WO2020253666A1 - 洗衣机 - Google Patents

洗衣机 Download PDF

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Publication number
WO2020253666A1
WO2020253666A1 PCT/CN2020/096256 CN2020096256W WO2020253666A1 WO 2020253666 A1 WO2020253666 A1 WO 2020253666A1 CN 2020096256 W CN2020096256 W CN 2020096256W WO 2020253666 A1 WO2020253666 A1 WO 2020253666A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
tub
rotating
control unit
rotating tub
Prior art date
Application number
PCT/CN2020/096256
Other languages
English (en)
French (fr)
Chinese (zh)
Inventor
佐藤弘树
宫地成佳
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 (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 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 filed Critical 青岛海尔洗衣机有限公司
Priority to CN202080045286.9A priority Critical patent/CN113994042B/zh
Publication of WO2020253666A1 publication Critical patent/WO2020253666A1/zh

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/40—Driving arrangements  for driving the receptacle and an agitator or impeller, e.g. alternatively
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door

Definitions

  • the invention relates to a washing machine.
  • the vertical washing machine disclosed in Patent Document 1 below includes a washing tub that can store water, a washing tub that is arranged in the washing tub and contains laundry, a drive motor that generates driving force, and a washing tub that has a bottom fixed to the washing tub
  • the clutch mechanism of the rotating shaft and the brake mechanism to stop the rotation of the rotating shaft of the washing tub.
  • the washing tub is rotatably supported by the bottom wall of the washing tub via the washing tub rotating shaft.
  • the clutch mechanism can receive the driving force generated by the driving motor from the driving shaft of the driving motor and transmit or cut off the driving force to the rotating shaft of the washing tub.
  • the braking mechanism includes a braking band arranged to surround the rotating shaft of the washing tub. When the brake mechanism is working, the brake band is pressed on the outer peripheral surface of the rotating shaft of the washing tub. Therefore, the rotation of the rotating shaft of the washing tub and the washing tub stops due to the friction between the braking band and the rotating shaft of the washing tub.
  • Patent Document 1 Japanese Patent Application Publication No. 2015-62582
  • the present invention is an invention completed under such a background, and its object is to provide a washing machine capable of grasping the state of the brake.
  • the present invention is a washing machine, comprising: a cabinet; a washing tub, arranged in the cabinet, with a rotating tub for accommodating washings and a bucket for accommodating the rotating tub; a supporting member that connects the washing tub with the box Body connected to elastically support the washing tub; a motor to rotate the rotating tub; a brake to stop the rotation of the rotating tub; an acceleration sensor to detect vibration of the washing tub; and a control unit to control the The motor and the brake, and determine the state of the brake based on the detection value of the acceleration sensor.
  • the present invention is characterized in that the control unit acquires the amplitude of the waveform of the detection value of the acceleration sensor before the brake is activated and the amplitude of the waveform of the acceleration sensor before the brake is activated when the brake is activated during the rotation of the rotating tub.
  • the present invention is characterized in that when the control unit operates the brake during the rotation of the rotating drum, calculates the value of the rotating drum based on the transition of the period of the waveform of the detection value of the acceleration sensor.
  • the deceleration rate when the deceleration rate is less than or equal to a predetermined second threshold value, the control unit determines that the brake is worn by a predetermined amount or more.
  • control unit calculates the time until the rotation of the rotating tub stops based on the deceleration rate.
  • the vibration of the washing tub having the rotating tub for accommodating laundry in the washing machine is detected by the acceleration sensor.
  • the detection value of the acceleration sensor will also change with the change. That is, the detection value of the acceleration sensor is an index indicating the state of the brake.
  • the control unit of the washing machine judges the state of the brake based on the detection value of the acceleration sensor, and therefore can grasp the state of the brake.
  • the control unit determines that the brake is worn by a predetermined value or more, so the washing machine can grasp the wear state of the brake.
  • the control unit determines that the brake is worn by more than a predetermined amount, so the washing machine can grasp the wear state of the brake.
  • the time until the rotation speed of the rotating drum becomes zero can be calculated, that is, the time from the start of the brake operation to the stop of the rotation of the rotating drum can be calculated.
  • the braking time until now Therefore, compared with the case where it takes a lot of time to determine the stop of the rotation of the rotating bucket, the stop time of the rotation of the rotating bucket can be accurately determined based on the braking time, and the processing after the stop of the rotation of the rotating bucket can be quickly entered, so time can be realized. Savings.
  • Fig. 1 is a schematic vertical cross-sectional right view of a washing machine according to an embodiment of the present invention.
  • Fig. 2 is a perspective view showing a part of the main part of the washing machine in cross section.
  • Fig. 3 is a block diagram showing the electrical structure of the washing machine.
  • Fig. 4 is a time chart showing the rotation speed of the rotating tub of the washing machine during the spin-drying process.
  • Fig. 5 is a timing chart showing vibrations generated in the washing tub during dehydration.
  • Fig. 6 is a flowchart showing the dehydration process.
  • Fig. 7 is a flowchart showing brake diagnosis during dehydration.
  • Fig. 8 is a flowchart showing a dehydration process of a modified example.
  • Fig. 9 is a flowchart showing brake diagnosis during dehydration in a modified example.
  • Fig. 10 is a flowchart showing processing at the final stage in the dehydration process of the modification.
  • Fig. 1 is a schematic vertical sectional right side view of a washing machine 1 according to an embodiment of the present invention.
  • the direction orthogonal to the paper surface of FIG. 1 is called the left-right direction X of the washing machine 1
  • the left-right direction in FIG. 1 is called the front-rear direction Y of the washing machine 1
  • the vertical direction in FIG. 1 is called the vertical direction of the washing machine 1.
  • the left-right direction X, the front-rear direction Y, and the up-down direction Z are orthogonal to each other to form three dimensions.
  • the left-right direction X is sometimes called the X-axis direction
  • the front-rear direction Y is called the Y-axis direction
  • the vertical direction Z is called the Z-axis direction.
  • the back side of the paper surface of FIG. 1 is referred to as the left side X1 of the washing machine 1
  • the front side of the paper surface of FIG. 1 is referred to as the right side X2 of the washing machine 1.
  • the front-rear direction Y the left side in FIG. 1 is referred to as the front side Y1
  • the right side in FIG. 1 is referred to as the rear side Y2.
  • the upper side is referred to as the upper side Z1
  • the lower side is referred to as the lower side Z2.
  • the washing machine 1 also includes an integrated washer-dryer with a drying function
  • a washing machine that performs a washing operation in which the drying function is omitted is taken as an example to describe the washing machine 1.
  • the washing machine 1 includes a box body 2 constituting its outer shell 2, a bucket 3 arranged in the box body 2, a rotating bucket 4 housed in the bucket 3, and a rotating wing 5 housed in the rotating bucket 4.
  • the washing machine 1 includes a motor 9 that generates driving force to rotate the rotating tub 4 and the rotating wings 5 and a brake clutch mechanism 10 that applies braking to the rotation of the rotating tub 4 or transmits the driving force of the motor 9 to the rotating tub 4 intermittently.
  • the water tub 3 and the rotating tub 4 constitute a washing tub 11.
  • the box body 2 is made of, for example, metal and formed into a box shape.
  • the upper surface 2A of the box body 2 is formed to be inclined so as to extend to the upper side Z1 as it goes to the rear side Y2, for example.
  • the upper surface 2A is formed with an opening 15 for communicating the inside and the outside of the box 2.
  • a door 16 that opens and closes the opening 15 is provided on the upper surface 2A.
  • a display operation portion 17 composed of a liquid crystal operation panel or the like is provided in the area around the opening 15 in the upper surface 2A.
  • the user of the washing machine 1 can freely select the operating conditions of the washing machine 1 or give instructions to the washing machine 1 to start or stop the operation by operating the switch of the display operation unit 17 or the like. Information related to the operation of the washing machine 1 can be visually displayed on the liquid crystal panel of the display operation unit 17 or the like.
  • the bucket 3 is made of resin, for example, and is formed in a cylindrical shape with a bottom.
  • the water bucket 3 is connected to the tank 2 via a support member 12 such as a suspension rod having a spring and a damping mechanism and a shock absorber.
  • a support member 12 such as a suspension rod having a spring and a damping mechanism and a shock absorber.
  • the bucket 3 has a substantially cylindrical circumferential wall 3A arranged in the up-down direction Z, a bottom wall 3B that blocks the hollow portion of the circumferential wall 3A from the lower side Z2, and an edge surrounding the upper side Z1 of the circumferential wall 3A and An annular wall 3C protruding toward the center of the circumferential wall 3A.
  • annular wall 3C On the inner side of the annular wall 3C, there is formed an inlet and outlet 18 communicating with the hollow portion of the circumferential wall 3A from the upper side Z1.
  • the port 18 is in a state of being opposed to and communicating with the opening 15 of the box 2 from the lower side Z2.
  • a door 19 that opens and closes the entrance and exit 18 is provided on the annular wall 3C.
  • the bottom wall 3B is formed in a circular plate shape extending substantially horizontally, and a through hole 3D penetrating the bottom wall 3B is formed at a center position of the bottom wall 3B.
  • Water can be stored in the bucket 3.
  • the annular wall 3C of the water bucket 3 is connected from the upper side Z1 to a water supply channel 20 connected to a tap for tap water, and the tap water is supplied from the water supply channel 20 into the water bucket 3.
  • a water supply valve 21 opened and closed in order to start or stop water supply is provided in the middle of the water supply path 20.
  • the drain channel 22 is connected to the bottom wall 3B of the water bucket 3 from the lower side Z2, and the water in the water bucket 3 is drained from the drain channel 22 to the outside of the machine.
  • a drain valve 23 that is opened and closed in order to start or stop draining is provided in the middle of the drain channel 22.
  • the rotating tub 4 is made of, for example, a metal, and is formed in a cylindrical shape with a bottom that is slightly smaller than the water tub 3, and can store laundry Q inside.
  • the rotating tub 4 has a substantially cylindrical circumferential wall 4A arranged in the vertical direction Z and a bottom wall 4B provided at the lower end of the rotating tub 4 and blocking the hollow portion of the circumferential wall 4A from the lower side Z2.
  • the inner circumferential surface of the circumferential wall 4A is the inner circumferential surface of the rotating tub 4.
  • the upper end portion of the inner peripheral surface of the circumferential wall 4A is an access port 24 that exposes the hollow portion of the circumferential wall 4A to the upper side Z1.
  • the port 24 is formed at the upper end of the rotating tub 4.
  • the port 24 is in a state of being opposed to and communicating with the port 18 of the bucket 3 from the lower side Z2. The user throws the laundry Q into the rotating tub 4 from the upper side Z1 through the opened opening 15 and the entrances and exits 18 and 24.
  • the rotating bucket 4 is housed in the water bucket 3 in a coaxial state.
  • the rotating tub 4 in the state housed in the water tub 3 can be rotated around an axis J that constitutes its central axis and extends in the vertical direction Z.
  • a plurality of through holes 4C are formed in the circumferential wall 4A and bottom wall 4B of the rotating tub 4, and the water in the water tub 3 can pass between the water tub 3 and the rotating tub 4 through the through holes 4C. Therefore, the water level in the water bucket 3 is consistent with the water level in the rotating bucket 4.
  • the bottom wall 4B of the rotating tub 4 is formed in the shape of a circular plate extending substantially parallel to the bottom wall 3B of the bucket 3 on the upper side Z1 with an interval therebetween, and a through bottom is formed at the center of the bottom wall 4B that coincides with the axis J Through hole 4D of wall 4B.
  • the bottom wall 4B is provided with a tubular support shaft 25 that surrounds the through hole 4D and extends along the axis J to the lower side Z2.
  • the support shaft 25 is inserted into the through hole 3D of the bottom wall 3B of the bucket 3, and the lower end of the support shaft 25 is located on the lower side Z2 of the bottom wall 3B.
  • the rotating wing 5 which is a so-called pulsator, is formed in a disk shape with the axis J as the center, and is arranged on the inner bottom wall 4B of the rotating tub 4 so as to be concentric with the rotating tub 4.
  • the rotating blade 5 is provided with a rotating shaft 26 extending from its center along the axis J to the lower side Z2.
  • the rotating shaft 26 is inserted into the hollow portion of the supporting shaft 25, and the lower end of the rotating shaft 26 is located on the lower side Z2 of the bottom wall 3B of the bucket 3.
  • the motor 9 is an electric motor such as an inverter motor.
  • the motor 9 is arranged on the lower side Z2 of the water tub 3 in the housing 2.
  • the motor 9 has an output shaft 30 that rotates around the axis J, and outputs the generated driving force from the output shaft 30.
  • the output shaft 30 is connected to the lower end of the support shaft 25 of the rotating tub 4 via the brake clutch mechanism 10.
  • the output shaft 30 is connected to the lower end of the rotating shaft 26 via the speed reduction mechanism 31.
  • FIG. 2 is a perspective view showing the main parts of the rotating tub 4, the rotating wing 5, the brake clutch mechanism 10, and the speed reduction mechanism 31 in cross section.
  • the deceleration mechanism 31 and the brake clutch mechanism 10 will be described in detail.
  • the speed reduction mechanism 31 is arranged inside the tubular support shaft 25 in the rotating tub 4.
  • the portion of the support shaft 25 where the reduction mechanism 31 is accommodated is arranged as a large-diameter portion 25A having a diameter that is slightly larger than the upper and lower portions.
  • the washing machine 1 includes a cylindrical housing 32 that houses at least the large-diameter portion 25A of the support shaft 25.
  • the housing 32 is fixed to the bottom wall 3B of the bucket 3.
  • a ring-shaped flange portion 32A protruding outward in the radial direction of the casing 32 is provided in the middle of the vertical direction Z in the casing 32.
  • the housing 32 may be divided up and down at the flange portion 32A.
  • a longitudinal axis 32B extending from the flange portion 32A to the lower side Z2 is fixed to the flange portion 32A.
  • the housing 32 includes a stay 32C that protrudes outward in the radial direction of the housing 32 and is connected to the lower end of the longitudinal shaft 32B.
  • the reduction mechanism 31 is a planetary gear mechanism.
  • the reduction mechanism 31 in this case includes a sun gear 33 connected to the upper end of the output shaft 30 of the motor 9, a plurality of planetary gears 34 arranged around the sun gear 33 and meshed with the sun gear 33, and surrounding these planetary gears 34
  • the outer gears 35 meshed with the respective planetary gears 34 and the planetary carrier 36 that holds the respective planetary gears 34 in a rotatable manner and is connected to the lower end of the rotating shaft 26 of the rotary wing 5.
  • the sun gear 33 rotates integrally with the output shaft 30.
  • each planetary gear 34 revolves around the sun gear 33 while rotating, and thereby the planet carrier 36 rotates along with the rotating shaft 26. Therefore, by transmitting the driving force of the motor 9, the rotating wing 5 connected to the rotating shaft 26 rotates about the axis J at a speed lower than the output shaft 30 of the motor 9. It should be noted that since the rotating wing 5 and the motor 9 are always connected, the rotating wing 5 rotates in conjunction with the operation of the motor 9.
  • the brake clutch mechanism 10 includes a lever 39, a brake 40, a clutch 41, and an actuator 42.
  • the rod 39 has a main body 39A, is connected to the longitudinal axis 32B of the housing 32 at the main body 39A, and can rotate about the longitudinal axis 32B.
  • the rod 39 has a first protrusion 39B that protrudes laterally from, for example, the upper end of the main body portion 39A, and a second protrusion 39C that protrudes laterally from, for example, the lower end of the main body 39A.
  • the brake 40 is, for example, a brake band, and the large-diameter portion 25A of the support shaft 25 is enclosed in the housing 32.
  • one end is fixed to the housing 32, and the other end extends from the inside of the housing 32 and is fixed to the main body 39A of the rod 39.
  • the stopper 40 is wound toward or away from the outer peripheral surface of the large diameter portion 25A in accordance with the rotation of the lever 39.
  • the stopper 40 When the lever 39 rotates clockwise in a plan view, the stopper 40 is rolled to the outer peripheral surface of the large-diameter portion 25A and pressed against the outer peripheral surface. At this time, the brake 40 is in an operating state, and the rotation of the support shaft 25, that is, the rotating tub 4, is stopped by the friction force between the brake 40 and the large-diameter portion 25A. On the other hand, when the lever 39 is rotated counterclockwise in a plan view, the stopper 40 is away from the outer peripheral surface of the large diameter portion 25A. At this time, the brake 40 is in the released state, and the frictional force between the brake 40 and the large diameter portion 25A is reduced, so the rotating tub 4 can rotate.
  • the housing 32 is provided with an urging member 43 made of a coil spring or the like at the longitudinal axis 32B that supports the rod 39, and the stopper 40 is always viewed in a plan view by the urging member 43 so as to be wound on the outer peripheral surface of the large diameter portion 25A. Apply force clockwise while observing.
  • the clutch 41 includes a first engaging member 44 fixed to the output shaft 30 of the motor 9, a second engaging member 45 connected to the lower end of the support shaft 25 of the rotating tub 4, and applying the second engaging member 45 to the first engaging member 44.
  • the first engagement member 44 is an annular body arranged coaxially with the output shaft 30.
  • the upper end portion of the first meshing member 44 is provided with concave-convex-shaped teeth 44A arranged along the circumferential direction of the first meshing member 44.
  • the second meshing member 45 is a ring-shaped body that is arranged coaxially with the first meshing member 44 and is arranged on the upper side Z1 than the first meshing member 44.
  • the lower end of the second meshing member 45 is provided with concavo-convex-shaped teeth 45A arranged along the circumferential direction of the second meshing member 45.
  • the upper end of the second engagement member 45 is provided with an annular flange portion 45B that protrudes outward in the radial direction of the second engagement member 45.
  • the second engagement member 45 can integrally rotate with respect to the support shaft 25 of the rotating tub 4 and can relatively move in the vertical direction Z.
  • the urging member 46 is composed of a coil spring or the like wound around the support shaft 25, and by pressing the flange portion 45B of the second engagement member 45 from the upper side Z1, the entire second engagement member 45 is always urged to the lower side Z2.
  • the arm 47 is configured to connect the second protrusion 39C of the lever 39 and the flange portion 45B of the second engagement member 45.
  • a horizontal shaft 48 supported by the housing 32 is connected to the middle portion of the arm 47 so that the arm 47 can swing around the horizontal shaft 48.
  • the upper end portion constituting one end portion of the arm 47 is in a state facing the second protruding portion 39C from the downstream side in the clockwise direction in a plan view in FIG. 2.
  • the lower end portion constituting the other end portion of the arm 47 is in a state of opposing the flange portion 45B of the second engaging member 45 from the lower side Z2.
  • the second protrusion 39C of the lever 39 presses one end of the arm 47, whereby the arm 47 is positioned at the other end of the arm 47 to oppose the force applied by the force applying member 46, and the second engaging member 45 The state of swinging by pushing up.
  • the teeth 45A of the second meshing member 45 are in a state away from the teeth 44A of the first meshing member 44, the output shaft 30 of the motor 9 and the support shaft 25 of the rotary tub 4 are in a cut state. That is, the clutch 41 shown in FIG. 2 is in a state of cutting off the transmission path of the driving force from the motor 9 to the rotating tub 4.
  • the actuator 42 is constituted by, for example, a torque motor.
  • the brake clutch mechanism 10 includes a wire rope 49 connecting the actuator 42 and the first protrusion 39B of the rod 39.
  • the actuator 42 is turned on to pull the wire rope 49 section by section, thereby enabling the rod 39 to rotate in stages. If the brake clutch mechanism 10 in FIG. 2 is referred to as the first state, then in the first state, the brake 40 is in an operating state, and the clutch 41 is in a state of cutting off the transmission path of the driving force from the motor 9 to the rotating tub 4 .
  • the rotating tub 4 at this time is in a stationary state where it stops rotating.
  • the brake clutch mechanism 10 is usually in the first state.
  • the brake clutch mechanism 10 enters the second state (not shown).
  • the brake 40 is in the released state, and the clutch 41 is still in a state of cutting off the transmission path of the driving force from the motor 9 to the rotating tub 4.
  • the rotating tub 4 at this time is in a free state capable of rotating freely.
  • the brake clutch mechanism 10 enters the third state (not shown).
  • the brake 40 is still in the released state, and the first engaging member 44 is engaged with the second engaging member 45, whereby the clutch 41 is in a state where the transmission path of the driving force from the motor 9 to the rotating tub 4 is connected.
  • the rotating tub 4 at this time is in a state capable of receiving the driving force of the motor 9 to rotate like the rotating wing 5.
  • FIG. 3 is a block diagram showing the electrical structure of the washing machine 1.
  • the washing machine 1 includes a control unit 60.
  • the control unit 60 is configured as a microcomputer to include, for example, a CPU 61, a memory 62 such as ROM/RAM, and a timer 63 for timekeeping, and is built in the housing 2 (see FIG. 1).
  • the memory 62 stores various threshold values and the like described later.
  • the washing machine 1 further includes a water level sensor 70, a rotation speed sensor 71, an acceleration sensor 72, and a locking mechanism 73.
  • the water level sensor 70, the rotation speed sensor 71, the acceleration sensor 72, and the locking mechanism 73 plus the aforementioned motor 9, brake clutch mechanism 10, water supply valve 21, drain valve 23, and display operation unit 17 are electrically connected to the control unit 60, respectively.
  • the water level sensor 70 is a sensor that detects the water level of the washing tub 11, that is, the water level of the water tub 3 and the rotating tub 4, and the detection result of the water level sensor 70 is input to the control unit 60 in real time.
  • the rotation speed sensor 71 is a device that reads the rotation speed of the motor 9, strictly speaking, the rotation speed of the output shaft 30 of the motor 9, and is composed of, for example, a Hall IC.
  • the rotation speed read by the rotation speed sensor 71 is input to the control unit 60 in real time.
  • the control unit 60 controls the duty ratio of the voltage applied to the motor 9 based on the input rotation speed, thereby rotating the motor 9 at a desired rotation speed.
  • the rotation speed of the rotating tub 4 is the same as the rotation speed of the motor 9, and the rotation speed of the rotating blade 5 is a value obtained by multiplying a predetermined constant such as the reduction ratio of the reduction mechanism 31 by the rotation speed of the motor 9. .
  • the rotation speed sensor 71 reads the rotation speed of the motor 9 and also the respective rotation speeds of the rotating tub 4 and the rotating wing 5.
  • the control unit 60 controls the ON/OFF of the actuator 42 of the brake clutch mechanism 10 and the like to switch the brake clutch mechanism 10 to any one of the aforementioned first state, second state, and third state. That is, the control unit 60 controls the respective operations of the brake 40 and the clutch 41 in the brake clutch mechanism 10.
  • the brake clutch mechanism 10 is in the third state and the rotating tub 4 receives the driving force of the motor 9 to rotate, the washing tub 11 vibrates with the rotating wings 5, the motor 6 and the brake clutch mechanism 10.
  • the acceleration sensor 72 is mounted on, for example, the outer peripheral surface of the water tub 3 (refer to FIG. 1 ), and detects the vibration of the washing tub 11 during the rotation of the rotating tub 4. Specifically, the acceleration sensor 72 detects accelerations in the three dimensions of the X-axis direction, the Y-axis direction, and the Z-axis direction in the vibrating washing tub 11 as detection values.
  • the acceleration in the left-right direction X is a vibration component in the X-axis direction in the vibration of the washing tub 11.
  • the acceleration in the front-rear direction Y is a vibration component in the Y-axis direction of the vibration of the washing tub 11.
  • the acceleration in the vertical direction Z is a vibration component in the Z-axis direction of the vibration of the washing tub 11.
  • the lock mechanism 73 locks or releases the lock with the door 16 closed.
  • a known structure can be adopted as the lock mechanism 73.
  • the locking and unlocking of the door 16 by the locking mechanism 73 are controlled by the control unit 60.
  • the control unit 60 controls the opening and closing of the water supply valve 21 and the drain valve 23.
  • the control unit 60 receives the selection.
  • the control unit 60 displays the information provided to the user on the display operation unit 17.
  • the control unit 60 performs the washing operation by controlling the operation of the motor 9, the brake clutch mechanism 10, the water supply valve 21, and the drain valve 23.
  • the washing operation includes a washing process in which the laundry Q is washed, a rinsing process in which the laundry Q is rinsed after the washing process, and a dehydration process in which the rotating tub 4 is rotated after the rinsing process to dehydrate the laundry Q.
  • the control unit 60 opens the water supply valve 21 for a predetermined time with the drain valve 23 closed to store water in the bucket 3 and the rotating bucket 4 to a predetermined water level, and then rotates the rotary blade 5.
  • the laundry Q in the rotating tub 4 is stirred.
  • dirt is removed from the laundry Q.
  • the rotating bucket 4 may also rotate together with the rotating wing 5.
  • detergent may be put into the rotating tub 4, and in this case, the laundry Q in the rotating tub 4 is decontaminated by the detergent.
  • the control unit 60 opens the drain valve 23 to drain the water bucket 3 and the rotating bucket 4, and ends the washing process.
  • the control unit 60 opens the water supply valve 21 for a predetermined time with the drain valve 23 closed, so that the tap water is stored to a predetermined water level in the bucket 3 and the rotating bucket 4, and then the rotary wing 5 is rotated. Thereby, the laundry Q in the rotating tub 4 is rinsed.
  • the control unit 60 opens the drain valve 23 to drain the water tub 3 and the rotating tub 4, and ends the rinsing process.
  • the rinsing process can be implemented multiple times.
  • the control unit 60 rotates the rotating tub 4 at a high speed at a predetermined dehydration rotation speed with the drain valve 23 opened.
  • the dehydration process can also be implemented as an intermediate dehydration process after the cleaning process.
  • the intermediate dehydration process may also be implemented after each rinsing process other than the final rinsing process.
  • the final dehydration process is distinguished from the intermediate dehydration process after the final rinsing process and is called the final dehydration process.
  • the dehydration speed in the final dehydration process may be higher than the dehydration speed in the intermediate dehydration process. In this embodiment, the dehydration process will be described without distinguishing between the intermediate dehydration process and the final dehydration process.
  • FIG. 4 is a time chart showing the state of the rotation speed of the rotating tub 4 during the dehydration process.
  • the horizontal axis represents the elapsed time (unit: minute), and the vertical axis represents the rotation speed of the rotating tub 4 (unit: rpm).
  • the transition of the rotation speed of the rotating tub 4 is indicated by a thick line.
  • the control unit 60 locks the door 16 with the lock mechanism 73 closed. Then, the control unit 60 sets the brake clutch mechanism 10 to the third state. As a result, the rotation speed of the rotating tub 4 becomes the same as the rotation speed of the motor 9. Then, the control unit 60 accelerates the rotation speed of the motor 6 from 0 rpm to an initial rotation speed such as 120 rpm, and then causes the rotating tub 4 to stably rotate at a low-speed initial rotation speed.
  • the initial rotation speed is higher than the rotation speed (for example, 50 rpm to 60 rpm) at which the rotating drum 4 generates lateral resonance, and is lower than the rotation speed (for example, 200 rpm to 220 rpm) at which the rotating drum 4 generates longitudinal resonance.
  • the control unit 60 accelerates the rotation speed of the motor 6 from 120 rpm to an intermediate rotation speed such as 240 rpm, and then causes the rotating tub 4 to stably rotate at the intermediate rotation speed of the medium speed.
  • the intermediate speed is slightly higher than the speed at which longitudinal resonance occurs.
  • the control unit 60 accelerates the rotation speed of the motor 6 from the intermediate rotation speed to, for example, a dehydration rotation speed of 1000 rpm and maintains the dehydration rotation speed, thereby causing the rotating tub 4 to rotate stably at a high speed.
  • the laundry Q in the rotating tub 4 is dehydrated by the centrifugal force generated by the high-speed rotation of the rotating tub 4 at the dehydration speed.
  • the water seeping out from the laundry Q due to dehydration is discharged from the drain 22 to the outside of the machine. It should be noted that during the dehydration process, since the motor 6 is accelerated in stages like this, it is possible to prevent a large amount of water from seeping out of the laundry Q at one go and affecting the drainage state of the drainage channel 22 or blocking the drainage channel with bubbles. 22 such a bad situation.
  • the control unit 60 switches the brake clutch mechanism 10 from the third state to the first state. In this way, the clutch 41 cuts off the transmission path of the driving force from the motor 9 to the rotating tub 4, and the brake 40 is operated to be in the "ON" state. At this time, the control unit 60 may promptly stop the motor 9. As the brake 40 works, the rotation speed of the rotating tub 4 slowly decreases. When the rotation speed of the rotating tub 4 becomes zero and the rotating tub 4 stops, the dehydration process ends. Then, the control unit 60 releases the lock of the door 16 by the lock mechanism 73, so that the user can open the door 16 and take out the laundry Q in the rotating tub 4.
  • the brake 40 brakes the rotating tub 4 by the friction force between it and the large-diameter portion 25A of the supporting shaft 25 of the rotating tub 4. Therefore, the brake 40 gradually wears and its friction, that is, the braking force, decreases. If it is a normal state with little wear of the brake 40, the braking time G from when the brake 40 is turned “ON" to the stop of the rotation of the rotating tub 4 in the dehydration process is time G 1 . On the other hand, the braking time G in the wear state of the brake 40 worn more than a predetermined amount is the time G 2 that is longer than the time G 1 .
  • the wear state of the brake 40 can be grasped based on the length of the braking time G. Moreover, the braking time G can be predicted by the deceleration rate of the rotation speed of the rotating tub 4 while the brake 40 is in operation.
  • the rotation speed of the motor 9 read by the rotation speed sensor 71 is the rotation speed of the rotating tub 4. That is, when the brake clutch mechanism 10 is in the third state, the rotation speed of the rotating tub 4 can be detected by the rotation speed sensor 71. However, when the brake 40 is working, the brake clutch mechanism 10 is in the first state and the rotating tub 4 and the motor 9 are in a disconnected state. Therefore, the rotation speed of the rotating tub 4 cannot be detected by the rotation speed sensor 71. Therefore, it is difficult to use the rotation speed sensor 71 to grasp the wear state of the brake 40 or predict the braking time G.
  • the braking time G cannot be predicted, it is necessary to set a time G 3 that is estimated to be longer than the actual braking time G in advance.
  • the time G 3 is longer than the aforementioned time G 2 .
  • the brake clutch mechanism 10 is switched from the first state to the third state and the rotation speed of the rotating tub 4 is detected by the rotation speed sensor 71, and after confirming that the rotation speed is zero or close to zero , The door 16 is unlocked by the locking mechanism 73. Therefore, even if actually rotating tub 4 G 3 is stopped to a time earlier, the user opens the door 16 will also require additional rotation wait before the laundry inside the tub 4 Q taken.
  • FIG. 5 is a timing chart showing vibrations generated in the washing tub 11 during the rotation of the rotating tub 4 in the dehydration process.
  • the horizontal axis represents the elapsed time (unit: milliseconds)
  • the vertical axis represents the detection value of the acceleration sensor 72 (unit: for example, mm) in any one of the X-axis direction, the Y-axis direction, and the Z-axis direction. / 2 ms).
  • the transition of the detection value of the acceleration sensor 72 when the brake 40 is in the normal state is indicated by a thick solid line.
  • the detection value of the acceleration sensor 72 during the rotation of the rotating tub 4 is either in the X-axis direction, the Y-axis direction, or the Z-axis direction.
  • the detected value in either direction is shown as a waveform as shown in Figure 5.
  • the period of this waveform coincides with the rotation period of the rotating tub 4.
  • the difference between the maximum value max and the minimum value min of the detected value in the waveform is called peak-to-peak value pp.
  • each waveform W 0 of the maximum value max and minimum value min are fixed, so the respective waveform W 0
  • the peak-to-peak value pp of is approximately constant.
  • the peak-to-peak value pp of each waveform W 0 is referred to as amplitude A 0 .
  • the brake 40 When the brake 40 becomes “ON” as the dehydration time elapses, the external force for stopping the rotation of the rotating tub 4 will act on the rotating tub 4 next. In this way, the inertial force of the laundry Q in the rotating tub 4 will act on the washing tub 11, and thus the washing tub 11 will vibrate greatly. With such changes in vibration, the X-axis, Y-axis and Z-axis directions The detection value of the acceleration sensor 72 in at least one of the directions will also change. Specifically, the brake 40 immediately becomes the detected value W expressed as a waveform having an amplitude greater than a wave front A 0 W 0 between the peak after 1 pp "ON".
  • the maximum value max of the waveform W 1 is larger than the maximum value max of the waveform W 0
  • the minimum value min of the waveform W 1 is smaller than the minimum value min of the waveform W 0 .
  • the waveform W 1 T 1 of the cycle becomes higher than the waveform W 0 T 0 of the long period.
  • the detection value of the acceleration sensor 72 is an index indicating the state of the brake 40.
  • the brake 40 operates before and after The change in the vibration of the washing tub 11 will become smaller.
  • the peak-to-peak value pp of the waveform of the detection value of the acceleration sensor 72 after the brake 40 is turned "ON" (refer to the thick broken line) will not be as large as the waveform when the brake 40 is in the normal state, and the amplitude A
  • the difference dA between 0 and the peak-to-peak value PP becomes smaller. That is, the state of the brake 40 can be grasped based on the magnitude of the difference dA.
  • Fig. 6 is a flowchart showing the dehydration process.
  • the control unit 60 detects the load amount of the laundry Q in the rotating tub 4 as the dehydration process starts (step S1). Specifically, the control unit 60 sets the brake clutch mechanism 10 to the first state and rotates the motor 9. In this way, in the state where the rotating tub 4 is stopped, the rotating blade 5 carrying the laundry Q rotates. The load amount of the laundry Q is detected based on the fluctuation of the rotation speed of the motor 9 detected by the rotation speed sensor 71 at this time.
  • control unit 60 sets the brake clutch mechanism 10 to the third state, rotates the motor 9 (step S2), and gradually increases the rotation speed of the rotating tub 4 to the initial rotation speed, the intermediate rotation speed, and the dehydration rotation speed.
  • the control unit 60 confirms the load amount detected in step S1 (step S4).
  • the control unit 60 determines the predetermined first threshold value for the above-mentioned difference dA (step S5).
  • the first threshold value is a positive value that varies depending on the amount of load, and is determined in advance through experiments or the like and stored in the memory 62. Therefore, in step S5, the control unit 60 selects the first threshold value corresponding to the load amount from the first threshold values stored in the memory 62. It should be noted that the first threshold value may be set to three types corresponding to the X-axis direction, the Y-axis direction, and the Z-axis direction respectively, or only one may be set to be common in all directions.
  • the control unit 60 that has determined the first threshold obtains the waveforms of the detection values of the rotation speed sensors 71 in the X-axis direction, the Y-axis direction, and the Z-axis direction during the steady rotation of the rotating tub 4 at the dehydration speed, that is, before the brake 40 is operated.
  • the amplitude A 0 of W 0 (refer to FIG. 5) (step S6).
  • the control unit 60 acquires the latest amplitude A 0 by repeatedly acquiring the amplitude A 0 (step S6).
  • the control unit 60 activates the brake 40 and performs brake diagnosis (step S8).
  • Fig. 7 is a flowchart showing brake diagnosis.
  • the control unit 60 acquires the detection values of the acceleration sensor 72 in each of the X-axis direction, the Y-axis direction, and the Z-axis direction immediately after the brake 40 is operated (step S81).
  • the control unit 60 calculates the peak-to-peak value pp based on the maximum value max and the minimum value min of the detected values just obtained (step S82).
  • the control unit 60 calculates the difference dA by subtracting the amplitude A 0 from the peak-to-peak value pp (step S83).
  • step S84 If the difference dA exceeds the first threshold in all directions of the X-axis direction, the Y-axis direction, and the Z-axis direction (YES in step S84), the difference dA indicates that the brake 40 is in a normal state, so the control unit 60 determines The brake 40 is normal (step S85).
  • the control unit 60 determines that the brake 40 is worn by a predetermined amount or more. That is, the washing machine 1 can grasp the wear state of the brake 40. However, if the difference dA is greater than the value obtained by subtracting the positive constant ⁇ from the first threshold value (YES in step S86), the control unit 60 determines that the brake 40 is not in a malfunction state although the brake 40 is worn by more than a predetermined amount ( Step S87).
  • step S88 If the difference dA is equal to or less than the value obtained by subtracting the constant ⁇ from the first threshold value (NO in step S86), the control unit 60 determines that the brake 40 has failed (step S88). When the control unit 60 makes any one of steps S85, S87, and S88 as described above, the brake diagnosis ends. It should be noted that there is no need to judge the difference dA in all directions of the X-axis direction, the Y-axis direction, and the Z-axis direction in steps S84 and S86, for example, only one or more of which are suitable for judging the wear of the brake 40 The difference dA in the direction can be judged.
  • step S9 when it is determined in the brake diagnosis in step S8 that the brake 40 is normal (YES in step S9), the control unit 60 follows the predetermined braking according to the load of the laundry Q, etc. Time G ends the dehydration process.
  • the control unit 60 displays information indicating that the brake 40 is worn or failed or sounds an alarm on the display operation unit 17 to notify the user The person informs (step S10).
  • the control unit 60 may end the dehydration process as the braking time G elapses, or may suspend the dehydration process before the braking time G elapses.
  • the notification of step S10 may be performed after the completion of the dehydration process.
  • the control unit 60 releases the lock of the door 16 by the locking mechanism 73 after the dehydration process ends or after the suspension.
  • step S4 if the load amount of the laundry Q in the rotating tub 4 is small and less than the predetermined value ("No" in step S4), the control unit 60 will continue as the dehydration time elapses ("Yes” in step S11). ) The brake 40 is operated (step S12), but the process related to brake diagnosis is not performed. This is because it is difficult to perform accurate brake diagnosis when the load on the laundry Q is small. Then, the control unit 60 ends the dehydration process as the braking time G elapses, and unlocks the door 16.
  • the control unit 60 can determine whether the state of the brake 40 is normal, worn, or malfunction based on the detection value of the acceleration sensor 72. Therefore, the washing machine 1 can grasp the state of the brake 40. It should be noted that although based on the structure of the acceleration sensor 72, the accuracy of the detection value of the acceleration sensor 72 is low when the rotation speed of the rotating tub 4 is less than 120 rpm, but the brake diagnosis is performed when the rotation speed of the rotating tub 4 is close to the dehydration rotation speed. It is executed when the value of is higher, therefore, the brake diagnosis can be accurately performed through the high-precision detection value.
  • FIG. 8 is a flowchart showing a dehydration process of a modified example. It should be noted that in each of the drawings following FIG. 8, the same processing steps as those in FIGS. 6 and 7 are given the same step numbers as in FIGS. 6 and 7, and detailed descriptions of the processing steps are omitted.
  • the control unit 60 detects the load amount of the laundry Q in the rotating tub 4 as the dehydration process of the modified example starts (step S1). Next, the control part 60 rotates the motor 9 (step S2), and raises the rotation speed of the rotating tub 4 to a dehydration rotation speed in steps. When the rotation speed of the rotating tub 4 reaches the dehydration rotation speed (Yes in step S3), while the rotation tub 4 is stably rotating at the dehydration rotation speed, the control unit 60 confirms the load amount detected in step S1 (step S4).
  • the control unit 60 determines the predetermined second threshold value for the deceleration rate a of the rotating tub 4 when the brake 40 is subsequently activated (step S5A).
  • the second threshold value is a positive value that varies with the amount of load, and is determined in advance through experiments or the like and stored in the memory 62. Therefore, in step S5A, the control unit 60 selects the second threshold value corresponding to the load amount from the second threshold values stored in the memory 62.
  • the second threshold value may be set to three types corresponding to the X-axis direction, the Y-axis direction, and the Z-axis direction respectively, or only one may be set and be common in all directions.
  • the control unit 60 that has determined the second threshold obtains the cycle T 0 of the waveform W 0 of the detection value of the rotation speed sensor 71 in each of the X-axis direction, the Y-axis direction, and the Z-axis direction before the brake 40 operates (see FIG. 5) (step S6A) ).
  • the control unit 60 obtains the latest period T 0 by repeatedly obtaining the period T 0 (step S6A).
  • the control unit 60 operates the brake 40 and performs brake diagnosis (step S8A).
  • Fig. 9 is a flowchart showing brake diagnosis during dehydration in a modified example.
  • the control unit 60 obtains the cycle T n of each waveform of the detection value of the acceleration sensor 72 in the X-axis direction, the Y-axis direction, and the Z-axis direction immediately after the brake 40 is operated at a fixed time t (step S81A) .
  • n in the period T n is a variable representing a sequence number
  • the periods T 1 , T 2 , and T 3 are shown in FIG. 5 as the period T 0 . If the value obtained by subtracting the previous period T n-1 from the period T n is divided by the fixed time t, the instantaneous deceleration rate of the rotating drum 4 can be obtained.
  • step S83A After the control unit 60 acquires a predetermined number of cycles T (Yes in step S82A), based on these cycles T 1 to T n and the latest T 0 acquired in step S6A, calculates the deceleration rate a and Braking time G (step S83A). That is, the control unit 60 calculates the deceleration rate a of the rotating tub 4 based on the transition of the period T of the waveform of the detection value of the acceleration sensor 72.
  • the deceleration rate a is the instantaneous deceleration rate obtained by dividing the difference between the deceleration rate a of the two adjacent periods from the period T 0 to the period T n by the fixed time t The absolute value of the average. The unit is converted as necessary, and thus the unit of the deceleration rate a is, for example, rpm/ms.
  • the braking time G is obtained by dividing the spin speed by the deceleration rate a. It should be noted that the braking time G can also be corrected by adding a positive constant to the value obtained by dividing the spin speed by the deceleration rate a.
  • the control unit 60 calculates the deceleration rate a and the braking time G of the rotating tub 4 for the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively.
  • step S84A If the deceleration rate a exceeds the second threshold value in all directions of the X-axis direction, the Y-axis direction, and the Z-axis direction ("Yes" in step S84A), the deceleration rate a indicates that the brake 40 is in a normal state, and therefore the control unit 60 determines that the brake 40 is normal (step S85).
  • the control unit 60 determines that the brake 40 is worn by a predetermined amount or more. Thereby, the washing machine 1 can grasp the wear state of the brake 40. However, if the deceleration rate a is greater than the value obtained by subtracting the positive constant ⁇ from the second threshold value (YES in step S86A), the control unit 60 determines that the brake 40 is not in a malfunction state although the brake 40 is worn by more than a predetermined amount (Step S87).
  • step S88 If the deceleration rate a is less than or equal to the value obtained by subtracting the constant ⁇ from the second threshold value (NO in step S86A), the control unit 60 determines that the brake 40 has failed (step S88). When the control unit 60 makes any one of steps S85, S87, and S88 as described above, the brake diagnosis ends. It should be noted that there is no need to judge the deceleration rate a in all directions of the X-axis direction, the Y-axis direction and the Z-axis direction in steps S84A and S86A, for example, only one or more suitable for judging the wear of the brake 40 The deceleration rate a in the direction can be judged.
  • step S9 when it is determined that the brake 40 is abnormal in the brake diagnosis in step S8A (NO in step S9), the control unit 60 notifies the user that the brake 40 is worn or malfunctioning (step S10). On the other hand, if the load of the laundry Q in the rotary tub 4 is small and less than the predetermined value ("No" in step S4), the control unit 60 will follow the elapse of the dehydration time ("Yes" in step S11) The brake 40 is operated (step S12), but processing related to brake diagnosis is not performed.
  • step S21 the control unit 60 that operates the brake 40 in step S8A or step S12 monitors whether or not the braking time G has elapsed as shown in FIG. 10 (step S21).
  • the braking time G when the brake 40 is activated in step S12 is the same as the braking time G described in Fig. 6 and is a long time estimated in advance.
  • the braking time G when the brake 40 is activated in step S8A is a value calculated from the deceleration rate a in step S83A. It should be noted that, when a plurality of braking times G are calculated for the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively, the processing of step S21 is executed based on the longest braking time G.
  • step S21 When the braking time G has passed (YES in step S21), the control unit 60 switches the brake clutch mechanism 10 from the current first state to the third state (step S22). As a result, the brake 40 is released and the rotating tub 4 and the motor 9 are directly connected. Therefore, the rotation speed of the rotating tub 4 can be detected by the rotation speed sensor 71. At this time, the control unit 60 may rotate the motor 9 at a very low speed.
  • step S23 If the rotation speed of the motor 9, that is, the rotation speed of the rotating tub 4, is above the third threshold which is almost zero (NO in step S23), the control unit 60 switches the brake clutch mechanism 10 to the first state to thereby The brake 40 is operated to brake the rotating tub 4 again, while waiting for a predetermined time (step S24). Then, the control unit 60 repeats the processing after step S22.
  • the control unit 60 ends the dehydration process.
  • the control unit 60 can suspend the dehydration process before the braking time G has elapsed when the brake 40 is notified to the user of wear or failure.
  • the control unit 60 releases the lock of the door 16 by the locking mechanism 73 after the dehydration process ends or after the suspension.
  • the deceleration rate a of the rotating drum 4 can be calculated, the time until the rotation speed of the rotating drum 4 becomes zero can be calculated, that is, the time from the start of the brake 40 to the rotating drum 4 can be calculated.
  • Braking time G before rotation stops Therefore, compared with the case where it takes a lot of time to determine that the rotation of the rotating tub 4 is stopped, the stop time of the rotation of the rotating tub 4 can be accurately determined based on the braking time G, and the door 16 after the rotation of the rotating tub 4 is stopped can be quickly entered.
  • the unlocking process, etc. can save time.
  • the output shaft 30 of the motor 9 and the supporting shaft 25 of the rotating tub 4 and the rotating shaft 26 of the rotating wing 5 are arranged on the same shaft, and the driving force of the motor 9 is transmitted to the supporting shaft 25 and the rotating shaft 26 .
  • the driving force of the motor 9 may be transmitted to the support shaft 25 and the rotation shaft 26 via a transmission member such as a belt.
  • the washing machine 1 is a vertical washing machine, and the rotating tub 4 is arranged longitudinally so as to rotate around an axis J extending in the vertical direction Z.
  • the washing machine 1 may be a drum washing machine in which the rotating tub 4 is arranged such that the axis J is inclined or horizontal with respect to the vertical direction Z.
  • the rotating tub 4 can be braked by a magnetic brake arranged in the motor 9.
  • the drum washing machine can also perform brake diagnosis using the acceleration sensor 72.
  • the deceleration rate a and the braking time G may be calculated based on, for example, the transition of the difference dA.
  • the processing of FIG. 10 is executed at the final stage of the dehydration process.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
PCT/CN2020/096256 2019-06-20 2020-06-16 洗衣机 WO2020253666A1 (zh)

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JPH01317497A (ja) * 1988-06-17 1989-12-22 Matsushita Electric Ind Co Ltd 脱水機の制御装置
JPH08318086A (ja) * 1995-05-26 1996-12-03 Toshiba Corp 洗濯機
JPH09206489A (ja) * 1996-01-31 1997-08-12 Toshiba Corp 洗濯機
CN102733144A (zh) * 2011-04-04 2012-10-17 松下电器产业株式会社 洗衣机
JP2013070920A (ja) * 2011-09-29 2013-04-22 Panasonic Corp ドラム式洗濯機
CN108457048A (zh) * 2018-01-31 2018-08-28 惠而浦（中国）股份有限公司 一种检测滚筒洗衣机吊簧脱落的系统及方法

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Publication number Priority date Publication date Assignee Title
JP3914514B2 (ja) * 2003-05-21 2007-05-16 日立アプライアンス株式会社 洗濯機
CN1782191A (zh) * 2004-11-30 2006-06-07 乐金电子(天津)电器有限公司 洗衣机的制动控制方法
JP2007319184A (ja) * 2006-05-30 2007-12-13 Sharp Corp ドラム式洗濯機
JP2013013603A (ja) * 2011-07-05 2013-01-24 Toshiba Corp 洗濯機
WO2018199433A1 (en) * 2017-04-28 2018-11-01 Samsung Electronics Co., Ltd. Washing machine and control method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01317497A (ja) * 1988-06-17 1989-12-22 Matsushita Electric Ind Co Ltd 脱水機の制御装置
JPH08318086A (ja) * 1995-05-26 1996-12-03 Toshiba Corp 洗濯機
JPH09206489A (ja) * 1996-01-31 1997-08-12 Toshiba Corp 洗濯機
CN102733144A (zh) * 2011-04-04 2012-10-17 松下电器产业株式会社 洗衣机
JP2013070920A (ja) * 2011-09-29 2013-04-22 Panasonic Corp ドラム式洗濯機
CN108457048A (zh) * 2018-01-31 2018-08-28 惠而浦（中国）股份有限公司 一种检测滚筒洗衣机吊簧脱落的系统及方法

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