EP3907320A1 - Pumpeinrichtung für einen waschvollautomaten - Google Patents

Pumpeinrichtung für einen waschvollautomaten Download PDF

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Publication number
EP3907320A1
EP3907320A1 EP21164304.4A EP21164304A EP3907320A1 EP 3907320 A1 EP3907320 A1 EP 3907320A1 EP 21164304 A EP21164304 A EP 21164304A EP 3907320 A1 EP3907320 A1 EP 3907320A1
Authority
EP
European Patent Office
Prior art keywords
pump
valve
shaft
motor
rotation
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.)
Withdrawn
Application number
EP21164304.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Roland Meyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PAS Deutschland GmbH
Original Assignee
PAS Deutschland GmbH
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 PAS Deutschland GmbH filed Critical PAS Deutschland GmbH
Publication of EP3907320A1 publication Critical patent/EP3907320A1/de
Withdrawn legal-status Critical Current

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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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • D06F39/022—Devices for adding soap or other washing agents in a liquid state

Definitions

  • the invention relates to a pump device for a fully automatic washing machine, having a motor, a gear arrangement coupled to a shaft of the motor, and a pump that can be driven by means of the motor.
  • Such a pump device is used in fully automatic washing machines which have several containers for storing liquids which the corresponding fully automatic washing machine automatically flushes into a drum of the fully automatic washing machine during a washing process.
  • the liquids can be detergents, washing aids (e.g. fabric softener) or other additives for washing water, such as disinfectants.
  • the function of the pumping device consists essentially in an at least approximately controlled amount of the from a control device of the washing machine
  • the selected liquid can be removed from the appropriate container and added to the washing water.
  • the invention described here is based on the object of providing a simplified pumping device which can also be controlled in a simple manner.
  • a pump device of the type mentioned at the beginning which has a valve device which can be adjusted by means of the motor for optionally connecting one of several connections of the pump device to the pump, the gear arrangement being designed to be dependent on a direction of rotation of the shaft of the motor either to couple the same with the valve device for adjusting the valve device or to avoid the adjustment of the valve device as a result of a rotation of the shaft.
  • the motor can therefore both drive the pump and also adjust the valve device, so it is both a drive for the pump and an adjusting device for the valve device.
  • the transmission device ensures that the valve device can only be adjusted in a certain direction when the shaft is rotated.
  • valve device If the valve device is not to be adjusted and only the pump is to be driven, the motor can be controlled in such a way that the shaft does not rotate in this specific direction. Then only the pump is driven, but the adjustment of the valve device is avoided.
  • the individual connections of the pumping device can be assigned to the containers mentioned at the outset.
  • the direction of rotation-dependent coupling of the valve device to the motor can be achieved in that the gear arrangement has a first freewheel associated with the valve device, which is designed to transmit the torque from the shaft to the valve device in a first direction of rotation of the shaft.
  • the gear arrangement has a backstop which is located on a side of the first freewheel facing away from the motor is arranged.
  • the backstop provides additional protection against unintentional adjustment of the valve device when the shaft rotates in the direction in which the adjustment is prevented.
  • the gear arrangement has a second freewheel associated with the pump, which is used to transmit a torque is formed from the shaft to the pump in a second direction of rotation of the shaft, the second direction of rotation being opposite to the first direction of rotation.
  • the gear arrangement is designed to couple the same either with the pump device for driving the pump device or with the valve device for adjusting the valve device depending on a direction of rotation of the shaft of the motor.
  • the valve device has a first valve element with a first opening and a second valve element with a plurality of second openings arranged around an axis of the valve device, the two valve elements being rotatable around the axis in such a way that the first opening of the first valve element optionally a second opening of the second valve element overlaps so that liquid can pass through the two openings.
  • every second opening can be connected to a connection of the pump device, for example via a line or tube.
  • a simple and compact construction of the valve device results when the two valve elements are overall circular disk-shaped and are arranged on the axis of the valve device.
  • the two disc-shaped valve elements are preferably located directly opposite one another. They can be pressed against one another to generate a force, for example with the aid of a spring or other preferably elastically deformable means (rubber, leaf spring, which can for example be molded into a plastic part, etc.).
  • the two opposite openings of the valve elements form a connection for the liquid between the selected connection and the Pump, preferably a suction side of the pump. A good tightness of this connection is achieved by pressing the two valve elements together.
  • the valve device has a drive gear which is arranged concentrically with the axis, and the first freewheel is arranged between the drive gear and a valve element, preferably the first valve element.
  • the valve device has an angle encoder for detecting an angle of rotation of the first valve element relative to the second valve element with respect to the axis having. It can be provided here that at least one specific angle, which corresponds to a selection of a specific connection, is directly recognizable. Furthermore, it can be provided that a reference angle is directly recognizable as such. Direct recognizability is to be understood as meaning that the angle transmitter is designed in such a way that it generates a specific signal or outputs a specific value if the valve elements have the specific position / adjustment angle relative to one another. If the relative position, for example in the case of the disc-shaped valve elements, corresponds to an adjustment angle, then adjustment angles that correspond to a selection of a specific connection can each be recognizable.
  • the angle encoder has an encoder wheel, on the edge of which there is at least one marking that can be detected by means of a sensor device of the angle encoder.
  • the marking can be, for example, a notch on the edge of the encoder wheel, which can be detected by a sensor device implemented as a light barrier, in particular a fork light barrier.
  • the marking can be arranged in such a way that it activates the sensor device when the valve device is set so that an output is selected.
  • the number of marks can correspond to the number of outputs.
  • a further sensor element and a further marking can be provided for recognizing the reference position or the reference angle.
  • the pump can be a piston pump. If the rotational speed of the shaft can at least approximately be determined or estimated, then the amount of liquid conveyed by means of the pump can be deduced from the operating time of the motor, whereby dosing of the liquid selected in each case is achieved with good accuracy.
  • the connections can be arranged on the input side of the pump device.
  • the plurality of connections can be inputs of the pump device, one of which can optionally be connected to a suction side of the pump by means of the valve device and a pressure side of the pump forms an output of the pump device.
  • the individual inputs can then be connected to the respective containers.
  • a container assembly is provided which has a plurality of containers arranged next to one another, each container having an opening.
  • the pumping device can then be connected, in particular attached, to the container assembly in such a way that the connections protrude into the respective openings, so that liquid can be removed from the respectively selected container by means of the pump unit.
  • a connection can be designed as an inlet for tap water in order to enable the pumping device to be rinsed for cleaning purposes.
  • a fully automatic washing machine 11 which has a metering unit 13 with the aid of which, in particular, liquid detergent, fabric softener or other liquid substances (hereinafter referred to as “liquid” for short) can be fed to a washing process in a metered manner.
  • the metering unit 13 has a pump device 15 which has a valve device 17 which can be connected to a pump 21 for the optional connection of one or more connections 19 of the pump device 15.
  • the connections form inputs 19 of the valve device 17, which is located upstream of the pump 21 with respect to a direction of flow of liquid.
  • An outlet 23 of the pump device 15 is arranged on a pressure side 24 of the pump 21.
  • the pump device 15 shown here has a total of four inlets 19, 19a. Three of these inlets are each connected to a container 25 for liquids. In the embodiment shown, two of these containers 25 are provided for receiving liquid detergent and the third container 25 is provided for receiving fabric softener. At least one container 25 can have a level indicator 26.
  • the fourth inlet 19a is connected to a fresh water line 20 so that fresh water can also be fed to the pumping device 15 if required.
  • the fresh water supply via the inlet 19a serves, for example, to rinse parts of the pump device 15, in particular the pump 21, with fresh water and thus to remove detergent or fabric softener residues.
  • the inlet 19a which is connected to the fresh water line 20, is not present.
  • the number of inputs 19, 19a can be varied in further embodiments.
  • the number of containers 25 can differ from three.
  • a further container 27 can be provided downstream with respect to the pump device 15, as provided in the embodiment shown.
  • This container can be designed to hold powdered detergent or the like and can be arranged in front of a drum 31 of the fully automatic washing machine 11 in the direction of flow.
  • the fresh water line 20 can be connected in the usual way to a water line network 30 via a first inlet valve 29a.
  • the first inlet valve 29a belongs to a multiple valve unit 29 with a total of three inlet valves 29a, 29b, 29c.
  • a second inlet valve 29b of the multiple valve unit 29 is assigned to the further container 27.
  • the second inlet valve 29b is arranged between the water supply network 30 and the further container 27, so that detergent powder located in the further container 27 can be washed into the drum 31.
  • a third inlet valve 29c of the multiple valve unit 29 is connected between the water pipe network 39 and the drum 31 and enables the drum to be quickly filled with water.
  • the inlet valves can be actuated electrically and are preferably designed as solenoid valves.
  • the pump unit 15 can be integrated in a housing, wherein the inlets 19 which are to be connected to the containers 25 can be arranged next to one another and at a relatively large distance from the outlet 23, so that the pump device 15 is directly connected to a container assembly, which has the three containers 25 (not shown) can be grown.
  • the inlets 19 can each have a sleeve-shaped section which protrudes into an opening of the respective container 25 of the attached container assembly.
  • the pumping device 15 has a motor 33 which is coupled to a gear arrangement 35 of the pumping device 15.
  • the motor 33 is a direct current motor. In other embodiments, instead of the simple direct current motor 33, a stepping motor can also be provided.
  • the gear arrangement 35 has gears 39, one of the gears 39 being arranged directly on a shaft 37 of the motor 33.
  • the pump 21 is likewise driven by the shaft 37 of the motor 33.
  • the pump 21 is a piston pump with a piston 43 which can be moved back and forth by means of an actuating element 44 which is arranged eccentrically with respect to the shaft 37.
  • the pump 21 can also be implemented in other ways, for example as one Centrifugal pump.
  • a speed of the shaft 37 is known at least approximately, a delivery rate of the pump 21 can be estimated comparatively well. Consequently, when using a piston pump, an amount of detergent or fabric softener or the like can be dosed relatively precisely.
  • the pump 21 can also be implemented as a peristaltic pump. Similar to a piston pump, with a peristaltic pump a relatively precise metering of the liquid can be achieved if the speed of the shaft is known with sufficient accuracy.
  • the gear 39 of the shaft 37 drives a further gear 39 of the valve device 17 when the motor 33 is activated.
  • a first freewheel 49 of the gear arrangement 35 is set up in such a way that the gear arrangement 35 transmits a torque from the shaft 37 to the valve device 17 when the shaft 37 rotates in a first direction of rotation.
  • a first valve element 51 which is generally in the form of a circular disk, can be driven via the first freewheel 49, so that it rotates about an axis 59 of the valve device 17.
  • a backstop 50 is provided which prevents the first valve element 51 from rotating when the shaft 37 is driven by the motor 33 in a second direction of rotation, which is opposite to the first direction of rotation.
  • the first valve element 51 has a first opening 53 which is offset in the radial direction with respect to the axis 59.
  • a second valve element 55 of the valve device 17 is also designed in the form of a disk and is arranged along the axis 59 next to the first valve element 51.
  • the second valve element 55 has a plurality of second openings 57, which are also offset radially with respect to the axis 59.
  • the openings 53, 57 can be bores in the respective valve elements 51, 55, which have essentially the same diameter and are at the same distance from the axis 59.
  • the number of second openings 57 corresponds to the number of connections or inputs 19 of the pump device 15. Furthermore, the second openings 57 are connected to the inputs 19, 19a via suitable lines.
  • the first opening 53 is connected to a suction side 58 of the pump 21, likewise with a suitable line.
  • the two valve elements 51, 55 can be driven via the motor 33, rotatable relative to each other about the axis 59, so that optionally a second opening 57 lies opposite the first opening 53, so that the input 19, 19a assigned to the respective second opening 57 is hydraulically connected to the suction side 58.
  • a spring 60 is provided (see Fig. 4 ), which presses the two valve elements 51, 55 against each other.
  • the second valve element 55 is expediently firmly connected to the rest of the pump device, in particular its housing parts and connections 19, 19a, whereas the first valve element 51 is rotatably mounted about the axis 59. Adjusting the valve device 17 thus corresponds to rotating the first valve element 51 about the axis 59.
  • the valve device 17 has an angle sensor 61 which can detect an angle of rotation with respect to the axis 59 of the first valve element 51 with respect to the second valve element 57.
  • the angle sensor includes fork light barriers 63 as well as a sensor wheel with notches 65 which is connected to the first valve element in a rotationally fixed manner and which can be detected by means of the light barriers 63.
  • the sensor wheel and the first valve element 51 are one and the same component.
  • the angle encoder 61 can also be designed in other ways. Instead of the light barriers 63, other types of sensors such as Hall sensors or mechanical switches can be provided.
  • the notches 65 are arranged in such a way that one of the light barriers 63 is always activated when two openings 53, 57 are opposite one another. Since four second openings 57 are provided here, which are offset by an angle of 90 ° with respect to the axis 59, markings 65 offset by 90 ° are provided in a corresponding manner. In addition, a further marking 65a is provided which interacts with a further light barrier 63 in order to be able to detect an absolute angle of rotation value. In particular, it is provided that there is exactly one angle of rotation of the first valve element 51 for which both light barriers 63 are activated.
  • the angle sensor 61 is thus designed such that with its help the presence of at least one specific angle of rotation of the two valve elements with respect to one another can be recognized.
  • the angles can be seen that the selection of a certain input 19, 19a correspond, that is, the angles at which the first opening of a second opening 57 is opposite.
  • four predetermined angles can be seen. One of these predetermined angles can be recognized as a reference angle with the further light barrier 63.
  • the motor 33 is energized in such a way that its shaft 37 moves in the first direction of rotation and the first freewheel 49 drives the first valve element 51.
  • the first valve element 51 can be rotated until both light barriers 63 are activated.
  • a certain reference angle is then set. At this reference angle, a specific second opening 57 is connected to the first opening 53 and thus a specific input 19, 19a is connected to the suction side 58 of the pump 21. If another input 19 is to be connected to the suction side 58, the first valve device 51 is driven further and at the same time the notches 53 are counted by means of one of the light barriers 63.
  • the gear arrangement 35 has a second freewheel 67 which is designed such that the pump 21 can be driven by means of the motor 33 when the shaft 37 of the motor 33 rotates in the second direction of rotation.
  • the first freewheel 49 and / or the second freewheel 67 can have drivers 69 and stop surfaces 71 which only interact to transmit a torque when the shaft 67 rotates in the first or second direction of rotation.
  • the motor 33 is controlled in such a way that its shaft 37 rotates in the second direction of rotation, the first freewheel 49 does not pass any significant torque on to the first valve element 51.
  • the backstop 50 assigned to the first valve element 51 prevents the first valve element 51 from rotating when the shaft 37 is driven in the second direction of rotation.
  • the second freewheel 67 transmits a torque to the pump 21, so that the piston 43 moves back and forth and liquid is transported from the container 25 selected by means of the valve device 17 to the outlet 23.
  • an operating current of the motor 33 is detected and, on the basis of the detected operating current, it is checked whether the pump is due to contamination, for example stiff or the motor 33 is even completely blocked.
  • the operating current exceeds a certain threshold value, which can be recognized. If the sluggishness or blockage is recognized on the basis of a comparison of the operating current with the threshold value, then a flushing process of the pump device 15 can be initiated or carried out. During the flushing process, as described above, fresh water is passed through the pumping device 15 via the fourth inlet 19a.
  • a dosing unit 13 can be implemented by means of the pump device 15 shown here, with which an input 19 can be selected in a simple manner, via which the liquid is to be conveyed into the drum 31.
  • a single drive motor 33 is sufficient to both drive the pump 21 and set the valve device 17.
  • the gear arrangement 35 is designed in such a way that the valve device 17 is only adjusted when the shaft 37 rotates in the first direction of rotation.
  • the gear arrangement is preferably also set up to drive the pump 21 only when the shaft 37 is rotating in the second direction of rotation. In this way, the pump is prevented from being actuated while the valve device is being adjusted.
  • the motor 33, together with the gear arrangement 35 thus forms a combined drive and adjustment device for the pump 21 or the valve device 17.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP21164304.4A 2020-05-08 2021-03-23 Pumpeinrichtung für einen waschvollautomaten Withdrawn EP3907320A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202020102614.3U DE202020102614U1 (de) 2020-05-08 2020-05-08 Pumpeinrichtung für einen Waschvollautomaten

Publications (1)

Publication Number Publication Date
EP3907320A1 true EP3907320A1 (de) 2021-11-10

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ID=75223037

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Application Number Title Priority Date Filing Date
EP21164304.4A Withdrawn EP3907320A1 (de) 2020-05-08 2021-03-23 Pumpeinrichtung für einen waschvollautomaten

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EP (1) EP3907320A1 (zh)
CN (1) CN216193469U (zh)
DE (1) DE202020102614U1 (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984210A (en) * 1960-05-06 1965-02-24 Holzer Walter Improvements in and relating to liquid dispensing apparatus
DE102007037883A1 (de) * 2007-08-10 2009-02-12 BSH Bosch und Siemens Hausgeräte GmbH Mehrfachzugabeventil für eine Anlage zum Dosieren flüssigen oder pastösen Waschhilfsmitteln und Verfahren zum Betreiben des Mehrfachzugabeventils
WO2014180022A1 (zh) * 2013-05-07 2014-11-13 无锡小天鹅股份有限公司 洗衣机及其洗涤剂投放组件
CN104452196A (zh) * 2013-09-12 2015-03-25 海尔集团公司 洗涤剂自动添加装置及洗涤装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015216580B3 (de) 2015-08-31 2016-11-10 BSH Hausgeräte GmbH Haushaltsgerät mit einer Pumpvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984210A (en) * 1960-05-06 1965-02-24 Holzer Walter Improvements in and relating to liquid dispensing apparatus
DE102007037883A1 (de) * 2007-08-10 2009-02-12 BSH Bosch und Siemens Hausgeräte GmbH Mehrfachzugabeventil für eine Anlage zum Dosieren flüssigen oder pastösen Waschhilfsmitteln und Verfahren zum Betreiben des Mehrfachzugabeventils
WO2014180022A1 (zh) * 2013-05-07 2014-11-13 无锡小天鹅股份有限公司 洗衣机及其洗涤剂投放组件
CN104452196A (zh) * 2013-09-12 2015-03-25 海尔集团公司 洗涤剂自动添加装置及洗涤装置

Also Published As

Publication number Publication date
CN216193469U (zh) 2022-04-05
DE202020102614U1 (de) 2021-08-11

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