US20220162791A1 - Balancing system for a washing machine - Google Patents
Balancing system for a washing machine Download PDFInfo
- Publication number
- US20220162791A1 US20220162791A1 US17/598,603 US201917598603A US2022162791A1 US 20220162791 A1 US20220162791 A1 US 20220162791A1 US 201917598603 A US201917598603 A US 201917598603A US 2022162791 A1 US2022162791 A1 US 2022162791A1
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- Prior art keywords
- compartment
- compartments
- controller
- drum
- pair
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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Classifications
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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
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
- D06F37/225—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
-
- 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
- D06F33/48—Preventing or reducing imbalance or noise
-
- 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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/16—Imbalance
-
- 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
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/24—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a vertical axis
- D06F37/245—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
-
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/26—Unbalance; Noise level
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
Definitions
- the disclosure relates to a balancing system for a washing machine and to a method for operating a balancing system of a washing machine.
- washing machine comprising a drum
- present disclosure will mainly be described in conjunction with a washing machine comprising a horizontally rotating drum.
- the balancing problem of a washing machine when spinning at high rotational speeds, e.g., during a drying cycle, is one of the most important problems. It is an important criterion that affects the performance of the machine. It is desirable to distribute the laundry in a balanced way in the machine, but this is virtually impossible since the laundry will distribute within the drum in an accidental manner. An unbalanced drum will cause strong vibration if not moving of the washing machine and also produces a lot of noise. Previous solutions to this problem are mainly based on estimations of the imbalance by software and the subsequent correction of this imbalance by various means which may require a relatively high number of trial and error cycles.
- washing machine comprising
- the second controller may be configured to:
- a first imbalance value when the first imbalance value is above a predefined imbalance value, control the pump to transfer liquid from one compartment of the pair of compartments to the second compartment of the pair of compartments, and determine a second imbalance value, wherein when determining that the second imbalance value is below the first imbalance value and not below the predefined imbalance value, control the pump to continue transferring liquid from one compartment of the pair of compartments to the second compartment of the pair of compartments, wherein when determining by the second controller that the second imbalance value is above the first imbalance value, control the pump to transfer liquid from the second compartment of the pair of compartments to the first compartment of the pair of compartments, and wherein when determining by the second controller that the second imbalance value is below the predefined imbalance value, control the pump to stop transferring liquid.
- the washing machine may comprise a transmitter connected to the second controller and comprises a receiver connected to the first controller, and the second controller is configured to transfer a control signal via the transmitter to the receiver of the first controller wirelessly.
- the washing machine may comprise a power source on the drum configured to provide electrical energy to the first controller and the at least one compartment system, wherein the power source is replaceable and/or wirelessly rechargeable.
- the washing machine may comprise at least two of the compartment systems, preferably two of the compartment systems, and all compartments on the drum being equidistant to each other on the wall of the drum and the first controller being connected to each pump of the respective compartment systems.
- Each pair of compartments of one compartment system may be connected by a separate pipe and each pair of compartments of one compartment system may form a closed liquid circuit.
- All compartments of the compartment systems may be connected by a shared pipe connecting all compartments with each other and the entirety of the compartment systems may form a closed liquid circuit.
- the method may comprise determining a first imbalance value
- FIG. 1 illustrates a washing machine 100 of the present disclosure.
- FIG. 2 illustrates a section of the compartment system 105 for a washing machine 100 of the present disclosure.
- FIG. 3 illustrates a method for balancing the drum 102 of a washing machine 100 using the compartment system 105 of the present disclosure.
- FIG. 1 schematically illustrates a washing machine 100 of the present disclosure.
- the washing machine 100 comprises a drum 102 , into which laundry is to be placed and a tub 103 wherein the drum 102 moves in rotating fashion.
- a housing 101 of the drum 102 is also illustrated.
- the view is a view along the rotational axis of the drum 102 .
- the washing machine 100 can be a washing machine 100 with a horizontally moving drum 102 or a vertically moving drum 102 , preferably a washing machine 100 with a horizontally moving drum 102 .
- the drum 102 consists of cylindrical wall and a disk-like backside and is open to the front side.
- the washing machine 100 can comprise a lid (not illustrated) reversibly sealing or closing the tub 103 from the exterior of the housing 101 .
- the tub 103 is sealed from the inside of the housing 101 to prevent liquid from flowing into the housing 101 and connected by conventional tubing 103 to a water inlet and a water outlet (not illustrated).
- the washing machine 100 can also comprise a motor 104 for rotatably moving the drum 102 via driving means, i.e., a drive, e.g., by a wheel connected to the backside of the drum 102 and a belt connecting the drum 102 with a drive of the motor 104 .
- the drum 102 may comprise at least one baffle (not illustrated) positioned on the wall, preferably three or five baffles which assist in preventing the laundry from sticking to the inside of the wall of the drum 102 and assist in creating turbulences in the washing liquid comprising the laundry and thus an improved washing efficiency.
- the washing machine 100 is equipped with a compartment system 105 for reducing the potential imbalance of a drum 102 of the washing machine 100 as illustrated in FIG. 1 and also in more detail in FIG. 2 .
- the washing machine 100 comprises at least one compartment system 105 .
- the compartment system 105 comprises a pair, i.e., two, compartments 106 suitable for storing a liquid.
- the two compartments 106 of the pair of compartments 106 placed centrosymmetrical with respect to the center of the drum 102 on the wall of the drum 102 , i.e., they are positioned on those sections of the wall of the drum 102 which are opposed to each other.
- the compartments 106 are firmly affixed to the drum 102 by suitable attachment means, e.g., by welds, screws, etc.
- the compartments 106 can be made of any suitable fluid-tight material, like e.g., metal or plastic.
- Each of the compartments may be have the same dimensions and especially be configured to house the same volume.
- a pipe 107 (or tubing) fluidly couples the two compartments 106 .
- the pipe 107 is placed on the wall of the drum 102 and is firmly affixed to the drum 102 by suitable attachment means, e.g., by welds, screws, etc.
- suitable attachment means e.g., by welds, screws, etc.
- the pipe 107 is placed circumferentially over the wall of the drum 102 . In this way the pipe 107 is prevented from detaching from the drum 102 even when the drum 102 is spinning at high speed.
- a pipe 107 can be made of any suitable fluid-tight material, like e.g., metal or plastic.
- FIG. 2 it is illustrated that one compartment 106 is connected to two pipes 107 , however, it also possible that the compartment 106 is connected to only one pipe 107 .
- the compartment system 105 also comprises at least one pump 108 which may be positioned directly at the connection between one compartment 106 and the pipe 107 or at any section of the pipe 107 .
- the pump 108 is bidirectional and thus configured to pump 108 liquid from one compartment 106 of the pair of compartments 106 to the second compartment 106 of the pair of compartments 106 and vice versa, i.e., from the second compartment 106 into the first compartment 106 .
- the compartment system 105 can be equipped with valves 114 regulating the flow between compartments 106 which may be positioned directly at the connection between one compartment 106 and the pipe 107 or at any section of the pipe 107 .
- the valves 114 are placed at a connection between the compartment 106 and the pipe 107 . Due to the valves 114 the pump 108 does not prevent the flow of fluid when the pump 108 is turned off and the amount of liquid in the compartments 106 can be maintained without an activated pump 108 .
- Each compartment may be sealable from the remainder of the compartment system by two valves 114 .
- the compartment system 105 is a closed circuit with respect to the liquid contained therein. Thus, regularly no liquid is removed from the compartment system 105 or added.
- a maintenance valve (not illustrated) which is closed during operation of the washing machine 100 and provides a connection from the compartment system 105 to the space outside the compartment system 105 may be provided. In this way, the liquid may be exchanged, removed or added when required when the washing machine 100 is not operating.
- the liquid may be any suitable liquid, that is liquid at room temperature.
- the liquid may be water, distilled water or/and water containing preservatives. Before operation the pipes may be filled completely with liquid and the liquid in each compartment of the compartment system 105 may occupy up to 50 vol./vol. % of the volume of each compartment 106 .
- Each compartment 106 can also comprise a gaseous exchange means 115 , e.g., a membrane window 115 , which is impermeable to the liquid in the compartment system 105 , but permeable to air. Due to the gaseous exchange means 115 it is possible to modify the amount of liquid within a compartment 106 without producing a pressure drop or rise in the compartments 106 when adapting the amount of liquid in the respective compartments 106 .
- a gaseous exchange means 115 e.g., a membrane window 115 , which is impermeable to the liquid in the compartment system 105 , but permeable to air. Due to the gaseous exchange means 115 it is possible to modify the amount of liquid within a compartment 106 without producing a pressure drop or rise in the compartments 106 when adapting the amount of liquid in the respective compartments 106 .
- the gaseous exchange means 115 are preferably positioned at section of the wall of the compartment 106 that is close to the wall of the drum 102 . During the spinning of the drum 102 this section which is closer to the axial center of the drum 102 will remain free of liquid due to the centrifugal force exerted by the drum 102 . Thus, air can transfer through the gaseous exchange means 115 from within the compartment 106 to the outside or vice versa.
- a first controller 109 is operably connected to the pump 108 and to the optionally present valves 114 .
- the controller can activate or deactivate the pump 108 and can also signal to the pump 108 that it is operating in a normal mode or a reverse mode.
- the first controller 109 is positioned on the drum 102 .
- the washing machine 100 may also contain a second controller 110 configured to determine an imbalance of the drum 102 when the drum 102 is rotating.
- the second controller 110 may also control the pump 108 of the at least one compartment system 105 via the first controller 109 .
- the second controller is usually not affixed to the drum, but may be positioned in another place within the housing and this is not placed on any moving part.
- the imbalance of the drum 102 can be determined by a known system of the art.
- a sensor maybe mounted on a rotation shaft on which the drum 102 rotates for detecting irregularities involved in rotation of the drum 102 .
- a vibration sensor (not illustrated) may be placed on the tub 103 , e.g., a magnetorestrictive sensor or load cell.
- the first controller 109 can thus be operatively connected to sensors configured to determine an imbalance of the drum 102 when the drum 102 is rotating and thus the first controller 109 is configured to determine an imbalance of the drum 102 and control the activation or deactivation of the pump 108 of the compartment system 105 via the first controller 109 , for example, by sending an appropriate signal to the first controller 109 which in turn sends an appropriate signal to the pump 108 and optionally the valves 114 .
- the connection of the first controller 109 with the pump 108 and/or valves 114 is provided by appropriate signaling cables which are fixed to the drum 102 , e.g., parallel to the pipe(s) 107 .
- the second controller 110 may contain a memory comprising a predefined imbalance value, i.e., a threshold value.
- a predefined imbalance value is a measure of the degree of imbalance determined by the second controller 110 and the above described sensors. The imbalance value will depend on the particular imbalance determination system used. For example, in case of the use of a vibrational sensor, a degree of vibration can be determined.
- a predefined imbalance value is a fixed threshold value that defines beginning with which imbalance value the drum 102 is considered to be imbalanced. The imbalance value may be predefined or present in the memory connected to the second controller 110 or may be adapted by the input of a user.
- the second controller 110 can determine whether an imbalance exists by comparing the determined imbalance value with the predefined imbalance value. The determination may only be activated when the rotation of the drum 102 is above a certain rotation threshold, for example, 1000 rotations per minute or any rotation threshold that indicates a spinning mode of the washing machine 100 .
- the second controller 110 can be configured to: determine whether a first imbalance value is above the predefined imbalance value, and then control the pump 108 to transfer liquid from one compartment 106 of the pair of compartments to the second compartment 106 of the pair of compartments 106 . After this step the second controller 110 can perform a further imbalance determination and determine a second imbalance value.
- the second imbalance value is determined after a fixed time period after the determination of the first imbalance value, e.g., 0.5 seconds, 1 second, 1.5 seconds, or up to 10 seconds.
- the imbalance value may be proportional or inverse proportional to the determined imbalance. While the present disclosure describes an imbalance value is proportional to the determined imbalance, it also disclosed that the imbalance value is inverse proportional to the determined imbalance resulting in an reversed relation of the determined imbalance values.
- the pump 108 When determining that the second imbalance value is below the first determined imbalance value, but still not below the predefined imbalance value, the pump 108 is controlled to continue to transfer liquid from the first compartment 106 to the second compartment 106 of the pair of compartments 106 .
- the second controller 110 controls the pump 108 to transfer liquid from the second compartment 106 of the pair of compartments 106 to the first compartment 106 of the pair of compartments 106 , i.e., in the reverse direction. Any valves 114 which are closed and may hinder the transport of liquid may be opened to allow the transfer of liquid.
- a further (third and further) imbalance value can be subsequently determined, which may result in the above described outcomes or in the following outcome:
- the second controller 110 controls the pump 108 to stop transferring liquid. Any valves 114 which are open and may allow the transfer of liquid may be closed to prevent the transfer of further liquid.
- the washing machine 100 comprises a transmitter 111 connected to the second controller 110 and comprises a receiver 112 connected to the first controller 109 , and the second controller 110 is configured to transfer a control signal via the transmitter 111 to the receiver 112 of the first controller 109 wirelessly.
- the washing machine 100 may further comprise a power source on the drum 102 configured to provide electrical energy to the first controller 109 and the at least one compartment system 105 .
- This power source may be a replaceable and/or wirelessly rechargeable, e.g., via inductive charging.
- the washing machine 100 comprises at least two of the compartment systems 105 , preferably two of the compartment systems 105 . All compartments 106 on the drum 102 may be equidistant to each other on the wall of the drum 102 , as illustrated in FIG. 1 , and the first controller 109 may be connected to each pump 108 and/or valve 114 of the compartment systems 105 by appropriate cabling. Alternatively, the washing machine 100 may comprise further first controller 109 s , one for each compartment system 105 .
- the advantage of having two compartment systems 105 consisting of two compartments 106 each is that they will be positioned exactly at 90° to each other with respect to the axis of the drum 102 on the wall of the drum 102 . Thus, the imbalance of the drum 102 may be more efficiently reduced.
- the washing machine 100 comprises more than two compartment systems 105 , e.g. any number between 3-20 to further refine the imbalance control mechanism.
- the procedure for determining a first and further imbalance value followed by the appropriate activation or deactivation of the pump 108 and/or valves 114 for each compartment system 105 may be sequentially for the compartment systems 105 or concurrently until the second or further imbalance value is below the predetermined imbalance value.
- the procedure for controlling the pumps 108 of the respective compartment systems 105 sequentially may be performed by performing the procedure with no time delay between the successive respective procedures for each compartment system 105 .
- each pair of compartments 106 of one compartment system 105 may be connected by a separate pipe 107 and thus each pair of compartments 106 of one compartment system 105 forms a closed liquid circuit.
- all pairs of compartments 106 of one compartment system 105 are connected by a shared pipe 107 connecting all compartments 106 with each other and the entirety of the compartment systems 105 forms a closed liquid circuit.
- liquid may be transferred from one compartment 106 of a first compartment system 105 via another compartment 106 of a second compartment system 105 positioned between the second compartment 106 of the first compartment system 105 while maintaining the amount of liquid in the compartment 106 positioned between by allowing the same amount of liquid to enter and leave the compartment 106 positioned between, by opening the optionally present valves 114 limiting access to the compartment 106 in between and/or activating a pump 108 associated with the compartment 106 in between and belong to a second compartment system 105 .
- the method may further comprise determining S 2 a first imbalance value; when the first imbalance value is above a predefined imbalance value S 3 , controlling S 4 the pump 108 to transfer liquid from one compartment 106 of the pair of compartments 106 to the second compartment 106 of the pair of compartments 106 , and determining S 2 a second imbalance value, wherein when determining that the second imbalance value is below the first imbalance value S 3 and not below the predefined imbalance value, controlling S 4 the pump 108 to continue transferring liquid from one compartment 106 of the pair of compartments 106 to the second compartment 106 of the pair of compartments 106 , wherein when determining S 3 by the second controller 110 that the second imbalance value is above the first imbalance value, controlling S 4 the pump 108 to transfer liquid from the second compartment 106 of the pair of compartments 106 to the first compartment 106 of the pair of compartments 106 , and wherein when determining S 3 by the second controller 110 that the second imbalance value is below the predefined imbalance value, controlling S 5 the pump 108 to stop transferring liquid.
- a balancing system for a washing machine 100 and to a method for operating the balancing system of a washing machine 100 .
- a balancing system for a washing machine 100 and to a method for operating the balancing system of a washing machine 100 is described, wherein a first controller 109 is connected to the pump 108 of the at least one compartment system 105 and for controlling the pump 108 and positioned on the drum 102 , and a second controller 110 is configured to determine an imbalance of the drum 102 when the drum 102 is rotating and control the activation or deactivation of the pump 108 of the at least one compartment system 105 via the first controller 109 .
Abstract
Description
- This application is the U.S. national phase of PCT Application No. PCT/EP2019/057738 filed on Mar. 27, 2019, the disclosure of which is incorporated in its entirety by reference herein.
- The disclosure relates to a balancing system for a washing machine and to a method for operating a balancing system of a washing machine.
- Although applicable to any washing machine comprising a drum, the present disclosure will mainly be described in conjunction with a washing machine comprising a horizontally rotating drum.
- The balancing problem of a washing machine when spinning at high rotational speeds, e.g., during a drying cycle, is one of the most important problems. It is an important criterion that affects the performance of the machine. It is desirable to distribute the laundry in a balanced way in the machine, but this is virtually impossible since the laundry will distribute within the drum in an accidental manner. An unbalanced drum will cause strong vibration if not moving of the washing machine and also produces a lot of noise. Previous solutions to this problem are mainly based on estimations of the imbalance by software and the subsequent correction of this imbalance by various means which may require a relatively high number of trial and error cycles.
- Accordingly, there is a need for an improved balancing system which balances the drum in a relatively short time period.
- The above stated problem is solved by the features of the independent claims. It is understood, that independent claims of a claim category may be formed in analogy to the dependent claims of another claim category.
- Disclosed is a washing machine comprising
-
- a drum wherein laundry is to be placed,
- a tub wherein the drum moves,
- a motor configured to drive the tub,
- at least one compartment system provided on the wall of the drum comprising
- a pair of compartments, said compartments suitable for storing a liquid, the two compartments of the pair of compartments placed centrosymmetrical with respect to the center of the drum on the wall of the drum, and
- a pipe connecting the pair of compartments with each other,
- a pump configured to pump a liquid from one compartment of the pair of compartments to the second compartment of the pair of compartments and vice versa,
- a first controller connected to the pump of the at least one compartment system and for controlling the pump and positioned on the drum,
- a second controller configured to determine an imbalance of the drum when the drum is rotating and control the activation or deactivation of the pump of the at least one compartment system via the first controller.
- The second controller may be configured to:
- determine a first imbalance value;
when the first imbalance value is above a predefined imbalance value, control the pump to transfer liquid from one compartment of the pair of compartments to the second compartment of the pair of compartments, and
determine a second imbalance value,
wherein when determining that the second imbalance value is below the first imbalance value and not below the predefined imbalance value, control the pump to continue transferring liquid from one compartment of the pair of compartments to the second compartment of the pair of compartments,
wherein when determining by the second controller that the second imbalance value is above the first imbalance value, control the pump to transfer liquid from the second compartment of the pair of compartments to the first compartment of the pair of compartments, and
wherein when determining by the second controller that the second imbalance value is below the predefined imbalance value, control the pump to stop transferring liquid. - The washing machine may comprise a transmitter connected to the second controller and comprises a receiver connected to the first controller, and the second controller is configured to transfer a control signal via the transmitter to the receiver of the first controller wirelessly.
- The washing machine may comprise a power source on the drum configured to provide electrical energy to the first controller and the at least one compartment system, wherein the power source is replaceable and/or wirelessly rechargeable.
- The washing machine may comprise at least two of the compartment systems, preferably two of the compartment systems, and all compartments on the drum being equidistant to each other on the wall of the drum and the first controller being connected to each pump of the respective compartment systems.
- Each pair of compartments of one compartment system may be connected by a separate pipe and each pair of compartments of one compartment system may form a closed liquid circuit.
- All compartments of the compartment systems may be connected by a shared pipe connecting all compartments with each other and the entirety of the compartment systems may form a closed liquid circuit.
- Disclosed is also a method for controlling the imbalance of the washing machine as defined above, the method comprising, by the second controller, determining an imbalance of the drum when the drum is rotating,
- controlling the pump of the at least one compartment system via the first controller.
- The method may comprise determining a first imbalance value;
- when the first imbalance value is above a predefined imbalance value, controlling the pump to transfer liquid from one compartment of the pair of compartments to the second compartment of the pair of compartments, and
determining a second imbalance value,
wherein when determining that the second imbalance value is below the first imbalance value and not below the predefined imbalance value, controlling the pump to continue transferring liquid from one compartment of the pair of compartments to the second compartment of the pair of compartments,
wherein when determining by the second controller that the second imbalance value is above the first imbalance value, controlling the pump to transfer liquid from the second compartment of the pair of compartments to the first compartment of the pair of compartments, and
wherein when determining by the second controller that the second imbalance value is below the predefined imbalance value, controlling the pump to stop transferring liquid. - Further embodiments of the present disclosure are subject of the further subclaims and of the following description, referring to the drawings.
- For a more complete understanding of the present disclosure and advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings. The disclosure is explained in more detail below using exemplary embodiments which are specified in the schematic figures of the drawings, in which:
-
FIG. 1 illustrates awashing machine 100 of the present disclosure. -
FIG. 2 illustrates a section of thecompartment system 105 for awashing machine 100 of the present disclosure. -
FIG. 3 illustrates a method for balancing thedrum 102 of awashing machine 100 using thecompartment system 105 of the present disclosure. - In the figures like reference signs denote like elements unless stated otherwise.
- Although specific embodiments have been illustrated and described herein, it will be appreciated by those of ordinary skill in the art that a variety of alternate and/or equivalent implementations exist. It should be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration in any way. Rather, the foregoing summary and detailed description will provide those skilled in the art with a convenient road map for implementing at least one exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope as set forth in the appended claims and their legal equivalents. Generally, this application is intended to cover any adaptations or variations of the specific embodiments discussed herein.
-
FIG. 1 schematically illustrates awashing machine 100 of the present disclosure. Thewashing machine 100 comprises adrum 102, into which laundry is to be placed and atub 103 wherein thedrum 102 moves in rotating fashion. Ahousing 101 of thedrum 102 is also illustrated. The view is a view along the rotational axis of thedrum 102. Thewashing machine 100 can be awashing machine 100 with a horizontally movingdrum 102 or a vertically movingdrum 102, preferably awashing machine 100 with a horizontally movingdrum 102. Thedrum 102 consists of cylindrical wall and a disk-like backside and is open to the front side. Thewashing machine 100 can comprise a lid (not illustrated) reversibly sealing or closing thetub 103 from the exterior of thehousing 101. Thetub 103 is sealed from the inside of thehousing 101 to prevent liquid from flowing into thehousing 101 and connected byconventional tubing 103 to a water inlet and a water outlet (not illustrated). - The
washing machine 100 can also comprise amotor 104 for rotatably moving thedrum 102 via driving means, i.e., a drive, e.g., by a wheel connected to the backside of thedrum 102 and a belt connecting thedrum 102 with a drive of themotor 104. Thedrum 102 may comprise at least one baffle (not illustrated) positioned on the wall, preferably three or five baffles which assist in preventing the laundry from sticking to the inside of the wall of thedrum 102 and assist in creating turbulences in the washing liquid comprising the laundry and thus an improved washing efficiency. - The
washing machine 100 is equipped with acompartment system 105 for reducing the potential imbalance of adrum 102 of thewashing machine 100 as illustrated inFIG. 1 and also in more detail inFIG. 2 . - The
washing machine 100 comprises at least onecompartment system 105. Thecompartment system 105 comprises a pair, i.e., two,compartments 106 suitable for storing a liquid. The twocompartments 106 of the pair ofcompartments 106 placed centrosymmetrical with respect to the center of thedrum 102 on the wall of thedrum 102, i.e., they are positioned on those sections of the wall of thedrum 102 which are opposed to each other. Thecompartments 106 are firmly affixed to thedrum 102 by suitable attachment means, e.g., by welds, screws, etc. Thecompartments 106 can be made of any suitable fluid-tight material, like e.g., metal or plastic. Each of the compartments may be have the same dimensions and especially be configured to house the same volume. - A pipe 107 (or tubing) fluidly couples the two
compartments 106. Thepipe 107 is placed on the wall of thedrum 102 and is firmly affixed to thedrum 102 by suitable attachment means, e.g., by welds, screws, etc. Thus, thepipe 107 is placed circumferentially over the wall of thedrum 102. In this way thepipe 107 is prevented from detaching from thedrum 102 even when thedrum 102 is spinning at high speed. Apipe 107 can be made of any suitable fluid-tight material, like e.g., metal or plastic. - In
FIG. 2 it is illustrated that onecompartment 106 is connected to twopipes 107, however, it also possible that thecompartment 106 is connected to only onepipe 107. - The
compartment system 105 also comprises at least onepump 108 which may be positioned directly at the connection between onecompartment 106 and thepipe 107 or at any section of thepipe 107. Thepump 108 is bidirectional and thus configured to pump 108 liquid from onecompartment 106 of the pair ofcompartments 106 to thesecond compartment 106 of the pair ofcompartments 106 and vice versa, i.e., from thesecond compartment 106 into thefirst compartment 106. - Furthermore, the
compartment system 105 can be equipped withvalves 114 regulating the flow betweencompartments 106 which may be positioned directly at the connection between onecompartment 106 and thepipe 107 or at any section of thepipe 107. Preferably, thevalves 114 are placed at a connection between thecompartment 106 and thepipe 107. Due to thevalves 114 thepump 108 does not prevent the flow of fluid when thepump 108 is turned off and the amount of liquid in thecompartments 106 can be maintained without an activatedpump 108. Each compartment may be sealable from the remainder of the compartment system by twovalves 114. - The
compartment system 105 is a closed circuit with respect to the liquid contained therein. Thus, regularly no liquid is removed from thecompartment system 105 or added. A maintenance valve (not illustrated) which is closed during operation of thewashing machine 100 and provides a connection from thecompartment system 105 to the space outside thecompartment system 105 may be provided. In this way, the liquid may be exchanged, removed or added when required when thewashing machine 100 is not operating. The liquid may be any suitable liquid, that is liquid at room temperature. For example, the liquid may be water, distilled water or/and water containing preservatives. Before operation the pipes may be filled completely with liquid and the liquid in each compartment of thecompartment system 105 may occupy up to 50 vol./vol. % of the volume of eachcompartment 106. - Each
compartment 106 can also comprise a gaseous exchange means 115, e.g., a membrane window 115, which is impermeable to the liquid in thecompartment system 105, but permeable to air. Due to the gaseous exchange means 115 it is possible to modify the amount of liquid within acompartment 106 without producing a pressure drop or rise in thecompartments 106 when adapting the amount of liquid in the respective compartments 106. - The gaseous exchange means 115 are preferably positioned at section of the wall of the
compartment 106 that is close to the wall of thedrum 102. During the spinning of thedrum 102 this section which is closer to the axial center of thedrum 102 will remain free of liquid due to the centrifugal force exerted by thedrum 102. Thus, air can transfer through the gaseous exchange means 115 from within thecompartment 106 to the outside or vice versa. - Furthermore, a
first controller 109 is operably connected to thepump 108 and to the optionallypresent valves 114. The controller can activate or deactivate thepump 108 and can also signal to thepump 108 that it is operating in a normal mode or a reverse mode. Thefirst controller 109 is positioned on thedrum 102. - The
washing machine 100 may also contain asecond controller 110 configured to determine an imbalance of thedrum 102 when thedrum 102 is rotating. Thesecond controller 110 may also control thepump 108 of the at least onecompartment system 105 via thefirst controller 109. The second controller is usually not affixed to the drum, but may be positioned in another place within the housing and this is not placed on any moving part. - The imbalance of the
drum 102 can be determined by a known system of the art. For example, a sensor maybe mounted on a rotation shaft on which thedrum 102 rotates for detecting irregularities involved in rotation of thedrum 102. Alternatively or in addition, a vibration sensor (not illustrated) may be placed on thetub 103, e.g., a magnetorestrictive sensor or load cell. - The
first controller 109 can thus be operatively connected to sensors configured to determine an imbalance of thedrum 102 when thedrum 102 is rotating and thus thefirst controller 109 is configured to determine an imbalance of thedrum 102 and control the activation or deactivation of thepump 108 of thecompartment system 105 via thefirst controller 109, for example, by sending an appropriate signal to thefirst controller 109 which in turn sends an appropriate signal to thepump 108 and optionally thevalves 114. The connection of thefirst controller 109 with thepump 108 and/orvalves 114 is provided by appropriate signaling cables which are fixed to thedrum 102, e.g., parallel to the pipe(s) 107. - In particular, the
second controller 110 may contain a memory comprising a predefined imbalance value, i.e., a threshold value. An imbalance value is a measure of the degree of imbalance determined by thesecond controller 110 and the above described sensors. The imbalance value will depend on the particular imbalance determination system used. For example, in case of the use of a vibrational sensor, a degree of vibration can be determined. A predefined imbalance value is a fixed threshold value that defines beginning with which imbalance value thedrum 102 is considered to be imbalanced. The imbalance value may be predefined or present in the memory connected to thesecond controller 110 or may be adapted by the input of a user. - When the
drum 102 is rotating thesecond controller 110 can determine whether an imbalance exists by comparing the determined imbalance value with the predefined imbalance value. The determination may only be activated when the rotation of thedrum 102 is above a certain rotation threshold, for example, 1000 rotations per minute or any rotation threshold that indicates a spinning mode of thewashing machine 100. - The
second controller 110 can be configured to: determine whether a first imbalance value is above the predefined imbalance value, and then control thepump 108 to transfer liquid from onecompartment 106 of the pair of compartments to thesecond compartment 106 of the pair ofcompartments 106. After this step thesecond controller 110 can perform a further imbalance determination and determine a second imbalance value. The second imbalance value is determined after a fixed time period after the determination of the first imbalance value, e.g., 0.5 seconds, 1 second, 1.5 seconds, or up to 10 seconds. The imbalance value may be proportional or inverse proportional to the determined imbalance. While the present disclosure describes an imbalance value is proportional to the determined imbalance, it also disclosed that the imbalance value is inverse proportional to the determined imbalance resulting in an reversed relation of the determined imbalance values. - Dependent on the determined imbalance value different consequences are foreseen:
- When determining that the second imbalance value is below the first determined imbalance value, but still not below the predefined imbalance value, the
pump 108 is controlled to continue to transfer liquid from thefirst compartment 106 to thesecond compartment 106 of the pair ofcompartments 106. - Alternatively, when determining by the
second controller 110 that the second imbalance value is above the first imbalance value, i.e., the imbalance of thedrum 102 has further deteriorated, thesecond controller 110 controls thepump 108 to transfer liquid from thesecond compartment 106 of the pair ofcompartments 106 to thefirst compartment 106 of the pair ofcompartments 106, i.e., in the reverse direction. Anyvalves 114 which are closed and may hinder the transport of liquid may be opened to allow the transfer of liquid. - A further (third and further) imbalance value can be subsequently determined, which may result in the above described outcomes or in the following outcome:
- When determining by the
second controller 110 that the second imbalance value is below the predefined imbalance value, i.e., the imbalance is now in an acceptable range, thesecond controller 110 controls thepump 108 to stop transferring liquid. Anyvalves 114 which are open and may allow the transfer of liquid may be closed to prevent the transfer of further liquid. - Preferably, the
washing machine 100 comprises atransmitter 111 connected to thesecond controller 110 and comprises areceiver 112 connected to thefirst controller 109, and thesecond controller 110 is configured to transfer a control signal via thetransmitter 111 to thereceiver 112 of thefirst controller 109 wirelessly. - The
washing machine 100 may further comprise a power source on thedrum 102 configured to provide electrical energy to thefirst controller 109 and the at least onecompartment system 105. This power source may be a replaceable and/or wirelessly rechargeable, e.g., via inductive charging. - In a preferred aspect of the disclosure, the
washing machine 100 comprises at least two of thecompartment systems 105, preferably two of thecompartment systems 105. Allcompartments 106 on thedrum 102 may be equidistant to each other on the wall of thedrum 102, as illustrated inFIG. 1 , and thefirst controller 109 may be connected to eachpump 108 and/orvalve 114 of thecompartment systems 105 by appropriate cabling. Alternatively, thewashing machine 100 may comprise further first controller 109 s, one for eachcompartment system 105. The advantage of having twocompartment systems 105 consisting of twocompartments 106 each is that they will be positioned exactly at 90° to each other with respect to the axis of thedrum 102 on the wall of thedrum 102. Thus, the imbalance of thedrum 102 may be more efficiently reduced. However, it also considered that thewashing machine 100 comprises more than twocompartment systems 105, e.g. any number between 3-20 to further refine the imbalance control mechanism. - When the
washing machine 100 comprises more than twocompartment systems 105 the procedure for determining a first and further imbalance value followed by the appropriate activation or deactivation of thepump 108 and/orvalves 114 for eachcompartment system 105 may be sequentially for thecompartment systems 105 or concurrently until the second or further imbalance value is below the predetermined imbalance value. The procedure for controlling thepumps 108 of therespective compartment systems 105 sequentially may be performed by performing the procedure with no time delay between the successive respective procedures for eachcompartment system 105. - When the
washing machine 100 comprises more than twocompartment systems 105 each pair ofcompartments 106 of onecompartment system 105 may be connected by aseparate pipe 107 and thus each pair ofcompartments 106 of onecompartment system 105 forms a closed liquid circuit. - Alternatively, all pairs of
compartments 106 of onecompartment system 105 are connected by a sharedpipe 107 connecting allcompartments 106 with each other and the entirety of thecompartment systems 105 forms a closed liquid circuit. By suitably activating and deactivating of thepumps 108 and/or opening/closing of thevalves 114 in the closed circuit, liquid may be transferred from onecompartment 106 of afirst compartment system 105 via anothercompartment 106 of asecond compartment system 105 positioned between thesecond compartment 106 of thefirst compartment system 105 while maintaining the amount of liquid in thecompartment 106 positioned between by allowing the same amount of liquid to enter and leave thecompartment 106 positioned between, by opening the optionallypresent valves 114 limiting access to thecompartment 106 in between and/or activating apump 108 associated with thecompartment 106 in between and belong to asecond compartment system 105. - Disclosed is also a method for controlling the imbalance of the
washing machine 100 as defined above and illustrated inFIG. 3 , the method comprising starting a determination S1 by thesecond controller 110, determining S2 an imbalance of thedrum 102 when thedrum 102 is rotating, controlling S4 thepump 108 of the at least onecompartment system 105 via thefirst controller 109. - The method may further comprise determining S2 a first imbalance value; when the first imbalance value is above a predefined imbalance value S3, controlling S4 the
pump 108 to transfer liquid from onecompartment 106 of the pair ofcompartments 106 to thesecond compartment 106 of the pair ofcompartments 106, and determining S2 a second imbalance value, wherein when determining that the second imbalance value is below the first imbalance value S3 and not below the predefined imbalance value, controlling S4 thepump 108 to continue transferring liquid from onecompartment 106 of the pair ofcompartments 106 to thesecond compartment 106 of the pair ofcompartments 106, wherein when determining S3 by thesecond controller 110 that the second imbalance value is above the first imbalance value, controlling S4 thepump 108 to transfer liquid from thesecond compartment 106 of the pair ofcompartments 106 to thefirst compartment 106 of the pair ofcompartments 106, and wherein when determining S3 by thesecond controller 110 that the second imbalance value is below the predefined imbalance value, controlling S5 thepump 108 to stop transferring liquid. - Provided is a balancing system for a
washing machine 100 and to a method for operating the balancing system of awashing machine 100. - A balancing system for a
washing machine 100 and to a method for operating the balancing system of awashing machine 100 is described, wherein afirst controller 109 is connected to thepump 108 of the at least onecompartment system 105 and for controlling thepump 108 and positioned on thedrum 102, and asecond controller 110 is configured to determine an imbalance of thedrum 102 when thedrum 102 is rotating and control the activation or deactivation of thepump 108 of the at least onecompartment system 105 via thefirst controller 109. -
- 100 Washing machine
- 101 Housing
- 102 Drum
- 103 Tub
- 104 Motor
- 105 Compartment system
- 106 Compartment
- 107 Pipe
- 108 Pump
- 109 First controller
- 110 Second controller
- 111 Transmitter
- 112 Receiver
- 113 Drive
- 114 Valve 114(s)
- 115 Gaseous exchange means
- S1-S5 Method steps
Claims (9)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2019/057738 WO2020192907A1 (en) | 2019-03-27 | 2019-03-27 | Balancing system for a washing machine |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220162791A1 true US20220162791A1 (en) | 2022-05-26 |
Family
ID=66041451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/598,603 Abandoned US20220162791A1 (en) | 2019-03-27 | 2019-03-27 | Balancing system for a washing machine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20220162791A1 (en) |
EP (1) | EP3947803A1 (en) |
JP (1) | JP2022532017A (en) |
KR (1) | KR20210135334A (en) |
CN (1) | CN113614304A (en) |
WO (1) | WO2020192907A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11814767B2 (en) | 2018-05-31 | 2023-11-14 | Whirlpool Corporation | Laundry treating appliance having a liquid distribution assembly |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114737362B (en) * | 2022-04-29 | 2023-03-21 | 珠海格力电器股份有限公司 | Counterweight assembly, drum assembly, balance regulating method of drum assembly and drum type washing machine |
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Also Published As
Publication number | Publication date |
---|---|
JP2022532017A (en) | 2022-07-13 |
CN113614304A (en) | 2021-11-05 |
KR20210135334A (en) | 2021-11-12 |
EP3947803A1 (en) | 2022-02-09 |
WO2020192907A1 (en) | 2020-10-01 |
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