley 12 is transmitted to the main pulley 10 via the timing belt 16 . Thereby, when the drive motor 11 is driven, the drum 4 rotates around the main shaft 5 .

A water supply pipe 30 provided with a water supply valve 30a in the middle is connected to the upper part of the rear wall of the outer cylinder 3 . When the water supply valve 30a is opened, water supplied from the outside is supplied to the outer cylinder 3 through the water supply pipe 30 . A drain pipe 31 provided with a drain valve 31a in the middle is connected to the drain port provided at the bottom of the outer cylinder 3. When the drain valve 31a is opened, the water in the outer cylinder 3 is discharged to the outside of the machine through the drain pipe 31.

FIG. 3 is a control block diagram of the drum washing machine 1 . As shown in FIG. 3 , the control unit 50 of the front-loading washing machine 1 is constituted by, for example, a microcomputer or the like, and includes: a CPU (Central Processing Unit); a ROM (Read Only Memory) storing a program for controlling the operation of the front-loading washing machine 1; and a RAM ( random access memory), which temporarily stores data, etc., used when executing the above-mentioned programs. The operation of the drum washing machine 1 is controlled by the control unit 50 . The control part 50 is connected with the operation part 2a, the water supply valve 30a, the drain valve 31a, and the drive motor 11.

In the front-loading washing machine 1 , the user can select the standard washing mode and the mattress washing mode by operating the operation part 2 a of the cabinet 2 . In addition, although various operation modes can be selected by operating the operation part 2a of the case 2 in the front-loading washing machine 1, in the following description, only the mattress washing mode is demonstrated.

The mattress washing mode is a mode used when washing the mattress, and the operation is performed in the order of the washing process, the rinsing process, and the dehydration process.

Based on FIG. 4 , the cleaning process of the mattress cleaning mode will be described. FIG. 4 is a flowchart showing the operation of the cleaning process in the mattress cleaning mode.

In step S1, the control part 50 rotates the drum 4 at a low speed. In the present embodiment, the control unit 50 controls the drive motor 11 to rotate the drum 4 at a low speed at the rotational speed N1 (for example, 60 rpm). Then, it progresses to step S2.

In step S2 , the control unit 50 opens the water supply valve 30 a to supply water to the outer tub 3 . At this time, the control part 50 closes the drain valve 31a, and the supplied water is stored in the outer cylinder 3, and also stored in the drum 4 through the water passage hole 4c.

In step S3, the control part 50 repeatedly determines whether the water level in the outer cylinder 3 has reached the set water level of a washing|cleaning process. And when the control part 50 determines that the water level in the outer cylinder 3 has reached the set water level, the control part 50 closes the water supply valve 30a, and progresses to step S4.

In step S4, the control part 50 determines whether the drum 4 is rotating at a low speed. When the control part 50 determines that the drum 4 is rotating at a low speed, it progresses to step S5. When the control part 50 determines that the drum 4 is not rotating at a low speed, it progresses to step S7.

In step S5, the control part 50 determines whether predetermined time T1 has passed since the drum 4 started rotating at a low speed. In the present embodiment, the predetermined time T1 is, for example, 60 sec. When the control unit 50 determines that the predetermined time T1 has elapsed after the drum 4 starts to rotate at a low speed, the process proceeds to step S6. When the control part 50 determines that the predetermined time T1 has not elapsed since the drum 4 started rotating at a low speed, it progresses to step S9.

In step S6 , since the low-speed rotation of the drum 4 continues for the predetermined time T1 , the control unit 50 starts the high-speed rotation of the drum 4 . In the present embodiment, the control unit 50 controls the drive motor 11 to rotate the drum 4 at a high speed at the rotational speed N2 (eg, 80 rpm). Then, it progresses to step S9.

In step S7, the control part 50 determines whether predetermined time T2 has passed since the drum 4 started high-speed rotation. In the present embodiment, the predetermined time T2 is, for example, 30 sec. When the control part 50 determines that predetermined time T2 has passed since the drum 4 started high-speed rotation, it progresses to step S8. When the control part 50 determines that the predetermined time T2 has not elapsed since the drum 4 started high-speed rotation, it progresses to step S9.

In step S8, since the high-speed rotation of the drum 4 continues for the predetermined time T2, the control unit 50 starts the low-speed rotation of the drum 4. Then, it progresses to step S9.

In step S9, the control part 50 determines whether the cleaning process is complete|finished. In the present embodiment, the required time for the cleaning process is preset, and when the required time elapses after the low-speed rotation of the drum 4 is started in step S1, the cleaning process ends. When the control unit 50 determines that the cleaning process has ended, the process proceeds to step S10. When the control part 50 determines that the cleaning process is not completed, it progresses to step S4.

In step S10, since the cleaning process has ended, the control unit 50 opens the drain valve 31a, drains the washing water in the outer tub 3 to the outside of the machine via the drain pipe 31, and ends the process.

FIG. 5( a ) shows a change in the rotational speed of the drum 4 in the above-described cleaning process. When the cleaning process starts, the low-speed rotation of the drum 4 is started. That is, in the present embodiment, the low-speed rotation in which the drum 4 is rotated at the rotational speed N1 (for example, 60 rpm) continues for a predetermined time T1 (for example, 60 sec). When the low-speed rotation of the drum 4 continues for the predetermined time T1, it is switched to the high-speed rotation of the drum 4 . That is, in the present embodiment, the high-speed rotation of the drum 4 at the rotational speed N2 (for example, 80 rpm) continues for a predetermined time T2 (for example, 30 sec). After the high-speed rotation of the drum 4 continues for a predetermined time T2, the same low-speed rotation and high-speed rotation as described above are alternately repeated until the time required for the cleaning process elapses.

It should be noted that, in the operation of the rinsing process in the mattress washing mode, the low-speed rotation and the high-speed rotation of the drum 4 are alternately repeated similarly to the operation in the above-described washing process.

The difference between the washing process and the rinsing process is the rotation speed of the drum when the drum 4 is rotated at a low speed and at a high speed, and the predetermined time during which the rotation continues. That is, in the cleaning process, low-speed rotation at the drum rotation speed N1 for a predetermined time T1 and high-speed rotation at the drum rotation speed N2 for a predetermined time T2 are alternately repeated, while in the rinsing process, the drum rotation speed N3 is alternately repeated. Low-speed rotation for a predetermined time T3 and high-speed rotation for a predetermined time T4 at the drum rotational speed N4.

Therefore, in the flowchart showing the operation of the cleaning process in FIG. 4 , instead of determining whether or not the predetermined time T1 has elapsed, it is determined whether or not the predetermined time T3 has elapsed in step S5, and whether or not the predetermined time T1 has elapsed is determined in step S7. Instead of judging whether or not the predetermined time T2 has elapsed, it is judged that the predetermined time T4 has elapsed, and it becomes a flowchart showing the operation of the rinsing process. It should be noted that, in step S9, when it is determined whether or not the rinsing process has ended, a preset required time for the rinsing process is used.

(b) of FIG. 5 shows the rotation speed change of the drum 4 in the rinsing process. When the rinsing process starts, the low-speed rotation of the drum 4 starts. That is, in the present embodiment, the low-speed rotation in which the drum 4 is rotated at the rotational speed N3 (for example, 60 rpm) continues for a predetermined time T3 (for example, 60 sec). When the low-speed rotation of the drum 4 continues for the predetermined time T3, it is switched to the high-speed rotation of the drum 4 . That is, in the present embodiment, the high-speed rotation in which the drum 4 is rotated at the rotational speed N4 (for example, 100 rpm) continues for a predetermined time T4 (for example, 30 sec). After the high-speed rotation of the drum 4 continues for a predetermined time T4, the same low-speed rotation and high-speed rotation as described above are alternately repeated until the time required for the rinsing process elapses.

It should be noted that, in the drum washing machine 1 of the present embodiment, the rotation speed during low-speed rotation is set so that the centrifugal force when the drum rotates is small as shown in FIG. Rotation speed (eg, 50 rpm to 70 rpm) to the extent that the pad is immersed in detergent water. Thereby, the detergent water can be penetrated into the mattress.

The rotation speed at the time of high-speed rotation is set to a rotation speed such that the detergent water in the drum 4 is slightly dehydrated from the mattress by being squeezed outward by the centrifugal force when the drum rotates as shown in (b) of FIG. 70rpm～100rpm). Thereby, the detergent water can be twisted out from the mattress.

As described above, in the front-loading washing machine 1 of the present embodiment, since the low-speed rotation and the high-speed rotation are switched at fixed time intervals, the detergent water is repeatedly permeated into the mattress or the squeezing mattress, and the squeeze cleaning effect can be obtained.

In addition, in order to prolong the time during which the mattress is immersed in the detergent water during the cleaning process, the predetermined time T1 during low-speed rotation is set to be longer than the predetermined time T2 during high-speed rotation. As a result, the detergent water can pass through the mattress, and the washing water can be sufficiently permeated into the mattress, so that the cleaning effect is improved.

On the other hand, in the rinsing process, in order to squeeze out the detergent component which penetrated into the mattress, the predetermined time T3 at the time of low-speed rotation is set to be the same as the predetermined time T4 at the time of high-speed rotation. Thereby, the number of times that the rinsing water passes through the mattress increases, so that the rinsing effect can be improved.

The drum washing machine 1 of the present embodiment is a drum washing machine that can perform a cleaning process and a rinsing process, and includes: an outer tub 3, which is arranged in the box body 2; a drum 4, which is arranged in the outer tub 3 and can rotate around a horizontal axis; A drive motor 11 for rotating the drum 4 in a prescribed direction; and a control unit 50 serving as a control unit for controlling the drive motor 11, and the control unit 50 controls the drive motor 11 to perform high-speed rotation and low-speed rotation during the washing process and the rinsing process, wherein The high-speed rotation means that the drum 4 rotates at a rotational speed greater than a predetermined rotational speed, and the low-speed rotation means that the drum 4 rotates at a rotational speed below the predetermined rotational speed.

Accordingly, in the drum washing machine 1 of the present embodiment, in at least one of the washing process and the rinsing process, the drum 4 is switched to two or more different rotation speeds. Therefore, when rotating at a high speed, the detergent water in the drum 4 is squeezed out by the centrifugal force when the drum rotates, and is slightly dehydrated from the mattress; when rotating at a low speed, the centrifugal force when the drum rotates is small and the drum 4 is internally stored There is detergent water and the mattress is soaked in water. Thereby, the squeezing cleaning effect of infiltrating the washing water into the mattress or squeezing the mattress can be obtained, the cleaning power is improved, and the unevenness of the cleaning is suppressed.

In the front-loading washing machine 1 of the present embodiment, the control unit 50 as the control unit controls the drive motor 11 to alternately switch between high-speed rotation and low-speed rotation during the washing process and the rinsing process.

Accordingly, in the drum washing machine 1 of the present embodiment, the rotation speeds at the time of high-speed rotation and at the time of low-speed rotation can be set one by one in the washing process and the rinsing process. Therefore, it is possible to vary the intensity of the squeeze wash during the washing process and the rinsing process, for example, a gentle squeeze washing can be performed during the washing process to allow detergent water to penetrate and a strong squeeze washing can be performed during the rinsing process to wring out the mattress detergent water inside.

In the front-loading washing machine 1 of the present embodiment, the control section 50 as the control unit controls the drive motor 11 to alternately switch between high-speed rotation and low-speed rotation during the washing process and alternately switch between high-speed rotation and low-speed rotation during the rinsing process. The cycle Ta of switching the rotation speed (the sum of the predetermined time T1 of high-speed rotation and the predetermined time T2 of low-speed rotation) is different from the cycle Tb of switching the rotation speed during the rinsing process (the sum of the predetermined time T3 of high-speed rotation and the predetermined time T4 of low-speed rotation).

In the drum washing machine 1 of the present embodiment, the cycle Tb of switching the rotational speed during the rinsing process is shorter than the cycle Ta of switching the rotational speed during the washing process.

Therefore, in the drum washing machine 1 of the present embodiment, the cycle Tb of switching the rotational speed during rinsing is set to be shorter than the cycle Ta of switching the rotational speed during the washing process, and the number of times of squeeze washing can be increased. Therefore, the rinsing effect can be improved by increasing the number of times the rinsing water passes through the mattress.

In the front-loading washing machine 1 of the present embodiment, the control unit 50 as the control means controls the drive motor 11 so that the low-speed rotation is performed longer than the high-speed rotation during the washing process.

Accordingly, in the drum washing machine 1 of the present embodiment, the time during the low-speed rotation is set to be longer than the time during the high-speed rotation during the washing process, and the immersion time in the detergent water can be extended. Therefore, the detergent water can pass through the mattress, and the detergent water can be sufficiently permeated into the interior of the mattress, thereby improving the cleaning effect.

As mentioned above, although embodiment of this invention was described, the specific structure of each part is not limited only to the said embodiment.

For example, in the above-mentioned embodiment, the setting of the rotation speed of the drum during the cleaning process and the rinsing process can be switched in two stages, but it is not limited to this. For example, the setting of the rotation speed of the drum in the washing process and the rinsing process may be switched in three or more stages.

In the above-described embodiment, the case where the low-speed rotation and the high-speed rotation of the drum 4 are performed in both the cleaning process and the rinsing process has been described, but the low-speed rotation of the drum 4 may be performed only in either the cleaning process or the rinsing process. and high-speed rotation.

In the above embodiment, specific examples of the drum rotation speeds N1 and N2 are shown for the cleaning process in the mattress cleaning mode, and specific examples of the drum rotation speeds N3 and N4 are shown for the rinsing process, but these drum rotation speeds can be arbitrarily set. Certainly. For example, the drum rotation speeds N1 and N3 during low-speed rotation may be, for example, 50 rpm to 70 rpm, and the drum rotation speeds N3 and N4 during high-speed rotation may be, for example, 70 rpm to 200 rpm, or preferably 70 rpm to 100 rpm.

In addition, in the above-mentioned embodiment, the case where the drum rotation speed N1 of the low-speed rotation and the drum rotation speed of the high-speed rotation N2 are always fixed during the cleaning process has been described, but the drum rotation speed N1 of the low-speed rotation and the high-speed rotation of the drum may be changed every period Ta. At least one of the rotating drum rotational speeds N2. For example, the cleaning mode can be made stronger or weaker by changing the rotational speed N2 of the high-speed rotating drum during the cleaning process. It should be noted that at least one of the drum rotation speed N3 rotating at a low speed and the drum rotation speed N4 rotating at a high speed may be changed every period Tb, and this is the same for the rinsing process.

In the above-described embodiment, specific examples of the predetermined time T1 for low-speed rotation and predetermined time T2 for high-speed rotation are shown for the cleaning process in the mattress cleaning mode, and for the rinsing process, the predetermined time T3 for low-speed rotation and high-speed rotation are shown. A specific example of the predetermined time T4 for rotation, but these predetermined times can be arbitrarily set.

In the above-described embodiment, the case where the predetermined time T1 for low-speed rotation and the predetermined time T2 for high-speed rotation are always fixed during the cleaning process has been described, but the predetermined time T1 for low-speed rotation and high-speed rotation may be changed every period Ta. At least one of the predetermined time T2 of the rotation. For example, by changing the predetermined time T2 of the high-speed rotation during the cleaning process, the cleaning method can be made stronger or weaker. It should be noted that at least one of the predetermined time T1 of the low-speed rotation and the predetermined time T2 of the high-speed rotation may be changed every period Tb, and this is the same for the rinsing process.

In the above embodiment, the period Tb of switching the rotational speed during the rinsing process is shorter than the period Ta of switching the rotational speed during the cleaning process, but it is not limited to this. In the above-described embodiment, the low-speed rotation is performed for a longer time than the high-speed rotation in the cleaning process, but it is not limited thereto. In the above-described embodiment, the time T3 during the high-speed rotation during the rinsing process is set to be the same as the time T4 during the low-speed rotation, but the present invention is not limited to this.

In the above-mentioned embodiment, the case where the mattress is washed has been described, but it can also be applied to, for example, the case where bedding other than the mattress is washed. In the above-mentioned embodiments, the front-loading washing machine 1 capable of carrying out the cleaning process, the rinsing process, and the dehydrating process has been described, but the present invention can also be applied to a washing machine that can carry out the cleaning process, the rinsing process, and the dehydrating process, and can carry out the drying process. Dryer.

Claims

A drum washing machine, which can implement a cleaning process and a rinsing process, is characterized in that it has:

The outer cylinder is arranged in the box;

The drum is arranged in the outer cylinder and can rotate around a horizontal axis or an inclined axis inclined with respect to the horizontal direction;

a drive motor for rotating the drum in a predetermined direction; and

a control unit that controls the drive motor,

The control unit controls the drive motor to perform high-speed rotation and low-speed rotation in at least one of the washing process and the rinsing process, wherein the high-speed rotation means that the drum rotates at a rotation speed greater than a predetermined rotation speed, The low-speed rotation means that the drum rotates at a rotation speed equal to or lower than the predetermined rotation speed.
The drum washing machine according to claim 1, wherein,

The control unit controls the drive motor to alternately switch the high-speed rotation and the low-speed rotation in at least one of the washing process and the rinsing process.
The front-loading washing machine according to claim 2, wherein,

the control unit controls the drive motor to alternately switch the high-speed rotation and the low-speed rotation during the washing process and alternately switch the high-speed rotation and the low-speed rotation during the rinsing process,

The cycle of switching the rotational speed in the cleaning process is different from the cycle of switching the rotational speed in the rinsing process.
The front-loading washing machine according to claim 3, characterized in that:

The cycle of switching the rotational speed during the rinsing process is shorter than the cycle of switching the rotational speed during the cleaning process.
The front-loading washing machine according to any one of claims 1 to 4, wherein,

The control unit controls the drive motor in such a manner that the low-speed rotation is performed longer than the high-speed rotation during the cleaning.