WO2021165978A1 - Système d'entraînement sans embrayage autonome pour machine à laver à axe vertical et machine à axe vertical associée - Google Patents

Système d'entraînement sans embrayage autonome pour machine à laver à axe vertical et machine à axe vertical associée Download PDF

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Publication number
WO2021165978A1
WO2021165978A1 PCT/IN2020/050322 IN2020050322W WO2021165978A1 WO 2021165978 A1 WO2021165978 A1 WO 2021165978A1 IN 2020050322 W IN2020050322 W IN 2020050322W WO 2021165978 A1 WO2021165978 A1 WO 2021165978A1
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WO
WIPO (PCT)
Prior art keywords
motor
vertical axis
washing machine
clutch
pulsator
Prior art date
Application number
PCT/IN2020/050322
Other languages
English (en)
Inventor
Ranjan Kumar
Sunil Baily Thomas
Navya IP
Riyaz S R
Tarunkumar Sai J
Original Assignee
Ifb Industries Limited
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 Ifb Industries Limited filed Critical Ifb Industries Limited
Publication of WO2021165978A1 publication Critical patent/WO2021165978A1/fr

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Classifications

    • 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
    • D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry 
    • D06F23/04—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry  and rotating or oscillating about a vertical axis
    • 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 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry

Definitions

  • the present disclosure generally relates a vertical axis washing machine and, in particular, relates to an autonomous clutch-less drive system for the vertical axis washing machine and the vertical axis washing machine thereof.
  • FIG. 1 illustrates a conventional vertical axis washing machine 100.
  • the vertical axis washing machine 100 has a housing including a tub 102 for receiving water and a perforated drum 104 within the tub 102 for receiving fabrics to be washed in the water.
  • the perforated drum 104 is mounted on the upper end of a drive shaft (or pulsator shaft) 106, which extends upwards within the tub 102.
  • a hollow sleeve or spin shaft (or drum shaft) 108 extends upwards within the tub 102 around the drive shaft 106.
  • the spin shaft 108 is connected to the drum 104 and the drive shaft is connected to a pulsator 110.
  • the pulsator 110 is rotatably mounted in the perforated drum 104.
  • the spin shaft 108 and the drive shaft 106 are further connected to a motor 112 and a clutch system 114 to control the rotation of the drum 104 and the pulsator 110.
  • the motor 112 initially rotates in a first direction (clockwise or anti-clockwise). This leads to rotation of the drive shaft 106, which rotates the pulsator 110, while the clutch system 114 holds the spin shaft 108 stationary so that a limited wobble-type motion or turbulence is imparted to the drum 104 for cleaning the fabrics.
  • the clutch system 114 coupled with the motor 112 engages the spin shaft 108 with the drive shaft 106 in order to spin the drum 104 in a single direction, for centrifugal extraction of liquid from the fabrics.
  • the clutch system 114 quickly stops the rotation of both the drum 104 and the pulsator 110.
  • the motor 112 rotates the drum 104 at peak speed. Due to gear ratios, the motor 112 rotates the drum 104 and the pulsator 110, which in turn creates centrifugal forces on the fabrics/clothes due to which water is thrown out through holes or perforations in the drum 104 into the tub 102.
  • a pump (not shown in the figure) drains the water from the tub 102.
  • the motor 112 rotates the drum 104 to rinse the fabrics with clean water.
  • the rinse cycle is a quick cycle that requires no detergent and runs automatically after most other wash cycles. With fabrics/clothes, the drum 104 spins to ensure that a sufficient amount of dirty water is out.
  • the intake of water in the vertical axis washing machine 100 is high by almost 20% compared to equivalent capacity front load machines.
  • the motor 112 is typically a single-phase induction motor, which is a constant speed motor.
  • the speed of the induction motor can only be controlled by sacrificing the cost of a decrease in efficiency by using a voltage control drive, and low electrical power factor by using a variable-frequency drive (VFD).
  • VFD variable-frequency drive
  • the variable speed requisite in such conventional machines, during wash and spin mode for the drum and pulsator, is thus, rendered purely as a mechanical function of a planetary gear system (included within the clutch assembly) that accompanies the washing machines.
  • Motor speed remains largely a constant value at around 1300 rotations per minute (RPM), throughout the wash or spin cycle.
  • the clutch system 114 includes multiple parts such as epicyclic gear train or gearbox 116, ratchet 118, inner shaft (not shown in the figure), outer shaft (not shown in the figure), drum case 120, brake lever 122, clutch lever 124, belt 126, clutch pulley 128, motor pulley 130, spring lever brake (not shown in the figure), clutch lever brake (not shown in the figure), nut (not shown in the figure), bolt (not shown in the figure), water seal (not shown in the figure) (inner and outer water seals), oil-less bearing (not shown in the figure), coupler connector (not shown in the figure), pawl (not shown in the figure), case gear (not shown in the figure), guide carrier (not shown in the figure), etc.
  • both the drive shaft 106 that drives the pulsator 110 and the spin shaft 108 that drives the drum 104 spin at the speed half as that of the motor 112 due to a speed reduction of 2 times, which is achieved in default in both wash and spin modes, by a difference in pulley diameters of the motor pulley 130 and the clutch pulley 128.
  • the speed of rotation of the pulsator 110 is reduced further 5.33 times in wash mode due to clutch system 114 apart from the default 2 times reduction, thereby causing a total 10.66 times speed reduction.
  • the drum 104 remains stationary while the pulsator 110 rotates in alternate directions at around 120 RPM.
  • the clutch system 114 engages both the spin shaft 108 and the drive shaft 106, and the motor 112 suddenly ramps up or increases the speed and rotates both the drum 104 and the pulsator 110 at a maximum rpm, i.e., say 650 RPM in a single direction.
  • a tub via a rotating tub shaft is connected with a dehydrating motor and an agitator is connected to a stirring shaft through a washing motor in an automatic vertical axis washing machine.
  • the washing motor is an outer rotor type, having a large diameter than the dehydrating motor.
  • the dehydrating motor is an inner rotor type and is located outside the washing motor.
  • the solution does not require a clutch mechanism or the speed reduction mechanism, and independently control the rotation of the tub and the agitator.
  • a washing machine comprises an outer cylinder, an inner cylinder, an impeller and a driving device.
  • the driving device comprises an annular reluctance rotor, a permanent magnetic rotor, and a stator.
  • the stator, the reluctance rotor and the permanent magnetic rotor are nested in turn from the inside to the outside and rotatable mutually.
  • the stator the reluctance rotor and the permanent magnetic rotor, each two of them which are adjacent are separated by an air gap.
  • the stator comprises a stator core and a first winding and a second winding.
  • the first winding and the second winding are winded around the stator core and mutually exclusive.
  • the first winding and the second winding respectively correspond to the reluctance rotor and the permanent magnetic rotor, so as to respectively and exclusively drive the reluctance rotor and the permanent magnetic rotor to rotate, wherein, the reluctance rotor and the permanent magnetic rotor are respectively and relatively and fixedly connected with the inner cylinder and the impeller respectively and exclusively to drive the inner cylinder and the impeller to rotate.
  • a manner of non-mechanical differential rotational speed and non-clutch is adopted so that dual power washing and dehydration are realized, system integration degree is high, energy consumption is low and clean ratio is high.
  • a motor for a washing machine with a dual rotor-dual stator structure with no independent clutch is used and along with selectively using an impeller and a dewatering tank.
  • a driving signal is generated according to a washing control signal, and the motor for the washing machine is controlled to be driven.
  • a transducer, three-phase alternating current is generated under the control of the motor control portion, and the three-phase alternating current is output to the thirteenth phase stator coil for driving the outer rotor of the motor to rotate and output to the twenty -third phase stator coil for driving the inner rotor of the motor to rotate.
  • a first rotor driving control portion which is arranged between the transducer and the twenty-third phase stator coil, blocks or permits the three-phase alternating current to pass under the control of the motor control portion, and the rotation direction of the inner rotor is controlled.
  • a clutchless motor drive system for a vertical axis washing machine comprises an electric motor including a rotor shaft, a first main winding and a second main winding.
  • the first and second main windings are selectively energizable to operate the motor at first and second speeds, and at least one of the windings is a permanent split capacitor winding.
  • a transmission is coupled to the rotor shaft, and the rotor shaft engages the transmission without employing a clutch mechanism.
  • an autonomous clutch-less drive system for a vertical axis washing machine includes a first motor adapted to rotate a perforated drum of the vertical axis washing machine in a plurality of operating modes.
  • the autonomous clutch-less drive system includes a second motor adapted to rotate a pulsator of the vertical axis washing machine independent of the first motor in the plurality of operating modes.
  • the first motor and the second motor are arranged in the vertical axis washing machine in one of a first operating configuration and a second operating configuration. In the first operating configuration, the first motor is located in line to the second motor and in the second operating configuration the first motor is located perpendicular to the second motor.
  • a vertical axis washing machine comprises a perforated drum.
  • the vertical axis washing machine comprises a pulsator rotatably mounted in the perforated drum.
  • the vertical axis washing machine comprises a first shaft connected to the perforated drum and a second shaft connected to the pulsator.
  • the vertical axis washing machine further comprises an autonomous clutch-less drive mechanism comprising of a first motor and a second motor.
  • the first motor is adapted to rotate the perforated drum in a plurality of operating modes.
  • the first shaft is connected to the first motor to rotate the perforated drum in response to rotation of the first motor.
  • the second motor is adapted to rotate the pulsator independent of the first motor in the plurality of operating modes.
  • the second shaft is connected to the second motor to rotate the pulsator in response to rotation of the second motor.
  • the first motor and the second motor are arranged in the vertical axis washing machine in one of a first operating configuration and a second operating configuration. In the first operating configuration, the first motor is located in line with the second motor. In the second operating configuration, the first motor is located perpendicular to the second motor.
  • the advantages of the present disclosure include, but not limited to, enabling controlling of the two motors independently since the two motors are operating independently of each other.
  • the two motors can be located in-line or perpendicular to each other, depending on available space.
  • These mounting arrangements or operating configurations will provide flexibility and stability to the washing machine. Further, such mounting arrangements eliminates the use of drain-pump motor/clutch retractor motor used in conventional vertical axis washing machines and the same can be effectively replaced by a solenoid valve for draining the water. This further leads to a cost benefit.
  • FIG. 1 illustrates a sectional view of a vertical axis washing machine as known in the art
  • FIG. 2 illustrates a block diagram of a vertical axis washing machine comprising an autonomous clutch-less drive system, in accordance with some embodiments of the present disclosure
  • FIG. 3A and FIG. 3B illustrate sectional views of the vertical axis washing machine comprising the autonomous clutch-less drive system, in accordance with some embodiments of the present disclosure
  • FIG. 4A illustrates a bottom view of the vertical axis washing machine comprising a first configuration of the autonomous clutch-less drive system, in accordance with one embodiment of the present disclosure
  • FIG. 4B schematically illustrates a bottom view of the vertical axis washing machine comprising a second configuration of the autonomous clutch-less drive system, in accordance with other embodiment of the present disclosure
  • FIG. 5A and FIG. 5B illustrate various views of the vertical axis washing machine comprising the autonomous clutch-less drive system in the second configuration, in accordance with other embodiment of the present disclosure.
  • FIG. 6 illustrates a sectional view of the autonomous clutch-less drive system, in accordance with some embodiments of the present disclosure
  • FIG. 7 illustrates a block diagram of the vertical axis washing machine comprising the autonomous clutch-less drive system, in accordance with some other embodiments of the present disclosure.
  • FIG. 8 illustrates a bottom view of a vertical axis washing machine comprising a first configuration of the autonomous clutch-less drive system, in accordance with one other embodiment of the present disclosure.
  • FIG. 2 illustrates a block diagram of a vertical axis washing machine 200, the construction and operation of which is well known in the art, and in which the present invention is implemented.
  • the vertical axis washing machine 200 also known as top-loading washing machine, comprises an autonomous clutch-less drive system 202, in accordance with some embodiments of the present disclosure.
  • FIG. 3A & FIG. 3B illustrates a sectional view of the vertical axis washing machine 200 comprising the autonomous clutch-less drive system 202, in accordance with some embodiments of the present disclosure.
  • the vertical axis washing machine 200 comprises a cabinet housing 201 including a tub 204 adapted to be filled with wash water or rinse water through a fill tube (not shown) in response to user selection of various control buttons located on a control panel (not shown) of the vertical axis washing machine 200.
  • the vertical axis washing machine 200 includes a perforated drum 206 and a pulsator 208.
  • the perforated drum 206 is mounted within the tub 204 to receive fabrics or clothes.
  • the pulsator 208 is rotatably mounted within the perforated drum 206 such that the fabrics are subjected to washing action by the pulsator 208 after the introduction of water and the user-selection of the control button.
  • the perforated drum 206 is rotated about a vertical axis AA’ at high speed in order to extract water from the fabrics during the spin mode.
  • the water is drained into a sump (not shown) and pumped to a drain (not shown) by a pump assembly (not shown).
  • the perforated drum 206 and the pulsator 208 are independently driven by the autonomous clutch-less drive system 202.
  • the autonomous clutch-less drive system 202 includes a first motor 210 adapted to rotate the perforated drum 206 in a plurality of operating modes.
  • the first motor 210 is adapted to cause an orbital movement of the perforated drum 206.
  • the first motor 210 is selected from a group comprising of a brushless DC (BLDC) motor, induction motor, and switched reluctance motor.
  • BLDC brushless DC
  • the BLDC motors can be constructed in different physical configurations such as single-phase, two-phase, or three-phase motors based on stator windings.
  • three-phased BLDC motor with permanent magnet rotor operating at 1600 rotations per minute (RPM) to 3600 RPM is selected as the first motor 210.
  • the first motor 210 is located below the tub 204.
  • the first motor 210 can be securely mounted to the tub 204 using techniques as known in the art.
  • the first motor 210 and the perforated drum 206 are connected through a first shaft (also referred to as spin shaft or drum shaft, and not shown in the figure) and a first pulley mechanism 214 such that the first shaft rotates the perforated drum 206 in response to a rotation of the first motor 210.
  • the first pulley mechanism 214 is coupled to the first motor 210 and the first shaft.
  • the autonomous clutch-less drive system 202 includes a second motor 212 adapted to rotate the pulsator 208 independent of the first motor 210 in the plurality of operating modes.
  • the second motor 212 is adapted to cause a wobble movement of the pulsator 208.
  • the wobble movement of the pulsator 208 creates agitation and relative movement of clothes or fabric thereby attaining a decent wash quality.
  • the second motor 212 is selected from a group comprising of a brushless DC (BLDC) motor, induction motor, and switched reluctance motor.
  • BLDC brushless DC
  • the BLDC motors can be constructed in different physical configurations such as single-phase, two-phase, or three-phase motors based on stator windings.
  • three-phased BLDC motor with permanent magnet rotor operating at 1600 RPM to 3600 RPM is selected as the second motor 212.
  • the second motor 212 is located below the tub 204.
  • the second motor 212 can be securely mounted to the tub 204 using techniques known in the art.
  • the second motor 212 and the pulsator 208 are connected through a second shaft (also referred to as driveshaft or pulsator shaft, and not shown in the figure) and a second pulley mechanism 216 such that the second shaft rotates the pulsator 208 in response to a rotation of the second motor 212.
  • the second pulley mechanism 216 is coupled to the second motor 212 and the second shaft.
  • the first motor 210 and the second motor 212 are arranged in the vertical axis washing machine 200, i.e., below the tub 204, in one of a first operating configuration and a second operating configuration.
  • FIG. 4A and FIG. 4B illustrates a bottom view of the vertical axis washing machine 200 depicting the first motor 210 and the second motor 212 securely attached to the tub 204.
  • the first operating configuration 402 is illustrated.
  • the first motor 210 is located in line with or opposite to the second motor 212.
  • the second operating configuration 404 is illustrated.
  • the first motor 210 is located perpendicular to the second motor 212.
  • Such operating configurations or mounting arrangements provide the flexibility of manufacturing the vertical axis washing machine 200 and stability to the vertical axis washing machine 200 while in operation. Further, such operating configurations eliminate the use of drain-pump motor/clutch retractor motor (not shown) used in conventional vertical axis washing machines and the same can be effectively replaced by solenoid valve for draining the water. This further leads to a cost benefit. Further, the operating configuration of the first motor 210 and the second motor 212 in the autonomous clutch-less drive system 202 enables enhanced independent control over the rotation of the pulsator 208 and the perforated drum 206. This leads to improved wash quality, reduced water consumption, reduced wash time, reduced power consumption, and improved life of the washing machine as the wobble movement of the pulsator 208 is better controlled independently of the orbital movement of the perforated drum 206.
  • the autonomous clutch-less drive system 202 includes a first controller 218 and a second controller 220.
  • the first controller 218 controls operating parameters of the first motor 210 in the plurality of operating modes.
  • the second controller 220 controls operating parameters of the second motor 212 independent of the first controller 218 in the plurality of operating modes.
  • the operating parameters include a speed of rotation, a direction of rotation, and a torque. This enables controlling the two motors independently since the two motors are operating independently of each other.
  • Each of the first controller 218 and the second controller 220 includes an intelligent power module (IPM), a microcontroller, and other associated electronic components to control the operating parameters of the first motor 210 and the second motor 212.
  • the IPM is an advanced power switch device designed for high-speed switching drive.
  • the first controller 218 and the second controller 220 may be coupled with a main controller of the vertical axis washing machine 200.
  • the main controller may control various functionalities of the vertical axis washing machine 200 such as filling the tub 204 with water, rinsing, washing, etc., in response to user selection of various control buttons located on a control panel (not shown) of the vertical axis washing machine 200. Based on the user selection, the main controller may provide input to the first controller 218 and the second controller 220 to control the first motor 210 and the second motor
  • the plurality of operating modes enable controlling of one or more of the operating parameters of both the first motor 210 and the second motor 212.
  • the plurality of operating modes are configured or enabled through the first controller 218 and the second controller 220.
  • the plurality of operating modes can be defined as variants of wash mode or wash cycle and can be provided as control buttons located on the control panel for user selection.
  • the speed of both the first motor 210 and the second motor 212 are controlled independently while the direction of rotation of both the first motor 210 and the second motor 212 is same.
  • the direction of rotation of both the first motor 210 and the second motor 212 is controlled independently while the speed of both the first motor 210 and the second motor 212 is same.
  • the first motor 210 and the second motor 212 are rotated in opposite directions. Such operating mode is generally termed as wash mode.
  • the perforated drum 206 is rotated in a direction (either in clockwise direction or in anti-clockwise direction) due to the rotation of the first motor 210 while the pulsator 208 is rotated in opposite direction (either in anti-clockwise direction or in clockwise direction) due to the rotation of the second motor 212.
  • the first motor 210 and the second motor 212 are rotated in the same direction.
  • Such operating mode can be incorporated during a wash mode or a spin mode.
  • the perforated drum 206 is rotated in a direction (either in clockwise direction or in anti-clockwise direction) due to the rotation of the first motor 210 while the pulsator 208 is rotated in the same direction (either in clockwise direction or in anti-clockwise direction) due to the rotation of the second motor 212.
  • the first motor 210 is rotated continuously in a first direction and the second motor 212 is rotated in a stepped manner in a second direction opposite to the first direction.
  • the perforated drum 206 rotates continuously in a direction (either in clockwise direction or in anti-clockwise direction) due to the rotation of the first motor 210 while rotation of the pulsator 208 is controlled in a stepped manner in opposite direction (either in anti clockwise direction or in clockwise direction) due to the rotation of the second motor 212.
  • the second motor 212 is rotated continuously in a first direction and the first motor 210 is rotated in a stepped manner in a second direction opposite to the first direction.
  • the pulsator 208 rotates continuously in a direction (either in clockwise direction or in anti-clockwise direction) due to the rotation of the second motor 212 while rotation of the perforated drum 206 is controlled in a stepped manner in opposite direction (either in anti-clockwise direction or in clockwise direction) due to the rotation of the first motor 210.
  • the first motor 210 is rotated while the second motor 212 is at a halt.
  • the perforated drum 206 is rotated in any direction (either in a clockwise direction or in an anti-clockwise direction) due to the rotation of the first motor 210, while the pulsator 208 is stopped.
  • the second motor 212 is rotated while the first motor 210 is at a halt.
  • the pulsator 208 is rotated in any direction (either in a clockwise direction or in an anti-clockwise direction) due to the rotation of the second motor 212, while the perforated drum 206 is stopped.
  • infinite motion capabilities are provided to the vertical axis washing machine 200 according to the plurality of operating modes, thereby controlling the wobble movement of the pulsator 208 independently of the perforated drum 206.
  • FIG. 5A illustrates a side view of the vertical axis washing machine 200 comprising the autonomous clutch-less drive system 202 in second operating configuration, in accordance with other embodiment of the present disclosure.
  • FIG. 5B illustrates an isometric view of the vertical axis washing machine 200 comprising the autonomous clutch-less drive system 202 in second operating configuration, in accordance with other embodiment of the present disclosure.
  • the autonomous clutch-less drive system 202 includes the first pulley mechanism 214 coupled to the first motor 210 and the perforated drum 206.
  • the first pulley mechanism 214 comprises a first driving pulley 502 and a first belt 504.
  • the first belt 504 is coupled to the first driving pulley 502 and the first motor 210.
  • the first driving pulley 502 and the first belt 504 can be coupled and can be securely mounted below the tub 204 using techniques as known in the art.
  • the autonomous clutch-less drive system 202 includes the second pulley mechanism 216 coupled to the second motor 212 and the pulsator 208.
  • the second pulley mechanism 216 comprises a second driving pulley 506 and a second belt 508.
  • the second belt 508 is coupled to the second driving pulley 506 and the second motor 212.
  • the second driving pulley 506 and the second belt 508 can be coupled and can be securely mounted below the tub 204 using techniques as known in the art.
  • FIG. 6 illustrates the autonomous clutch-less drive system 202, in accordance with other embodiment of the present disclosure.
  • a first shaft 602 (also referred to as spin shaft or drum shaft) connects the first motor 210 with the perforated drum 206 such that the first shaft 602 rotates the perforated drum 206 in response to rotation of the first motor 210.
  • the autonomous clutch-less drive system 202 includes the first pulley mechanism 214 coupled to the first motor 210 and the perforated drum 206.
  • the first pulley mechanism 214 is coupled to the first shaft 602 and the first motor 210.
  • the first belt 504 is coupled to the first driving pulley 502 and the first motor 210 to rotate the perforated drum 206 in a direction of the rotation of the first motor 210 through the first shaft 602.
  • a second shaft 604 (also referred to as driveshaft or pulsator shaft) connects the second motor 212 with the pulsator 208 such that the second shaft 604 rotates the pulsator 208 in response to rotation of the second motor 212.
  • the second shaft 604 is rotatably arranged concentrically inside the first shaft 602 and therefore the first shaft 602 is a hollow shaft and the second shaft 604 is a solid shaft.
  • the first shaft 602 and the second shaft 604 extend upwards within the tub such that the first shaft 602 extends around the second shaft 604.
  • the first shaft 602 and the second shaft 604 are aligned with the vertical axis AA’ of the washing machine 200.
  • the perforated drum 206 and the pulsator 208 are mounted on an upper end of the shafts and the first motor 210 and the second motor 212 are mounted on a lower end of the shaft.
  • the autonomous clutch-less drive system 202 includes the second pulley mechanism 216 coupled to the second motor 212 and the pulsator 208 such that the rotation of the first motor 210 is independent of the rotation of the second motor 212.
  • the second pulley mechanism 216 is coupled to the second shaft 604 and the second motor 212.
  • the second belt 508 is coupled to the second driving pulley 506 and the second motor 212 to rotate the pulsator 208 in a direction of the rotation of the second motor 212 through the second shaft 604.
  • the separate pulley mechanisms for the motors alleviate any constraints of the motors as well as existing clutch based conventional system.
  • the pulley reduction ratio is 1:10 times the motor pulley to drum & pulsator pulley ratios.
  • each of the operating parameters can be controlled, i.e., increased or decreased, by changing the size of the pulley mechanisms. This further leads to having infinite motion capabilities.
  • the vertical axis washing machine 200 including the autonomous clutch-less drive system 202 reduces the number of mechanical components used in the transmission. This improves the life of the vertical axis washing machine 200. Further, the use of such mechanism will impart extensive wobble movement of the pulsator 208 to the fabrics as compared to conventional mechanism, resulting in high wash quality.
  • FIG. 7 illustrates a block diagram of the vertical axis washing machine 200 in accordance with some other embodiments of the present disclosure.
  • the vertical axis washing machine 200 includes an auxiliary pulsator 700 having a diameter lesser than a diameter of the pulsator 208.
  • the auxiliary pulsator 700 is rotatably and concentrically mounted on the pulsator 208 and is connected to the second shaft 604.
  • the autonomous clutch-less drive system 202 includes an auxiliary motor 702 connected to the second shaft 604 to rotate the auxiliary pulsator 700.
  • the auxiliary motor 702 is adapted to rotate the auxiliary pulsator 700 independent of the first motor 210 and the second motor 212.
  • the auxiliary motor 702 is selected from a group comprising of a brushless DC (BLDC) motor, induction motor, and switched reluctance motor.
  • BLDC brushless DC
  • the BLDC motors can be constructed in different physical configurations such as single-phase, two-phase, or three-phase motors based on stator windings.
  • three- phased BLDC motor with permanent magnet rotor operating at 1600 RPM to 3600 RPM is selected as the auxiliary motor 702.
  • the auxiliary motor 702 is located below the tub 204.
  • the auxiliary motor 702 can be securely mounted to the tub 204 using techniques as known in the art.
  • the auxiliary motor 702 is arranged in the vertical axis washing machine 200, i.e., below the tub 204, in one of the first operating configuration and the second operating configuration. In the first operating configuration, the auxiliary motor 702 is located perpendicular to the first motor 210. In the second operating configuration, the auxiliary motor 702 is located in line with the first motor 210.
  • FIG. 8 illustrates a bottom view of a vertical axis washing machine 800 depicting the first motor 210, the second motor 212, and the auxiliary motor 702 securely attached to the tub 204.
  • the first operating configuration is illustrated.
  • the first motor 210 is located in line with or opposite to the second motor 212.
  • the auxiliary motor 702 is located perpendicular to the first motor 210.
  • the autonomous clutch-less drive system 202 includes an auxiliary controller 704 to control operating parameters of the auxiliary motor 702 independent of the first controller 218 and the second controller 220 in the plurality of operating modes.
  • the auxiliary controller 704 may be coupled with the main controller of the vertical axis washing machine 200.
  • the direction of rotation of both the first motor 210 and the auxiliary motor 702 are same.
  • the direction of rotation of both the second motor 212 and the auxiliary motor 702 are the same.
  • the autonomous clutch-less drive system 202 provides various advantages such as improved wash quality, reduced water consumption, reduced wash time, reduced power consumption, and improved life of the washing machine due to controlling the movement of the pulsator 208 independently of the perforated drum 206.

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  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

La présente invention concerne un mécanisme d'entraînement sans embrayage autonome pour une machine à laver à axe vertical. Le mécanisme d'entraînement sans embrayage comprend un premier moteur conçu pour faire tourner un tambour perforé de la machine à laver à axe vertical dans une pluralité de modes de fonctionnement ; et un second moteur conçu pour faire tourner un pulsateur de la machine à laver à axe vertical indépendamment du premier moteur dans la pluralité de modes de fonctionnement ; le premier moteur et le second moteur étant agencés dans la machine à laver à axe vertical dans une première configuration de fonctionnement ou une seconde configuration de fonctionnement de telle sorte que le premier moteur est disposé en ligne par rapport au second moteur dans la première configuration de fonctionnement et que le premier moteur est disposé perpendiculairement au second moteur dans la seconde configuration de fonctionnement.
PCT/IN2020/050322 2020-02-18 2020-04-02 Système d'entraînement sans embrayage autonome pour machine à laver à axe vertical et machine à axe vertical associée WO2021165978A1 (fr)

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IN202041006919 2020-02-18
IN202041006919 2020-02-18

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080289370A1 (en) * 2007-05-22 2008-11-27 Samsung Electronics Co., Ltd. Washing machine fitting multiple motors and tub thereof
WO2018038009A1 (fr) * 2016-08-26 2018-03-01 日本電産テクノモータ株式会社 Machine à laver
US20180355540A1 (en) * 2016-08-18 2018-12-13 Samsung Electronics Co., Ltd. Washing machine
US20190017210A1 (en) * 2017-07-14 2019-01-17 Samsung Electronics Co., Ltd. Washing apparutus and controlling method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080289370A1 (en) * 2007-05-22 2008-11-27 Samsung Electronics Co., Ltd. Washing machine fitting multiple motors and tub thereof
US20180355540A1 (en) * 2016-08-18 2018-12-13 Samsung Electronics Co., Ltd. Washing machine
WO2018038009A1 (fr) * 2016-08-26 2018-03-01 日本電産テクノモータ株式会社 Machine à laver
US20190017210A1 (en) * 2017-07-14 2019-01-17 Samsung Electronics Co., Ltd. Washing apparutus and controlling method thereof

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