US20220175212A1 - Dosing of a solid detergent in a domestic dishwashing machine - Google Patents

Dosing of a solid detergent in a domestic dishwashing machine Download PDF

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Publication number
US20220175212A1
US20220175212A1 US17/542,657 US202117542657A US2022175212A1 US 20220175212 A1 US20220175212 A1 US 20220175212A1 US 202117542657 A US202117542657 A US 202117542657A US 2022175212 A1 US2022175212 A1 US 2022175212A1
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United States
Prior art keywords
chute
detergent
magazine
shut
rotor
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Abandoned
Application number
US17/542,657
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English (en)
Inventor
Albert Dirnberger
Johann Kleber
Matthias Bauer
Georg Spiessl
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emz Hanauer GmbH and Co KGaA
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emz Hanauer GmbH and Co KGaA
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Assigned to EMZ-HANAUER GMBH & CO. KGAA reassignment EMZ-HANAUER GMBH & CO. KGAA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SPIESSL, GEORG, BAUER, MATTHIAS, KLEBER, JOHANN, DIRNBERGER, ALBERT
Publication of US20220175212A1 publication Critical patent/US20220175212A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4463—Multi-dose dispensing arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4436—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of a detergent solution made by gradually dissolving a powder detergent cake or a solid detergent block
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/449—Metering controlling devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4251—Details of the casing
    • A47L15/4257—Details of the loading door
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/02—Consumable products information, e.g. information on detergent, rinsing aid or salt; Dispensing device information, e.g. information on the type, e.g. detachable, or status of the device
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/34—Other automatic detections
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/07—Consumable products, e.g. detergent, rinse aids or salt
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/12—Air blowers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/26—Indication or alarm to the controlling device or to the user
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/36—Other output

Definitions

  • the present disclosure relates generally to the dosing of a solid detergent in a domestic dishwashing machine.
  • Detergent tablets are particularly easy for a user to handle. If the user is required to introduce a detergent powder into a magazine of a powder dosing unit, it can easily happen that the user spills some of the detergent powder. Such inconveniences are generally not to be feared with detergent tablets. However, in particular in the case of detergent tablets which do not have a spherical, oval or disk-like shape, it is generally necessary to store the detergent tablets in an ordered manner in the magazine in order to reliably be able to remove a defined number of detergent tablets (generally one tablet per operating cycle) during operation of the dishwashing machine. Magazines for the ordered storage of detergent tablets can form, for example, one or more stacking chutes in which the detergent tablets can be stored stacked one above the other (see e.g. DE 10 2019 009 054 A1).
  • annular magazine which allows detergent tablets or specifically measured portions of a detergent powder to be stored in an annular arrangement.
  • the publications WO 2009/022223 A1 and CN 111743495 A mentioned at the beginning disclose annular magazine solutions having a plurality of storage compartments distributed along a ring, in each of which a detergent tablet or powder portion can be stored. According to WO 2009/022223 A1, the detergent contained in a storage compartment is gradually washed out of the storage compartment by a jet of water.
  • CN 111743495 A provides a slider for pushing the detergent tablet held ready in a storage compartment laterally out of the storage compartment. The slider causes a considerable additional outlay in terms of construction and control.
  • the invention provides a domestic dishwashing machine, wherein the dishwashing machine comprises a dishwashing container, a door, mounted on the dishwashing container so as to be pivotable about a horizontal door pivot axis close to the floor, for closing a dishwashing chamber formed in the dishwashing container, and a dosing system, arranged at the door, for a solid detergent.
  • the dosing system comprises: a rotor arranged in a magazine chamber so as to be rotatable about a rotor axis, which rotor delimits a plurality of radially outwardly open storage compartments, distributed in the circumferential direction about the rotor axis, which are each to receive a portion of a solid detergent; a dosing opening in a boundary wall of the magazine chamber, wherein, by rotation of the rotor, each of the storage compartments can be brought individually in succession into a position radially opposite the dosing opening in order to empty the storage compartment in question through the dosing opening; and a chute connected to the magazine chamber through the dosing opening.
  • the rotor is arranged with its rotation plane substantially parallel to a main plane of the door, wherein the dosing opening is arranged beneath the rotor, such that, when the door is closed and when one of the storage compartments is moved into a position radially opposite the dosing opening, a portion of the solid detergent stored in the storage compartment in question is able to fall, solely by the force of gravity, out of the storage compartment in question through the dosing opening and into the chute.
  • the rotor it is sufficient to rotate the rotor into a position in which one of the storage compartments is in a position radially opposite the dosing opening.
  • the portion of the solid detergent located therein is able to fall radially out of the storage compartment and fall through the dosing opening into the chute solely by the force of gravity.
  • the storage compartment does not have to be washed out by means of a jet of water, nor is it necessary to push the portion of solid detergent laterally (horizontally) out of the storage compartment by means of an additional pusher.
  • the dosing opening can be formed, for example, in a chamber boundary wall of the magazine chamber which is formed by the chamber housing and encloses the rotor in an annular manner.
  • the rotor is installed in the door with its rotation plane substantially parallel to the main plane of the door, wherein the chute adjoins the magazine chamber beneath the magazine chamber.
  • the positional term beneath thereby refers to the state when the door is closed.
  • the door is mounted on a dishwashing container of the dishwashing machine so as to be pivotable about a horizontal pivot axis close to the floor.
  • the closed door therefore has a vertical orientation; for opening, the door is pivoted in the direction of the horizontal.
  • the chute is therefore to be arranged beneath the rotor in the direction towards the pivot axis close to the floor.
  • the solid detergent can be present as a pourable powder or in tablet form.
  • Such detergent tablets are conventionally brought into a defined spatial form by compaction from one or more powdered starting substances (with in some cases different active substance compositions).
  • An approximately quadrangular form of the detergent tablets is frequently to be found, in which the detergent tablets, looking at their large face, have an approximately rectangular contour and a length and width, looking at their large face, greater than the thickness, looking at their small face.
  • the invention is of course not limited to such quadrangular detergent tablets; the use of detergent tablets of other shapes is likewise conceivable within the scope of the present disclosure.
  • a portion of the solid detergent the portion consists in the case of detergent tablets of a defined number of such detergent tablets, for example a single detergent tablet.
  • a portion consists of the amount of powder introduced into the storage compartment in question.
  • This amount can be specifically measured, in particular when the magazine has been filled with detergent by the manufacturer, or it can be an amount determined by visual judgment, for example when it has been introduced manually by a consumer by way of a first filling or refilling.
  • the chute defines a fall section, which extends in particular substantially linearly downwards from the dosing opening to an outlet opening, for the free fall of a portion of the solid detergent in the chute, wherein the chute opens at the outlet opening from the door into the dishwashing chamber.
  • the portion of the solid detergent removed from the magazine is able to fall through the dosing opening and through the entire chute as far as the outlet opening and out of the outlet opening without additional aids, solely under the effect of gravity. After leaving the outlet opening, the portion of the solid detergent can be taken up and dissolved by the dishwashing water sprayed or collected in the dishwashing chamber.
  • the chute is arranged so as to be unmovable relative to the dosing opening.
  • the dosing system comprises a common housing component which delimits at least parts of the magazine chamber and at the same time at least parts of the chute.
  • the dosing system comprises a drive mechanism for driving the rotor in rotation such that its direction of rotation can be changed.
  • a control unit is provided which is adapted to control the drive mechanism with a changing direction of rotation of the rotor.
  • Changing the direction of rotation of the rotor can serve various purposes.
  • a detergent tablet can easily become caught or otherwise be retained in its storage compartment, so that it does not immediately fall out of the storage compartment once the storage compartment has been moved in a first approaching stroke into a position opposite the dosing opening.
  • Moving the storage compartment to and fro above the dosing opening one or more times can in such a case help the cleaning tablet nevertheless to fall out of the storage compartment.
  • the control unit is adapted to control the drive mechanism such that, for emptying one of the storage compartments, the storage compartment in question is moved to and fro at least once.
  • the storage compartment in question can be moved at least once at least partly beyond the dosing opening and then back into a position radially opposite the dosing opening.
  • the dosing system comprises a sensor system which allows the presence of a portion of the solid detergent in a storage compartment to be detected before the storage compartment in question is moved into an emptying position (dosing position) relative to the dosing opening, wherein the control unit is adapted to control the drive mechanism such that, after one of the storage compartments has been moved into the emptying position, the storage compartment in question is moved back into the detection range of the sensor system.
  • the control unit can emit, for example, a visual or/and acoustic warning message for the user or/and make a further attempt at emptying the same storage compartment or/and try to empty the next storage compartment.
  • Some embodiments comprise a drive mechanism for driving the rotor in rotation, a control unit for controlling the drive mechanism, and a sensor system, coupled with the control unit, which allows the presence of a portion of the solid detergent in a storage compartment to be detected.
  • the control unit is adapted, if it is detected that a portion of the solid detergent has remained in one of the storage compartments after that storage compartment has been moved at least once into an emptying position relative to the dosing opening, to control the drive mechanism to move a further one of the storage compartments into the emptying position. Accordingly, even if it is not possible to successfully empty one of the storage compartments (e.g.
  • control unit If the control unit detects that it has not been possible to empty a storage compartment despite one or more attempts, the control unit can effect the emission of an audible or/and visual indication for an operator. This indication constitutes a request for the operator to clean the magazine and remove any agglutinated amounts of the detergent.
  • Hot steam or/and spray from the dishwashing chamber can enter the chute or/and the magazine chamber.
  • Hot steam or spray can be detrimental to the detergent stored in the annular magazine.
  • the detergent may partially dissolve and form clumps or stick to the walls of the storage compartments.
  • the ingress of hot moisture can be counteracted by a stream of blowing air which is introduced into the magazine chamber or/and into the chute.
  • the dosing system comprises a blower for generating a stream of blowing air into the magazine chamber or/and into the chute.
  • the blower can be in direct blowing air supply connection with the chute.
  • Direct means that a blowing air supply connection leads from an impeller chamber, in which an impeller of the blower is arranged, directly to the chute without first passing through other parts of the dosing system, in particular the magazine chamber.
  • the blower is in direct blowing air supply connection with the magazine chamber. From there, air that is blown in can then enter the chute. In such embodiments, there is a blowing air supply connection between the blower and the chute through the magazine chamber.
  • the chute can be able to be selectively shut off and freed.
  • the dosing system can comprise a shut-off member which is arranged so as to be movable to and fro, in particular in a translational manner, between a shut-off position and a freeing position and which, in the freeing position, frees the chute so that a portion of the solid detergent is able to fall through to the outlet opening and, in the shut-off position, shuts off the chute so that a portion of the solid detergent is unable to fall through to the outlet opening.
  • the shut-off member can in particular be configured such that, in its shut-off position, it closes substantially the entire chute cross section of the chute. Accordingly, when the chute is closed (i.e.
  • Embodiments of the invention therefore provide a control unit for the blower, wherein the control unit is adapted to control the blower to generate blowing air at least during a phase in which the shut-off member is in the freeing position.
  • blower it is possible to control the blower to generate blowing air additionally during phases in which the shut-off member is in the shut-off position and the chute is accordingly closed. This is because the presence of defects in tightness through which steam and/or spray can enter the magazine chamber cannot be ruled out. Therefore, it can be expedient to operate the blower also when the chute is shut off. For example, it is conceivable in some embodiments to drive the blower substantially continuously during the entire wet phase of an operating program of the dishwashing machine and if desired additionally even to allow it to run during a subsequent drying phase in which measures for actively drying the dishes are carried out by the dishwashing machine.
  • the dosing system comprises a pusher for urging a portion of the solid detergent stored in one of the storage compartments radially outwards in the fall direction.
  • the pusher can be in the form of, for example, a spring-operated pusher or an electromagnetically actuated pusher.
  • the dosing system comprises an electrically controllable drive mechanism for driving the rotor in rotation and a magazine cover, in particular a pivotably mounted magazine cover, for closing an access to the magazine chamber.
  • the magazine cover can be removed from the magazine chamber without separating a mechanical drive connection between the drive mechanism and the rotor and, when the magazine cover has been removed, each of the storage compartments is accessible through the access for filling with a portion of the solid detergent.
  • the rotor can be secured against axial removal from the magazine chamber by at least one fastening member (e.g. a screw), the release of which requires an auxiliary tool.
  • at least one fastening member e.g. a screw
  • the invention provides a dosing system for a domestic dishwashing machine, comprising: a rotor which is arranged or is able to be arranged in a magazine chamber so as to be rotatable about a rotor axis, wherein the rotor forms a central cup portion delimited by a cup lateral surface and a cup base, and a plurality of storage compartments which are arranged distributed in the circumferential direction radially outside the central cup portion and axially overlap the cup lateral surface, which storage compartments are each to receive a portion of a solid detergent; and an electrically controllable drive mechanism for driving the rotor in rotation, wherein, in an operation ready state of the dosing system, electromechanical or/and mechanical components of the drive mechanism, in particular an electric motor or/and a reduction gear, are accommodated in the interior of the cup so that they are concealed at least partly beneath the cup base.
  • the accommodation of components of the drive mechanism in the central cup portion is beneficial for a small overall height of the dosing system.
  • the inner circumference of the cup lateral surface can be used for the provision of a toothing with which a drive pinion, arranged in the central cup portion, of the drive mechanism is in meshing engagement.
  • a dosing system for a domestic dishwashing machine comprising: a rotor which is arranged or is able to be arranged in a magazine chamber so as to be rotatable about a rotor axis, wherein the rotor forms a plurality of storage compartments arranged distributed in the circumferential direction about the rotor axis, which storage compartments are each to receive a portion of a solid detergent; and a photoelectric sensor system which allows the presence of a portion of the solid detergent in a storage compartment to be detected, wherein the sensor system is adapted to shine into each of the storage compartments a sensor light beam which is directed from radially inwards to radially outwards or vice versa.
  • Shining a light beam directed radially or at a comparatively small (acute) angle relative to the radial direction through the storage compartments allows light-emitting or/and light-receiving components to be arranged radially inside or/and radially outside the storage compartments but within the axial height of the storage compartments.
  • the sensor system therefore does not require any additional installation space in the vertical direction. This is advantageous in view of the limitations in terms of installation space which are generally imposed by the door of a domestic dishwasher in the direction of the door thickness.
  • Each of the storage compartments can be delimited radially on the inside by a wall portion of the rotor provided with a window opening, wherein the sensor system is adapted to direct the sensor light beam through the window opening in each of the storage compartments.
  • a further aspect of the invention provides a domestic dishwashing machine having a dishwashing container, a door, mounted on the dishwashing container so as to be pivotable about a horizontal door pivot axis close to the floor, for closing a dishwashing chamber formed in the dishwashing container, and a dosing system, arranged at the door, for a solid detergent.
  • the dosing system comprises: a magazine for storing the solid detergent; a chute for conveying, by gravity, a portion of the solid detergent removed from the magazine to an outlet opening; a shut-off member which is arranged so as to be movable to and fro, in particular in a translational manner, between a shut-off position and a freeing position and which, in the freeing position, frees the chute so that a portion of the solid detergent is able to fall through to the outlet opening and, in the shut-off position, shuts off the chute at a shut-off point located downwards of the beginning of the chute so that a portion of the solid detergent is unable to fall through to the outlet opening; an electrically controllable actuator for driving the shut-off member; and a control unit which is adapted to control the actuator such that, while a dishwashing program of the dishwashing machine is running, the shut-off member is in the shut-off position for most of the duration of the program but, on removal of a portion of the solid detergent from the magazine, the removed
  • the control unit ensures that the free fall of a detergent portion delivered from the magazine into the chute is not temporarily stopped by the shut-off member because the shut-off member is still in its shut-off position. Instead, the control unit ensures that the shut-off member is in its freeing position when a detergent portion removed from the magazine falls into the chute. The detergent portion is thus able to fall through the entire chute at a stroke.
  • the control unit is suitably programmed or otherwise configured so that it effects the transfer of the shut-off member from the shut-off position into the freeing position in good time before a detergent portion delivered from the magazine into the chute reaches the location of the shut-off member. As soon as the detergent portion has passed the shut-off member, the shut-off member can immediately be moved back into its shut-off position.
  • a domestic dishwashing machine which comprises a dishwashing container, a door, mounted on the dishwashing container so as to be pivotable about a horizontal door pivot axis close to the floor, for closing a dishwashing chamber formed in the dishwashing container, and a dosing system, arranged at the door, for a solid detergent.
  • the dosing system comprises: a magazine for storing the solid detergent; a chute for conveying, by gravity, a portion of the solid detergent removed from the magazine to an outlet opening; a shut-off member which is arranged so as to be movable to and fro, in particular in a translational manner, between a shut-off position and a freeing position and which, in the freeing position, frees the chute so that a portion of the solid detergent is able to fall through to the outlet opening and, in the shut-off position, shuts off the chute so that a portion of the solid detergent is unable to fall through to the outlet opening; an electrically controllable actuator for driving the shut-off member; and a control unit which is adapted to control the actuator such that, in response to a received predefined operating command of an operator, without starting a dishwashing program of the dishwashing machine, the shut-off member is moved out of the shut-off position into the freeing position.
  • This functionality of the control unit allows the shut-off member to be transferred into its freeing
  • a dosing system for a domestic dishwashing machine comprising: a magazine for storing the solid detergent; a chute for conveying, by gravity, a portion of the solid detergent removed from the magazine to an outlet opening; a shut-off member which is arranged so as to be movable to and fro, in particular in a translational manner, between a shut-off position and a freeing position and which, in the freeing position, frees the chute so that a portion of the solid detergent is able to fall through to the outlet opening and, in the shut-off position, shuts off the chute at a shut-off point located downwards of the beginning of the chute so that a portion of the solid detergent is unable to fall through to the outlet opening; and a sensor system, in particular a photoelectric sensor system, associated with the chute, which sensor system is adapted to check a chute region of the chute above the shut-off point for the presence of a portion of the solid detergent.
  • the sensor system makes it possible for the chute to be scanned by means of sensors for the falling of a detergent portion removed from the magazine or/and for the presence of a detergent portion which has stopped at the (shut) shut-off member.
  • the functional reliability of the dosing system can thus be increased.
  • the sensor system makes it possible to determine whether, during a dosing operation, a detergent portion has actually entered the chute or/and passed through the chute.
  • the sensor system can work by the functional principle of a light barrier. Mechanical sensors with a sensor arm protruding into the fall path of the detergent in the chute are likewise conceivable as an alternative to a test light beam which is shone into the chute.
  • a further aspect of the invention provides a domestic dishwashing machine comprising: a rotor which is arranged or is able to be arranged in a magazine chamber so as to be rotatable about a rotor axis, wherein the rotor forms a plurality of storage compartments arranged distributed in the circumferential direction about the rotor axis, which storage compartments are each to receive a portion of a solid detergent; a chute for conveying, by gravity, a portion of the solid detergent removed from one of the storage compartments to an outlet opening; and a sensor system, in particular a photoelectric sensor system, which permits the detection of the presence of a portion of the solid detergent in one of the storage compartments and, independently thereof, the detection of the presence of a portion of the solid detergent in the chute.
  • the sensor system is adapted both to scan at least one of the storage compartments for the presence of a detergent portion and to monitor the chute for the entry or falling through of a detergent portion.
  • the dosing system in the last-mentioned aspect of the invention comprises a shut-off member which is arranged so as to be movable to and fro, in particular in a translational manner, between a shut-off position and a freeing position and which, in the freeing position, frees the chute so that a portion of the solid detergent is able to fall through to the outlet opening and, in the shut-off position, shuts off the chute at a shut-off point located downwards of the beginning of the chute so that a portion of the solid detergent is unable to fall through to the outlet opening
  • the sensor system is adapted in some embodiments to check a chute region of the chute above the shut-off point or/and a chute region of the chute below the shut-off point for the presence of a portion of the solid detergent.
  • the invention additionally provides a domestic dishwashing machine having a dishwashing container, a door, mounted on the dishwashing container so as to be pivotable about a horizontal door pivot axis close to the floor, for closing a dishwashing chamber formed in the dishwashing container, and a dosing system, arranged at the door, for a solid detergent, wherein the dosing system comprises a storage chamber for receiving a supply of the solid detergent and defines a fall section, leading to an outlet opening, for a portion of the detergent extracted from the supply. The outlet opening allows the extracted portion to emerge into the dishwashing chamber.
  • the dosing system comprises, in spatial association with the outlet opening, a movably arranged protective cover for selectively freeing and shutting off the outlet opening, and an electrically controllable, in particular electromotive, actuator with which the protective cover is drivingly coupled for its movement.
  • the dosing system comprises a shut-off member which is arranged so as to be movable to and fro, in particular in a translational manner, between a shut-off position and a freeing position and which, in the freeing position, frees the fall section so that an extracted portion of the detergent is able to fall through to the outlet opening and, in the shut-off position, shuts off the fall section so that detergent is unable to fall through to the outlet opening
  • the shut-off member is also drivingly coupled with the actuator for its movement.
  • the shut-off member and the protective cover are drivingly coupled with the same actuator. This permits synchronized actuation of the shut-off member and the protective cover; moreover, the outlay in terms of construction is simplified, since only a single actuator (and optionally only a single reduction gear) must be provided for actuating both components.
  • the actuator is controlled such that, while a dishwashing program of the dishwashing machine is running, the protective cover is in a closed position shutting off the outlet opening for most of the duration of the program, but is opened on condition of the occurrence of a predefined event.
  • a predefined event in this sense can be, for example, a dosing operation by which a detergent portion is to be removed from the storage chamber and sent to the fall section.
  • the protective cover can be closed again.
  • the time for which the protective cover frees the outlet opening during an operating program of the dishwashing machine can thus be reduced to a very short period of time of, for example, only a few seconds. Effective protection against the ingress of moisture into the fall section and the storage chamber is thereby provided.
  • the invention provides a domestic dishwashing machine having a dishwashing container, a door, mounted on the dishwashing container so as to be pivotable about a horizontal door pivot axis close to the floor, for closing a dishwashing chamber formed in the dishwashing container, and a dosing system, arranged at the door, for a solid detergent.
  • the dosing system comprises a storage chamber for receiving a supply of the solid detergent and defines a fall section, leading to an outlet opening, for a portion of the detergent extracted from the supply.
  • the outlet opening which allows the extracted detergent portion to emerge into the dishwashing chamber, is arranged, looking along the door pivot axis, eccentrically relative to a door transverse center.
  • an opening center of the outlet opening can be arranged offset by not less than 4 cm or not less than 8 cm or not less than 12 cm with respect to the door transverse center.
  • a larger number of detergent tablets can be stored in the annular magazine if a rotor of the annular magazine defines a plurality of tablet compartments distributed in the circumferential direction about a rotor axis and the detergent tablets, which are in the form of flat bodies with opposite large faces and small faces connecting the large faces and, looking at their large face, are longer and wider than they are thick and at the same time are longer than they are wide (such as, for example, in the case of a quadrangular form), are each placed into one of the tablet compartments standing on one of their longitudinal small faces.
  • the detergent tablets can be placed into the tablet compartments in such a manner that they are each oriented substantially radially, looking axially at the annular magazine.
  • the detergent tablets face one another with their large faces in the circumferential direction.
  • the invention additionally provides a tablet dosing system for installation in a domestic dishwashing machine, wherein the tablet dosing system comprises a magazine for storing detergent tablets in two stacks arranged side by side, and an extractor for extracting detergent tablets from the stacks and delivering extracted detergent tablets into a chute.
  • the extractor has an extractor member, which is arranged so as to be movable relative to the magazine, for individually serving each of the stacks for the purpose of extracting a detergent tablet from the stack in question.
  • the extractor member is formed by a rotary body which is arranged so as to be rotatable about an axis of rotation, wherein the two stacks are arranged side by side substantially along an orthogonal plane relative to the axis of rotation, and the rotary body has two extraction pockets which are distributed in particular unevenly in the circumferential direction and which are each dimensioned such that a detergent tablet can fall out of the magazine into the extraction pocket in question.
  • the two extraction pockets can lie within a circumferential segment of the rotary body which extends over not more than 220 degrees or not more than 200 degrees or not more than 180 degrees.
  • the arrangement of the rotary body such that the direction of the side-by-side arrangement of the tablet stacks is substantially parallel to the rotation plane of the rotary body permits a comparatively small installation depth of the extractor in the direction of the axis of rotation of the rotary body. Account can thus be taken of the generally limited available installation space in the door of the dishwashing machine in the direction of the door thickness.
  • such a tablet dosing system can comprise a blower for introducing blowing air into the magazine, wherein an impeller of the blower is arranged between the two stacks.
  • the invention additionally provides a tablet dosing system for installation in a domestic dishwashing machine, comprising a magazine for the ordered storage of detergent tablets, a chute for the gravity-driven delivery of a detergent tablet extracted from the magazine to an outlet opening, and a shut-off member which is arranged so as to be movable between a shut-off position and a freeing position and which, in the freeing position, frees the chute so that extracted detergent tablets are able to fall through to the outlet opening and, in the shut-off position, shuts off the chute so that detergent tablets are unable to fall through to the outlet opening.
  • the tablet dosing system is characterized by a blower for generating a stream of blowing air, wherein the blower comprises an impeller seated in an impeller chamber, and the impeller chamber is in blowing air supply connection with the chute or/and with an extractor chamber in which there is received a movably arranged extractor member for extracting a detergent tablet from the magazine and delivering the extracted detergent tablet into the chute.
  • blowing air generated by the blower can enter the chute or/and the extractor chamber and prevent the ingress of hot steam or/and spray into the magazine.
  • the invention also provides a domestic dishwashing machine which comprises a dishwashing container, a door, mounted on the dishwashing container so as to be pivotable about a horizontal door pivot axis close to the floor, for closing a dishwashing chamber formed in the dishwashing container, and a dosing system, arranged at the door, for a solid detergent, wherein the door has an inner lining on the door inner side facing the dishwashing chamber when the door is closed.
  • the dosing system comprises a storage chamber for receiving a supply of the solid detergent, and a chute for the gravity-driven delivery of a portion of the solid detergent removed from the supply to an outlet opening.
  • the dosing system further comprises a blower for introducing blowing air into the storage chamber or/and into the chute, wherein the blower comprises an impeller which is rotatably arranged in an impeller chamber and the impeller chamber is in blowing air supply connection with the storage chamber or/and the chute.
  • the impeller chamber is formed by a housing component fitted to the inner lining on the rear side, which housing component has one or more intake slots, which in particular are open towards the inner lining, for drawing air into the impeller chamber.
  • FIG. 1 shows, schematically, a domestic dishwashing machine according to an exemplary embodiment
  • FIG. 2 is a perspective view of the inner side of a door of a domestic dishwashing machine according to an exemplary embodiment
  • FIG. 3 a shows a tablet dosing system according to an exemplary embodiment for installation in a door of a domestic dishwashing machine in a situation in which a detergent tablet delivered from an annular magazine of the tablet dosing system is lying against a shut-off slider and is waiting for a chute to be freed,
  • FIG. 3 b shows the tablet dosing system of FIG. 3 a in a situation in which the shut-off slider has freed the chute and the detergent tablet has fallen through the chute
  • FIG. 4 is a perspective view of a rotor having multiple tablet compartments which is suitable for use in an annular magazine, according to an exemplary embodiment
  • FIG. 5 a is a perspective view of an exemplary embodiment of a tablet dosing system having an annular magazine in a situation in which the magazine cover is open,
  • FIG. 5 b is a sectional view of the tablet dosing system of FIG. 5 a with the rotor of the annular magazine removed,
  • FIG. 5 c is a plan view of the tablet dosing system of FIG. 5 a
  • FIG. 6 a shows a further exemplary embodiment of a tablet dosing system having an annular magazine in a situation in which a protective cover of the tablet dosing system is open
  • FIG. 6 b shows the tablet dosing system of FIG. 6 a in a situation in which the protective cover is closed
  • FIGS. 7 a to 7 d are different views of a tablet dosing system having an annular magazine according to a further exemplary embodiment
  • FIG. 8 shows a detail of an annular magazine having a spring-operated pusher according to an exemplary embodiment
  • FIG. 9 shows an annular magazine having an electromagnetic pusher according to an exemplary embodiment
  • FIG. 10 is a partially cutaway perspective view of a blower according to an exemplary embodiment mounted on a door of a dishwashing machine
  • FIG. 11 shows a tablet dosing system having stack magazines according to an exemplary embodiment
  • FIG. 12 shows a tablet dosing system having stack magazines according to a further exemplary embodiment.
  • the dishwashing machine illustrated therein which is intended for domestic use, is denoted generally 10 . It comprises a machine body (dishwashing container) 12 in which a dishwashing chamber 14 is formed. On the machine body 12 there is mounted a door 16 which is pivotable about a horizontal pivot axis 17 close to the floor. The door 16 can be pivoted between a fully open position shown in FIG. 1 , in which it is situated with its door plane substantially horizontal, and a closed position, in which it closes the dishwashing chamber 14 to the outside and stands substantially vertically.
  • a control unit 18 is responsible for controlling the operation of the dishwashing machine 10 .
  • the control unit 18 is built into the door 16 . It will be appreciated that, in other embodiments, at least parts of the control unit 18 can be arranged on the machine body 12 .
  • the control unit 18 is responsible not only for controlling the dishwashing operation and optionally a drying operation of the dishwashing machine 10 , but also for controlling a dosing system 20 by means of which, in an automated manner, a portion can be removed from a supply of a solid detergent and delivered into the dishwashing chamber 14 .
  • the solid detergent is in tablet form, that is to say is formed by detergent tablets which are produced with a defined, for example approximately quadrangular, shape. Accordingly, the dosing system 20 will also be referred to hereinbelow as a tablet dosing system.
  • the tablet dosing system 20 is arranged at the door 16 .
  • the door 16 has an inner lining panel 22 which is arranged on the inner side of the door 16 facing the dishwashing chamber 14 when the door 16 is closed and is typically made of sheet-metal material.
  • At least parts of the tablet dosing system 20 can be fitted externally to the inner lining panel 22 .
  • at least parts of the tablet dosing system 20 can be concealed behind the inner lining panel 22 .
  • the inner lining panel 22 can contain one or more apertures into which at least parts of the tablet dosing system 20 can be inserted.
  • the tablet dosing system 20 a has a cover 24 a , which in the example shown is in the form of a screw cover but may alternatively also be in the form of, for example, a hinged or pivotable cover or in the form of a sliding cover.
  • a cover 24 a at least part of a magazine of the tablet dosing system 20 a in which detergent tablets can be stored can be located beneath the cover 24 a .
  • a user can thus gain access to the tablet magazine. Access can in particular be such that the user is able to refill the tablet magazine or/and is able to remove a fillable magazine component through the access.
  • the cover 24 a can be designed to be transparent at least in one or more cover regions in order to allow a user to check the filling level of the tablet magazine visually without having to remove the cover 24 a.
  • the tablet dosing system 20 a additionally has a hood 26 a which covers an outlet opening located at the bottom end of a chute (fall channel or fall section), not shown in greater detail in FIG. 2 , through which a detergent tablet removed from the tablet magazine can fall into the dishwashing chamber of the dishwashing machine.
  • a chute fall channel or fall section
  • the hood 26 a is arranged offset eccentrically with respect to an imaginary center line M which runs in the middle of the door 16 a from the door top edge to the door bottom edge.
  • the door center here means the center as seen along the pivot axis 17 a , that is to say in the transverse direction of the door 16 a .
  • the tablet dosing system 20 a is arranged wholly on the other side of the transverse center of the door 16 a .
  • the eccentric offset of the hood 26 a and of the outlet opening, concealed therebeneath, of the chute relative to the door transverse center can ensure that spray which strikes the door 16 a in the region of the door transverse center cannot enter the chute through the outlet opening.
  • the probability of moisture entering the chute and the tablet magazine can be reduced by the transversely offset arrangement of the tablet dosing system 20 a .
  • the distance d extends in FIG. 2 from the center line M to an imaginary midpoint of the hood 26 a , or of the outlet opening of the chute located therebeneath.
  • FIG. 2 there is additionally shown in the inner side of the door 16 a a cover cap 28 a , beneath which there can be located one or more filling openings for various other additives which are necessary for cleaning operation of the dishwashing machine, in particular liquid additives, such as, for example, a rinse aid.
  • liquid additives such as, for example, a rinse aid.
  • the tablet dosing system 20 b shown therein comprises an annular magazine 30 b which has a magazine housing 32 b and a rotor 36 b rotatable about a rotor axis 34 b .
  • the rotor 36 b is inserted into a magazine chamber 37 b having a circular contour which is formed by the magazine housing 32 b .
  • a rotor drive unit (generally: drive mechanism), not shown in greater detail in FIGS. 3 a , 3 b , for driving the rotor 36 b in rotation about the rotor axis 34 b .
  • the rotor drive unit can comprise, for example, an electric motor as the source of the drive power.
  • the rotor 36 b can be removable for cleaning purposes and, looking at FIG. 2 , can be arranged concealed behind the cover 24 a so that, by opening the cover 24 a , a user can gain direct access to the rotor 36 b.
  • the rotor 36 b defines a plurality of tablet compartments (generally: storage compartments) 38 b , which are distributed in an annular arrangement about the rotor axis 34 b .
  • the tablet compartments 38 b can also be referred to as storage cells, and for this reason the rotor 36 b can also be referred to as a cell wheel or as a distributor wheel.
  • Adjacent tablet compartments 38 b are in each case separated from one another by a separating wall structure 40 b . In situations as are shown in FIGS. 3 a , 3 b , a detergent tablet 42 b has been placed in some of the tablet compartments 38 b .
  • the detergent tablets 42 b have an approximately quadrangular shape, wherein they are in the form of flat bodies with opposite large faces 44 b and small faces 46 b between the large faces 44 b .
  • the quadrangular shape of the detergent tablets 42 b means that they have two longer small faces 46 b , which extend in the longitudinal direction of the quadrangle, and two shorter small faces 46 b , which extend in the direction of the width of the quadrangle.
  • the length and width of the quadrangular detergent tablets 42 b are greater than the thickness of the detergent tablets 42 b measured between the large faces 44 b.
  • the tablet compartments 38 b are so narrow that the detergent tablets 42 b must each be placed in the annular magazine 30 b standing on one of their small faces 46 b .
  • Standing on a small face means that the detergent tablets 42 b face one another with their large faces 44 b in the circumferential direction and lie with one of their small faces 46 b on an axially oriented bearing surface 47 b , which in the example shown is part of the rotor 36 b .
  • the detergent tablets 42 b Owing to the small width of the tablet compartments 38 b , the detergent tablets 42 b cannot be placed therein lying on their large faces.
  • the detergent tablets 42 b are placed in the tablet compartments 38 b lying on one of their longer small faces 46 b (i.e. longitudinal small faces). In this manner, the overall height of the annular magazine 30 b can be kept small.
  • the depth of the tablet compartments 38 b measured in the axial direction of the rotor 36 b is greater than the width of the detergent tablets 42 b ; the separating wall structure 40 b accordingly protrudes axially above the detergent tablets 42 b when the detergent tablets 42 b are inserted into the tablet compartments 38 b standing on their longitudinal small faces.
  • the detergent tablets 42 b placed in the tablet compartments 38 b are oriented substantially radially.
  • the manner of introducing the detergent tablets 42 b into the tablet compartments 38 b which is shown allows a comparatively large number of detergent tablets 42 b to be accommodated in the annular magazine 30 b .
  • FIG. 4 In this figure, only the rotor 36 c with its tablet compartments 38 c is shown.
  • a detergent tablet 42 c which is approximately quadrangular in shape as in the example shown in FIGS. 3 a , 3 b has been inserted into one of the tablet compartments 38 c lying on its large face.
  • the rotor 36 c in the example shown is designed in the manner of a disk rotor and has a disk portion 48 c from which separating wall structures 40 c protrude axially on one side of the disk.
  • the disk portion 48 c forms an axial bearing surface for the detergent tablets 42 c ; alternatively, it is conceivable not to design the rotor 36 c as a disk rotor but to design it to be axially completely open in the region of the tablet compartments 38 c , so that the detergent tablets 42 c lie axially on a chamber base of the magazine chamber 37 c.
  • the separating wall structures 40 c are arranged radially outside a central cup portion 50 c of the rotor 36 c .
  • the central cup portion 50 c is delimited by a cup lateral surface 52 c extending in the circumferential direction and a cup base 54 c , which delimit in the manner of a cup a space in which components of a drive mechanism for driving the rotor 36 c in rotation can be accommodated in a space-saving manner.
  • This cup interior is accessible from the other axial side of the rotor 36 c (i.e. from the rear axial side remote from the viewer in FIG. 4 ).
  • cup lateral surface 52 c in the example shown not only axially overlaps the separating wall structures 40 c but even protrudes axially above them.
  • the mentioned components of the drive mechanism can therefore be accommodated in the dosing system approximately in the axial region of the detergent tablets 42 c inserted into the tablet compartments 38 c . This ensures a small overall height of the dosing system.
  • the annular magazine 30 b with the rotor 36 b can be arranged beneath a magazine cover (for example the cover 24 a of FIG. 2 ), so that the user, after removing the cover, obtains access to the rotor 36 b and the tablet compartments 38 b .
  • the intended installation position of the annular magazine 30 b is substantially parallel to the main plane of the door of the dishwashing machine (e.g. door 16 a ), that is to say the annular plane of the annular magazine 30 b should lie substantially parallel to the door plane.
  • the rotor axis 34 b is accordingly oriented substantially horizontally. Gravity therefore acts substantially along the annular plane of the annular magazine 30 b when the door is closed.
  • the tablet compartments 38 b are designed to be open radially outwards. If the rotor 36 b is removed from the magazine chamber 37 b , detergent tablets 42 b , which are inserted into the tablet compartments 38 b , are therefore readily able to slide radially outwards out of the rotor 36 b .
  • the rotor 36 b itself does not contain any structures by which detergent tablets 42 b inserted into the tablet compartments 38 b are prevented from sliding radially outwards.
  • a chamber delimiting wall 56 b which extends in the manner of an annular wall radially on the outside around the rotor 36 b .
  • the chamber delimiting wall 56 b is part of the magazine housing 32 b and delimits the magazine chamber 37 b radially on the outside.
  • two openings are formed in the chamber delimiting wall 56 b .
  • a first of these openings forms a dosing opening 58 b , which can also be referred to as an extraction opening and which is located at the 6 o'clock position of the annular magazine 30 b (when looking frontally at the vertically standing door).
  • the other opening forms a blowing air supply opening 60 b ; it is located in the example shown at the 12 o'clock position but may alternatively be situated at a different angular position of the magazine housing 32 b , for example somewhere between the 9 o'clock position and the 3 o'clock position.
  • the magazine chamber 37 b is connected to a chute 62 b , which extends substantially vertically downwards (when looking at the vertically standing door from the front) from the magazine chamber 37 b and allows a detergent tablet 42 b to fall freely, solely by gravity, from the magazine chamber 37 b to an outlet opening 64 b located at the end of the chute 62 b .
  • the chute 62 b is formed by a chute housing 66 b which is fixedly connected to the magazine housing 32 b ; for example, the magazine housing 32 b and the chute housing 66 b can be formed by a one-piece integral housing component.
  • the chute 62 b opens on the inner side of the door to the region surrounding the door.
  • a detergent tablet 42 b which falls out at the outlet opening 64 b can accordingly pass into the dishwashing chamber of the dishwashing machine and be taken up and dissolved by the dishwashing water sprayed or collected there.
  • the outlet opening 64 b is located in the region of the hood 26 a.
  • shut-off slider 68 b Associated with the chute 62 b is a shut-off slider 68 b which is linearly adjustable between a shut-off position shown in FIG. 3 a and a freeing position shown in FIG. 3 b .
  • the tablet dosing system 20 b can have an actuator (not shown in greater detail in FIGS. 3 a , 3 b ), for example an electromotive actuator, which is controlled by a control unit, for example the control unit 18 of FIG. 1 .
  • the shut-off slider 68 b blocks the fall of detergent tablets 42 b through the chute 32 b ; in the freeing position according to FIG.
  • the shut-off slider 68 b has moved sufficiently far out of the chute 62 b that detergent tablets 42 b are able to fall through the chute 62 b .
  • a purpose of the shut-off slider 68 b is to prevent spray or/and hot steam from rising through the chute 62 b towards the magazine chamber 37 b . Therefore, the shut-off slider 68 b closes the chute 62 b substantially over its entire chute cross section in its shut-off position.
  • the rotor 36 b For the dosing (i.e. extraction) of a detergent tablet 42 b , the rotor 36 b is moved into a position in which a tablet compartment 38 b filled with a detergent tablet 42 b is in the 6 o'clock position, that is to say assumes a position radially opposite the dosing opening 58 b .
  • the dosing opening 58 b is sufficiently large to allow the detergent tablet 42 b stored in the tablet compartment 38 b in question to fall through the dosing opening 58 b into the chute 62 b .
  • the detergent tablet 42 b despite the tablet compartment 38 b in question being oriented precisely relative to the dosing opening 58 b , does not immediately fall into the chute 62 b .
  • the detergent tablet 42 b is not lying completely loosely in its tablet compartment 38 b .
  • a conceivable movement pattern for the rotor 36 b can comprise moving the tablet compartment 38 b in question towards the dosing opening 58 b in a first direction of rotation (e.g. clockwise) and partly moving it past the dosing opening 58 b in the same direction of rotation. According to this movement pattern, the rotor 36 b is then moved back in the opposite direction of rotation (e.g.
  • the movement pattern of the rotor 36 b for emptying a tablet compartment 38 b can thus comprise moving the rotor 36 b to and fro in the region of the dosing opening 58 b at least once.
  • the shut-off slider 68 b On emptying of a tablet compartment 38 b , the shut-off slider 68 b can assume its shut-off position, as is shown in FIG. 3 a .
  • the detergent tablet 42 b which has fallen out of the tablet compartment 38 b is then stopped from falling by the shut-off slider 68 b and remains in front of the shut-off slider 68 b until the shut-off slider 68 b is moved into its freeing position according to FIG. 3 b . It is conceivable to discharge a detergent tablet 42 b from the annular magazine 30 b into the chute 62 b only after an operating program of the dishwashing machine has started.
  • An alternative dosing procedure provides that, at the precise moment at which a detergent tablet 42 b is discharged from the annular magazine 30 b into the chute 62 b , the shut-off slider 68 b is already in its freeing position according to FIG. 3 b .
  • the detergent tablet 42 b which has fallen into the chute 62 b is then not stopped by the shut-off slider 68 b but is able to fall freely and uninterruptedly through the entire chute 62 b to the outlet opening 64 b .
  • the shut-off slider 68 b is not opened, for example, until shortly before the detergent tablet 42 b is extracted from the annular magazine 30 b , and the shut-off slider 68 b is closed again as soon as the detergent tablet 42 b has passed through the chute 62 b.
  • FIGS. 3 a , 3 b show, schematically, sensors 70 b , 72 b which can monitor the chute 62 b by means of sensors in respect of the falling through of a detergent tablet 42 b .
  • these sensors 70 b , 72 b each operate in the manner of a light barrier, which is broken for a short time when a detergent tablet 42 b falls through the test light beam of the light barrier in question.
  • the sensor 70 b is arranged above the shut-off point at which the shut-off slider 68 b can shut off the chute 62 b ; the sensor 72 b is arranged below this shut-off point.
  • the operation of the dosing system 20 b is so configured that a detergent tablet 42 b which has fallen into the chute 62 b is first stopped by the shut-off slider 68 b (corresponding to the illustration in FIG. 3 a ), it can be expedient to provide a sensor both above and below the shut-off slider 68 b .
  • the sensor located above the shut-off point in the example shown the sensor 70 b , is then expediently so positioned that it is able to detect the presence of a detergent tablet 42 b when the detergent tablet 42 b is lying against the closed shut-off slider 68 b.
  • the blowing air supply opening 60 b connects the magazine chamber 37 b to an impeller chamber 74 b in which an impeller 76 b of a blower generally denoted 78 b is seated.
  • the impeller chamber 74 b is formed by a blower housing 80 b , which is fixedly connected to the magazine housing 32 b ; for example, the blower housing 80 b and the magazine housing 32 b are formed integrally in one piece.
  • the blower 78 b serves to generate a stream of blowing air into the magazine chamber 37 b . From the magazine chamber 37 b , the blowing air which has been introduced passes through the dosing opening 58 b into the chute 62 b . The blowing air acts against the ingress of hot steam through the outlet opening 64 b into the chute 62 b and can generate a drying action if moisture has entered the dosing system 20 b.
  • the blower 78 b comprises a drive unit, not shown in greater detail in FIGS. 3 a , 3 b , for driving the impeller wheel 76 b in rotation.
  • a control unit likewise not shown, for example the control unit 18 of FIG. 1 , serves to control the drive of the blower 78 b .
  • This control unit controls the blower 78 b in such a manner that blowing air is generated at least when the shut-off slider 68 b is in its freeing position according to FIG. 3 b during a dishwashing phase of the dishwashing machine.
  • shut-off slider 68 b It may be advantageous to drive the blower 78 b to generate blowing air additionally at least during part of the operating phases of the dishwashing machine in which the shut-off slider 68 b is in its shut-off position according to FIG. 3 a . This is because, even when the shut-off slider 68 b is closed, the undesirable ingress of hot steam through the chute 62 b into the magazine chamber 37 b or/and past a cover (for example the cover 24 a of FIG. 2 ) arranged above the annular magazine 30 b cannot always be ruled out completely. It may be that the shut-off slider 68 b does not seal the chute 62 b perfectly in its shut-off position.
  • the seal between the magazine housing 32 b and a magazine cover seated thereon, such as, for example, the cover 24 a of FIG. 2 is not perfect.
  • the presence of defects in tightness through which hot steam or/and spray can penetrate the inner regions of the dosing system 20 b and impair the quality of the stored detergent tablets 42 b must therefore usually be expected. Therefore, it can be expedient to drive the blower 78 b also during phases in which the shut-off slider 68 b is closed.
  • blower 78 b it is conceivable to allow the blower 78 b to run substantially uninterruptedly during the entire phase in which, while an operating program of the dishwashing machine is being carried out, dishwashing water is sprayed in the dishwashing chamber of the dishwashing machine.
  • FIGS. 5 a to 5 c This does not differ substantially from the exemplary embodiment of FIGS. 3 a , 3 b .
  • a slider housing 82 d which forms a slide channel for a linearly movably arranged shut-off slider (e.g. the shut-off slider 68 b of FIGS. 3 a , 3 b ), by means of which the chute 62 d can selectively be shut off and freed at a distance beneath the dosing opening 58 d .
  • the slider housing 82 d can be integrally connected to the chute housing 66 d.
  • FIG. 5 a There can additionally be seen in FIG. 5 a a cover 24 d which is pivotably attached to the chute housing 66 d and by means of which the annular magazine 30 d is closable.
  • the access can be such that, when the cover 24 d is open, the rotor 36 d can be removed from the magazine chamber 37 d and from the annular magazine 30 d , for example after a fastening screw, not shown, which is accessible by opening the cover 24 d , has been removed.
  • the rotor 36 d can accordingly be installed fixedly but releasably in the annular magazine 30 d , in particular in such a manner that it cannot be removed solely by hand without an auxiliary tool (e.g. screwdriver).
  • the drive mechanism 84 d uses, for example, an electric motor (not shown in detail) as the source of the drive power and comprises a gear train 86 d with a reduction function for transmitting the drive power of the source to the rotor 36 d .
  • the gear train 86 d comprises a drive pinion 88 d , which is arranged in the central cup portion 50 d concealed beneath the cup base 54 d and is in meshing engagement with a toothing (not shown in greater detail in FIG. 5 b ) formed on the inner circumferential side of the cup lateral surface 52 d .
  • the entire gear train 86 d can be accommodated in the cup interior delimited by the central cup portion 50 d .
  • the force-transmitting engagement of the drive pinion 88 d with the cup lateral surface 52 d at the inner circumference thereof permits a small overall height of the annular magazine 30 d.
  • the cover 24 d When the cover 24 d is open, the user has access to all the tablet compartments 38 d of the annular magazine 30 d . Without having to rotate the rotor 36 d , the user is accordingly able to fill each of the tablet compartments 38 d with a detergent tablet 42 d when the cover 24 d is open. To this end, the rotor 36 d can remain in the magazine chamber 37 d ; the rotor 36 d does not have to be removed from the magazine chamber 37 d . Filling of the rotor 36 d with detergent tablets 42 d can accordingly be carried out in a state in which the rotor 36 d is in force-transmitting engagement with the drive mechanism 84 d.
  • FIGS. 6 a , 6 b differs from the exemplary embodiment of FIGS. 5 a to 5 c substantially by the additional provision of a protective cover 90 e , which in the example shown is in the form of a pivotable cover and is held on the chute housing 66 e so as to be pivotable between an open position shown in FIG. 6 a and a closed position shown in FIG. 6 b .
  • the protective cover 90 e frees the outlet opening 64 e , so that the outlet opening 64 e is freed for the discharge of detergent tablets 42 e .
  • the protective cover 90 e is pivoted over the outlet opening 64 e , so that the outlet opening 64 e is shut off against the falling out of detergent tablets 42 e .
  • the protective cover 90 e when it is in the closed position according to FIG. 6 b , prevents hot steam or spray from entering the chute (not shown in greater detail in FIGS. 6 a , 6 b ) formed in the interior of the chute housing 66 e at the outlet opening 64 e.
  • the dosing system 20 e of FIGS. 6 a , 6 b is in this respect equipped with a double barrier for preventing the rise of steam or/and spray through the chute into the region of the annular magazine 30 e .
  • a first barrier is formed by the protective cover 90 e ;
  • a second barrier is formed by the shut-off slider 68 e , indicated only by a broken line in FIGS. 6 a , 6 b , which is movably guided in the slider housing 82 e and is able to shut off the chute at a shut-off point between the top and the bottom chute end.
  • an actuator 92 e is coupled via a mechanical drive connection 94 e with the shut-off slider 68 e and is coupled via a mechanical drive connection 96 e with the protective cover 90 e .
  • the drive connections 94 e , 96 e comprise, for example, one or more gears, the actuator 92 e is in the form of, for example, an electromotive actuator.
  • the protective cover 90 e and the shut-off slider 68 e can be supplied with drive power from a single, that is to say common, source.
  • the actuator 92 e is so controlled and the drive connections 94 e , 96 e are so configured that the shut-off slider 68 e and the protective cover 90 e open and close in a synchronized manner when the actuator 92 e is actuated.
  • the protective cover 90 e is at the same time pivoted from the open position according to FIG. 6 a into the closed position according to FIG. 6 b , and vice versa.
  • the actuator 92 e is controlled by a suitable control unit, for example the control unit 18 of FIG. 1 .
  • FIG. 7 a is a perspective view of the annular magazine 30 f , as a user sees it when he has opened a magazine cover (for example the cover 24 a of FIG. 2 or the cover 24 d of FIG. 5 a ).
  • FIG. 7 b is a view similar to FIG. 7 a , but wherein the cup base 54 f of the central cup portion 50 f of the rotor 36 f has been removed so that it is possible to see into the interior of the central cup portion 50 f .
  • FIG. 7 c shows a section through the annular magazine 30 f
  • FIG. 7 d is a partially cutaway overall view of the tablet dosing system 20 f equipped with the annular magazine 30 f of FIGS. 7 a to 7 c , wherein a tablet compartment 38 f that is to be emptied next is located in a test position.
  • a window opening 98 f is formed in the cup lateral surface 52 f of the rotor 36 f in the region of each of the tablet compartments 38 f .
  • the annular magazine 30 f additionally comprises a photoelectric sensor component 100 f ( FIG. 7 d ) which is accommodated in the cup interior of the central cup portion 50 f and implements, for example, a light barrier or part thereof and serves to detect the presence or absence of a detergent tablet in one of the tablet compartments 38 f .
  • the sensor component 100 f is so arranged that it is able to check, in a test position angularly offset with respect to the dosing position, a tablet compartment 38 f that is to be emptied next for the presence or absence of a detergent tablet.
  • the test position is consequently angularly offset with respect to the 6 o'clock position; in the example shown in FIG. 7 d , the test position corresponds approximately to the quarter past five position.
  • the test position corresponds to an angular position in which the tablet compartment 38 f in question is not yet situated wholly opposite the dosing opening 58 f , so that, in the test position, a detergent tablet present in the tablet compartment 38 f in question is not yet able to fall out of the tablet compartment 38 f into the chute 62 f
  • the test position corresponds to an angular position in which the tablet compartment 38 f in question is located substantially outside the extent of the dosing opening 58 f .
  • the test position is sufficiently close to the dosing position to ensure that, on rotation of the rotor 36 f , the tablet compartment 38 f in question is the next tablet compartment to move into the dosing position (i.e. no other tablet compartment 38 f should reach the dosing position beforehand).
  • a tablet compartment 38 f is moved into a position radially opposite the dosing opening 58 f , it is possible to check, by means of the sensor component 100 f , whether there is a detergent tablet in the tablet compartment 38 f in question. If the magazine controller (formed, for example, by the control unit 18 of FIG. 1 ) determines that the tablet compartment 38 f in question is empty, it can emit, for example, a visual or/and acoustic indication by means of which the user is requested to fill the annular magazine 30 f with new detergent tablets. Other predefined control actions are of course likewise conceivable.
  • the magazine controller once one of the tablet compartments 38 f has been moved into a position radially opposite the dosing opening 58 f , can check whether the tablet compartment 38 f in question has actually been emptied. To this end, the magazine controller can instigate a backward movement of the rotor 36 f into a rotational position in which the tablet compartment 38 f in question is again in the test position, so that the sensor component 100 f can check the tablet compartment 38 f in question again. If the magazine controller then determines that the tablet compartment 38 f in question is empty, it knows that the detergent tablet previously located therein has actually been emptied properly into the chute 62 f.
  • the window openings 98 f in the cup lateral surface 52 f of the rotor 36 f allow the sensor component 100 f to “see”, figuratively speaking, into the tablet compartments 38 f
  • the sensor component 100 f can comprise, for example, a light-emitting diode which transmits a sensor light beam 101 f ( FIG. 7 d ) oriented radially or at a comparatively small angle relative to the radial direction.
  • the sensor light beam 101 f passes through the window opening 98 f of the tablet compartment 38 f in question (when it is in the test position) and either strikes a detergent tablet, if one is present in the tablet compartment 38 f , or passes through the entire tablet compartment 38 f radially outwards to the chamber delimiting wall 56 f .
  • a photodetector e.g. photodiode or phototransistor
  • such a photodetector can be contained in the sensor component 100 f , wherein the light barrier then works by the reflection principle and utilizes different degrees of reflection according to whether the sensor light beam 101 f strikes a detergent tablet or the chamber delimiting wall 56 f.
  • FIGS. 8 and 9 differ from the preceding exemplary embodiments by the presence of a pusher, which is able to impart a pulse-like thrust in the direction of fall (i.e. in the direction of gravity) to a detergent tablet that is in the dosing position (i.e. in a position radially opposite the dosing opening) in a tablet compartment.
  • a pusher which is able to impart a pulse-like thrust in the direction of fall (i.e. in the direction of gravity) to a detergent tablet that is in the dosing position (i.e. in a position radially opposite the dosing opening) in a tablet compartment.
  • a pusher which is able to impart a pulse-like thrust in the direction of fall (i.e. in the direction of gravity) to a detergent tablet that is in the dosing position (i.e. in a position radially opposite the dosing opening) in a tablet compartment.
  • Such a push can help the detergent tablet to fall out of the tablet compartment in question
  • the mentioned pusher is in the form of a spring-operated pusher 102 g , which generates the desired push from its inherent spring tension.
  • the spring-operated pusher 102 g is formed by a spring bow 104 g , which forms a resiliently deflectable pusher nose 106 g .
  • the spring bow 104 g can be formed by a metal strip which has been bent into the desired shape by bending.
  • the pusher nose 106 g then protrudes to a certain extent into the tablet compartment 38 g in question through a window opening 107 g formed in the cup lateral surface 52 g of the rotor 26 g .
  • Each of the tablet compartments 38 g of the rotor 36 g is designed with such a window opening 107 g .
  • the window openings 98 f therein can serve as the window openings 107 g of FIG. 8 .
  • the opening edge of the window opening 107 g in question pushes the pusher nose 106 g radially inwards, so that the cup lateral surface 52 g is able to slide past the pusher nose 106 g until the next window opening 107 g moves into the region of the pusher nose 106 g .
  • the pusher nose 106 g owing to its inherent spring tension, then snaps into that next window opening 107 g and pushes against a detergent tablet located in the associated tablet compartment 38 g . The detergent tablet is thus actively pushed into the chute.
  • an electromagnetic pusher 108 h is provided instead of a spring-operated pusher, which electromagnetic pusher has an electromagnetic actuator 110 h and a pusher head 112 h which can be advanced in a pulse-like manner by excitation of the electromagnetic actuator 110 h .
  • the pusher head 112 h has the same function as the pusher nose 106 g of the spring-operated pusher 102 g of FIG. 8 ; on excitation of the electromagnetic actuator 110 h , the pusher head 112 h moves to a certain extent through the window opening 98 h of the tablet compartment 38 h that is currently in the dosing position, that is to say in a position radially opposite the chute, into the tablet compartment 38 h in question.
  • the pusher head 112 h pushes against the detergent tablet and thereby initiates its fall into the chute.
  • FIG. 10 is a partially cutaway view of an exemplary embodiment of the blower 78 i with the impeller 76 i housed in the blower housing 80 i .
  • the blower housing 80 i is fitted to the rear side of the door lining panel 22 i of the door 16 i (rear side means the side of the door lining panel 22 i that faces towards the inside of the door, that is to say away from the dishwashing chamber).
  • the intake of air by means of the impeller 76 i takes place through intake slots 114 i which are formed in the blower housing 80 i and are open towards the inner lining panel 22 i .
  • the intake slots 114 i are accordingly closed at the end.
  • Such intake slots 114 i can be provided along all four sides of the blower housing 80 i , which in the example shown has a quadrangular contour. Owing to the position of the intake slots 114 i close to the panel, the intake of air takes place close to the inner lining panel 22 i . Air flows substantially along the inner lining panel 22 i through the intake slots 114 i into the impeller chamber 74 i and is pushed by the impeller 76 i into the magazine chamber of the annular magazine and adjoining parts of the dosing system.
  • the tablet dosing system 20 k comprises not an annular magazine but a stack magazine 116 k having two magazine chutes 118 k , each of which allows a plurality of detergent tablets 42 k , which in the example shown are of quadrangular shape, to be stored in a tablet stack.
  • the two magazine chutes 118 k extend at least over a portion of their chute length at a distance from one another, wherein the gap between the two magazine chutes 118 k is used to accommodate the blower 78 k , more precisely to accommodate the blower housing 80 k of the blower 78 k housing the impeller 76 k .
  • Both magazine chutes 118 k can thus be supplied uniformly with blowing air by the blower 78 k .
  • the blowing air is blown directly by the blower 78 k into the chute chambers of the magazine chutes 118 k.
  • the tablet dosing system 20 k For individually serving the two tablet stacks, that is to say for individually removing a detergent tablet 42 k from a chosen tablet stack, the tablet dosing system 20 k comprises an extractor slider 120 k , which is linearly adjustable by means of a slider drive unit, not shown in greater detail, for example an electromotive slider drive unit, between different positions in which it is ready to receive a detergent tablet 42 k from one of the tablet stacks (corresponding to the illustration of FIG. 11 ) and to deliver the received detergent tablet 42 k into the chute, only the chute housing 66 k of which is visible in FIG. 11 .
  • a slider drive unit not shown in greater detail, for example an electromotive slider drive unit
  • blowers 78 ′ k and 78 ′′ k which are arranged at a different location of the dosing system 20 k to the blower 78 k and illustrate alternative or additional arrangement positions for such blowers.
  • the blower 78 ′ k is in direct blowing air supply connection with the chute inside the chute housing 66 k
  • the blower 78 ′′ k is in direct blowing air supply connection with the slider chamber in which the extractor slider 120 k is slidably received.
  • not all three blowers 78 k , 78 ′ k , 78 ′′ k have to be provided. Provided that one of the mentioned three blowers is sufficient to ensure a flow of blowing air through the magazine chutes 118 k , the chute and the slider chamber, the remaining blowers can be omitted.
  • the tablet dosing system 20 l again comprises a stack magazine 116 l having two magazine chutes 118 l which, as in the exemplary embodiment of FIG. 11 , are served by a common extractor member.
  • this extractor member is in the form of a rotary extractor 122 l which is received in an extractor housing 126 l so as to be rotatable about an axis of rotation 124 l .
  • the axis of rotation 124 l is substantially orthogonal to the main plane of the door of the dishwashing machine; the two magazine chutes 118 l are thus fitted into the door such that the tablet stacks formed in the magazine chutes 118 l by the detergent tablets 42 l are arranged side by side along an orthogonal plane to the axis of rotation 124 l.
  • the rotary extractor 122 l has two extraction pockets 128 l , which are each dimensioned to receive a detergent tablet 42 l .
  • the two extraction pockets 128 l are unevenly distributed in the circumferential direction of the rotary extractor 122 l , that is to say they are not diametrically opposite one another. Instead, the two extraction pockets 128 l are formed in the example shown within a 180° segment of the rotary extractor 122 l .
  • the rotary extractor 122 l can be controlled such that, for example, it serves one of the tablet stacks with one of the extraction pockets 128 l (i.e.

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DE102021110759.8A DE102021110759A1 (de) 2020-12-07 2021-04-27 Dosierung eines Feststoff-Reinigungsmittels in einer Haushalts-Geschirrspülmaschine

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WO2024211804A1 (en) * 2023-04-06 2024-10-10 Ecolab Usa Inc. System for dispensing solid detergent in dishwasher
EP4578366A1 (en) 2023-12-28 2025-07-02 Arçelik Anonim Sirketi A dishwasher comprising a detergent dosing unit
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US12507861B2 (en) 2022-11-04 2025-12-30 Samsung Electronics Co., Ltd. Dishwasher
US12569110B2 (en) 2022-11-04 2026-03-10 Samsung Electronics Co., Ltd. Dishwasher
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KR20240064455A (ko) * 2022-11-04 2024-05-13 삼성전자주식회사 식기세척기
KR20240064459A (ko) * 2022-11-04 2024-05-13 삼성전자주식회사 식기세척기 및 그 제어 방법
KR20240064463A (ko) * 2022-11-04 2024-05-13 삼성전자주식회사 식기세척기
KR20240064456A (ko) * 2022-11-04 2024-05-13 삼성전자주식회사 식기세척기
KR20240064464A (ko) * 2022-11-04 2024-05-13 삼성전자주식회사 식기세척기
KR20240064457A (ko) * 2022-11-04 2024-05-13 삼성전자주식회사 식기세척기
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US12582284B2 (en) 2019-12-23 2026-03-24 Ecolab Usa Inc. Solid detergent dispenser for a washing machine
US12569110B2 (en) 2022-11-04 2026-03-10 Samsung Electronics Co., Ltd. Dishwasher
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US20240148227A1 (en) * 2022-11-04 2024-05-09 Samsung Electronics Co., Ltd. Dishwasher
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US12582280B2 (en) * 2022-11-04 2026-03-24 Samsung Electronics Co., Ltd. Dishwasher and control method thereof
US20240148226A1 (en) * 2022-11-04 2024-05-09 Samsung Electronics Co., Ltd. Dishwasher
US20240148218A1 (en) * 2022-11-04 2024-05-09 Samsung Electronics Co., Ltd. Dishwasher and control method thereof
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KR20220080706A (ko) 2022-06-14

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