EP3624663A1 - Wasserführendes haushaltsgerät und verfahren zum betreiben eines wasserführenden haushaltsgeräts - Google Patents
Wasserführendes haushaltsgerät und verfahren zum betreiben eines wasserführenden haushaltsgerätsInfo
- Publication number
- EP3624663A1 EP3624663A1 EP18722535.4A EP18722535A EP3624663A1 EP 3624663 A1 EP3624663 A1 EP 3624663A1 EP 18722535 A EP18722535 A EP 18722535A EP 3624663 A1 EP3624663 A1 EP 3624663A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- water
- resistance
- drive current
- movable member
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 22
- 230000001419 dependent effect Effects 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims description 33
- 238000005406 washing Methods 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000004851 dishwashing Methods 0.000 claims description 2
- 230000006870 function Effects 0.000 description 18
- 238000001514 detection method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000003909 pattern recognition Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
- A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
- A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
- A47L15/22—Rotary spraying 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
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4219—Water recirculation
- A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
-
- 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
- A47L2401/07—Status of hydraulic components, e.g. open/close status of water inlet/outlet valves, operating position of water diverters
-
- 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
- A47L2401/24—Spray arms status, e.g. detection of spray arm rotation
-
- 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
- A47L2401/30—Variation of electrical, magnetical or optical quantities
-
- 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
- A47L2501/03—Water recirculation, e.g. control of distributing valves for redirection of water flow
-
- 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
- A47L2501/20—Spray nozzles or spray arms
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
Definitions
- the present invention relates to a water-conducting household appliance and a method for operating a water-conducting household appliance.
- Waterborne domestic appliances often include movable components, such as a water diverter, which are moved during operation of a respective appliance and / or placed in predetermined positions.
- movable components such as a water diverter
- a switching cam is used, which, when the movable member is moved over a certain position, sends a signal to a control device, so that the position is determined.
- the switching cam is to be coupled to the control device. This happens, for example, via a signal cable, which increases the complexity of the device due to the additional wiring effort.
- appropriate inputs to be provided on the control device is known for example from WO 2016/096019 A1.
- an object of the present invention is to provide an improved water-conducting household appliance.
- a water-conducting household appliance in particular a dishwasher, with a movable component, an electric motor for moving the component, a control device for driving the electric motor and a load device for providing a dependent of a position of the movable member and the movement opposite resistance proposed ,
- the control device is set up to detect the drive current received by the electric motor and dependent on the resistance provided and to determine the position of the movable component as a function of the detected drive current.
- Such a water-conducting household appliance has the advantage that the position of the movable component can be determined, with an additional wiring to a position sensor and the position sensor itself can be dispensed with. As a result, in particular a complexity of the water-conducting household appliance is reduced and costs can be saved. It is thus advantageous realized a position detection of the movable member of the water-bearing household appliance without an additional cabling.
- the electric motor is designed in particular as a brushless DC motor (BLDC motor).
- BLDC motor is driven, for example, with a predetermined DC voltage.
- a direction of rotation and a speed of the BLDC motor can be controlled.
- the sense of rotation depends in particular on a polarity of the drive voltage and the speed of an amplitude or an amount of the drive voltage.
- Such a BLDC motor takes on a dependent of a load drive current. The higher the load, the greater the power of the BLDC motor. Therefore, the BLDC motor picks up higher drive current at high load than at low load.
- the control device is set up to drive the electric motor.
- the control device for example, a cable connection to the electric motor and can apply this to a predetermined drive voltage.
- the control device for this purpose has a voltage source, in particular a voltage source with controllable output voltage, such as a power supply or a transformer.
- the voltage source is in particular configured to provide the predetermined drive voltage.
- the electric motor receives a load-dependent drive current provided by the voltage source.
- the control device can be implemented in hardware and / or software technology. In a hardware implementation, the control device may be designed as a computer or as a microprocessor.
- the control device can be designed as a computer program product, as a function, as a routine, as part of a program code or as an executable object.
- the control device may be a central control device for operating the water-conducting household appliance.
- the load device comprises, in particular, a mechanical unit coupled to the movable component.
- the load device provides a resistance to movement of the movable member. This resistance can be generated for example by friction.
- the movement of the movable component has a natural resistance, which in particular depends on a bearing of the movable component.
- This resistance is referred to below as the basic resistance.
- the basic resistor may already have a position-dependent size.
- the load device is adapted to selectively change this basic resistance position-dependent. This can include both a local reduction in resistance and a local increase in resistance.
- the movable component is a spray arm of a dishwasher.
- the spray arm is rotatably mounted, wherein a rotation of the spray arm without a load device, for example, a power loss of 1, 2 W consumed.
- the electric motor provides this power when operating at a drive voltage of 12V by receiving a drive current of 0.1A.
- the load device is adapted to provide increased resistance in a range of rotational movement, for example between 0 ° -10 °, so that the power loss in this range is doubled to 2.4W, then the electric motor will take to provide that power a drive current of 0.2 A in order to maintain the rotational movement of the spray arm over this area evenly.
- the control device is set up to detect the drive current received by the electric motor and to determine therefrom the position of the movable component.
- the control device has, for example, an ammeter.
- the detection can also include storing a detected value.
- the control device is set up, in particular, to compare a detected value with a reference value, make assignments and / or perform different calculations. These calculations include, for example, determining function values and / or performing pattern recognition, in particular spectral frequency analysis. In In the above example, by doubling the drive current, it can be concluded that the position of the spray arm is in the range of 0 ° -10 °.
- the movable component is designed as a water-conducting component, in particular as a spray arm of a dishwashing machine or as a water switch.
- These components are, for example, adapted to carry out a rotary movement.
- they are for example mounted on a rotation axis, such as a shaft or drive axle, which is rotatably mounted.
- the movable component is adapted to perform a movement rotating about an axis.
- a rotational movement is in particular periodic, that is to say that the movement is repeated after a complete revolution of the movable component.
- the load device is configured to provide increased resistance at intervals of 90 ° for every 5 °.
- the drive current absorbed by the electric motor is accordingly increased four times. Increased refers in particular to the recorded drive current at positions in which the resistance is not provided by the load device or not increased, but only the base resistance acts.
- the load device is adapted to provide a dependent of a degree of rotation of the movable member resistance.
- the degree of rotation may be indicated, for example, as an angle with respect to an initial angle. Since such a rotational movement is periodic, the output angle can be freely selected.
- the load device comprises a transmission for coupling the electric motor to the movable component.
- the load device thus fulfills a dual function: on the one hand it already sets the position-dependent resistance, on the other hand it couples the electric motor with the movable component.
- the transmission is set up in the coupling of the electric motor with the movable component for reducing a rotational speed of the electric motor by a predetermined factor.
- the predetermined factor is for example also referred to as reduction.
- a reduction in particular, a drive torque for the movable component can be changed.
- a reduction is also advantageous in order to reduce a high speed of the electric motor and to increase a uniformity of the movement.
- the transmission is set up to convert a rotational movement provided by the electric motor into a linear movement.
- the load device is set up to provide the resistance according to a predetermined load function as a function of the degree of rotation of the movable component.
- the resistor thus has a resistance value as a function of the degree of rotation.
- the resistance value may increase linearly in proportion to the degree of rotation and fall back to the initial value after a full revolution.
- a clear representation of the position of the movable member which is represented here by the degree of rotation, allows for the resistance value and thus also for the drive current received by the electric motor.
- the load device is adapted to the resistance as a resistance increase and / or providing a resistance reduction with respect to a base resistance corresponding to the resistance in moving the movable member without the load device.
- the position detection in particular against interference influences, such as chaotically occurring hydrodynamic disturbances, or even mechanical disturbances, for example due to dirt particles that counteract the movement, be robust.
- Such disturbances or disturbances in particular lead to a locally increased resistance, for example because a dirt particle inhibits the movement. If such a dirt particle adheres to a certain position, the electric motor receives an increased drive current each time it passes over this position by the movable component. This could lead to incorrect position detection.
- by providing a local resistance reduction which can not originate from one of the mentioned disturbance variables, such an incorrect position detection is excluded.
- Such a reduction in resistance with respect to the basic resistance can be achieved, for example, by a load device which simultaneously couples the electric motor with the movable component as the transmission. For example, it is provided to expose a power transmission from the electric motor to the movable component in places. At these points, therefore, the movable component is not driven, which is why the basic resistance by the movable component in particular drops to zero. Therefore, the drive current received by the electric motor is also zero or at least almost zero. A deviation of zero may occur here in particular by losses which are attributable to the electric motor itself.
- control device is set up to control the electric motor in dependence on the determined position of the movable component in such a way that the movable component is moved into a predetermined position.
- a predetermined position can be determined for example by a certain degree of rotation. For example, by bringing a spray arm of a dishwasher into a predetermined position, a targeted cleaning of predefined or also be achieved dynamically certain areas in the dishwasher. For example, a cutlery basket can be approached selectively and selectively.
- control device for determining a current load function of the movable component is set up to control the electric motor for carrying out a complete movement amplitude and to detect the drive current picked up by the electric motor.
- the movable member is arranged, for example, in an environment exposed to strongly changing conditions, such as a washing chamber of a dishwasher. It may happen that the mechanical properties of the movement of the movable component, for example due to contamination, change with increasing operating time of the water-conducting household appliance.
- the drive current recorded by the electric motor during a regular execution of the movement can be detected and stored as a reference.
- the control device is in particular then also set up to determine the position of the movable component as a function of this reference.
- a complete amplitude of movement is understood to mean that the movable component reaches every position that the movable component can have exactly once.
- a respective position due to different directions of movement can also be distinguished.
- the full amplitude of movement includes the movement from the left stop to the right stop and back again.
- the control device is configured to detect a blockage of the movable component as a function of the recorded drive current of the electric motor.
- the water-conducting household appliance is designed as a dishwasher, a washing machine or a tumble dryer.
- a method for operating a water-conducting domestic appliance, in particular a dishwasher, with a movable component, an electric motor for moving the component, and a control apparatus for actuating the electric motor is proposed.
- the electric motor is driven.
- the control device acts on the electric motor with a constant DC voltage.
- a resistance dependent on a position of the movable component and opposed to the movement is provided by a load device.
- a drive current picked up by the electric motor and dependent on the resistance provided is detected. Detecting means, for example, recording, scanning or measuring.
- the position of the movable component is determined as a function of the detected drive current.
- the detected drive current is an unambiguous function of the position.
- the position can be derived or calculated directly by inverting the function from the detected drive current.
- a table can be provided in which values for the detected drive current are assigned to a position. This can also be called a look-up table.
- a computer program product which causes the execution of the method as explained above on a program-controlled device.
- a computer program product such as a computer program means, for example, as a storage medium, such as memory card, USB stick, CD-ROM, DVD, or in the form of a downloadable file provided by a server in a network or delivered. This can be done, for example, in a wireless communication network by transmitting a corresponding file with the computer program product or the computer program means.
- Fig. 1 shows a schematic perspective view of an embodiment of a water-conducting household appliance
- FIGS. 2a and 2b each show a diagram of a drive current received by an electric motor
- FIGS. 3a-3b show an embodiment of a load device in each case in one position
- FIGS. 4a and 4b show a further embodiment of a load device in each case in one position
- FIG. 5 shows a schematic block diagram of an embodiment of a method for operating a water-conducting domestic appliance.
- Fig. 1 shows a schematic perspective view of an embodiment of a water-conducting household appliance 1, which is designed here as a household dishwasher.
- the household dishwasher 1 comprises a washing container 2, which is closed by a door 3, in particular waterproof.
- a sealing device may be provided between the door 3 and the washing container 2 (not shown).
- the washing container 2 is preferably cuboid.
- the washing container 2 may be arranged in a housing of the household dishwasher 1.
- the rinsing container 2 and the door 3 can form a rinsing chamber 4 for rinsing dishes.
- the door 3 is shown in Fig. 1 in its open position.
- the rinsing container 2 has a base 7, a cover 8 arranged opposite the base 7, a rear wall 9 arranged opposite the closed door 3, and two side walls 10, 11 disposed opposite one another.
- the bottom 7, the ceiling 8, the rear wall 9 and the side walls 10, 1 1 can be made for example of a stainless steel sheet.
- the bottom 7 may be made of a plastic material.
- the household dishwasher 1 further has at least one Spülguta 12, 13, 14.
- Spülgutingn 12, 13, 14 may be provided, wherein the Spülguting 12 a lower Spülgutage or a lower basket, the Spülguting 13 an upper Spülgutage or upper basket and the Spülgutage 14 may be a cutlery drawer.
- the items to be washed 12, 13, 14 are arranged one above the other in the washing container 2.
- Each Spülgutability 12 to 14 is either in the Spül individualser 2 in orromeverlagerbar out of this.
- an electric motor 20 On the bottom 7 of the household dishwasher 1, an electric motor 20, a load device 30 and a movable member 40 are further arranged.
- the electric motor 20 is for moving the movable member 40, which is designed here as a spray arm of the household dishwasher 1, in particular at a predetermined speed, set up.
- the electric motor 20 is for this purpose with the
- Spray arm 40 mechanically coupled.
- the spray arm 40 is rotatably mounted on an axle (not shown).
- a movement of the spray arm 40 therefore corresponds to a rotation or rotational movement and the predetermined speed of a predetermined angular velocity.
- the load device 30 is coupled to the rotational movement of the spray arm 40 and adapted to oppose the rotation of a dependent of a position of the spray arm 40 resistance.
- the position of the spray arm 40 is clearly defined in particular by a degree of rotation between 0-360 °.
- the resistance opposite to the rotation causes the spray arm 40 to decelerate, which reduces an angular velocity or rotational frequency of the spray arm 40. In order to maintain the predetermined angular velocity, a higher driving power is required for a short time.
- the electric motor 20 briefly assumes an increased drive current I 0 , I 2 (see FIGS. 2 a , 2 b).
- the duration of the time interval in which the drive current is increased depends in particular on the predetermined angular velocity and on the angular range in which the resistance is increased from.
- a control device 50 is arranged on the door 3 of the domestic dishwasher 1.
- the control device 50 is configured to drive the electric motor 20 to move the spray arm 40.
- the control device 50 supplies the electric motor 20 with a predetermined drive voltage for this purpose and provides the drive current I 0 , I 2 received by the electric motor 20.
- the control device 50 is further configured to detect the drive current I 0 ,, I 2 picked up by the electric motor 20. Based on the detected drive current I 0 , I 2 , the control device 50 is further configured to determine the position of the spray arm 40. For this purpose, it can be provided that the control device 50 compares values, carries out calculations, determines function values, performs a pattern recognition, in particular a spectral frequency analysis, and / or carries out assignments.
- FIG. 2 a shows a diagram of a drive current lo recorded by an electric motor 20, as a function of a degree of rotation ⁇ of a movable component 40. It is the electric motor 20 of the domestic dishwasher 1 shown in FIG. 1, which is set up to move the spray arm 40.
- a certain basic power is required, which depends, for example, on the type of mounting of the spray arm 40.
- This basic performance reaches the electric motor 20 in this example by the inclusion of a drive current of amplitude l 0 .
- a load device 30 which opposes in a range of the degree of rotation ⁇ of the spray arm 40 of 135 ° - 180 °, an increased resistance of the movement.
- a higher power for performing the rotational movement in particular at a predetermined angular velocity, is required. Therefore, in this area, the electric motor 20 receives a higher drive current ⁇ i to provide this increased power.
- the control device 50 is configured to detect the input drive current I 0 , I ', for example as a function of the degree of rotation ⁇ of the spray arm 40, and to determine the position of the spray arm 40 in response thereto.
- the control device 50 compares the detected drive current I 0 with a value stored in a memory (not shown) that corresponds to the drive current at basic output. If the detected drive current I 0 , I 'is higher than the stored value, then the position of the spray arm 40 is in a range of 135 ° -180 ° rotation.
- the control device 50 is configured, for example, to detect a change in the detected drive current I 0 , and to determine therefrom the position of the spray arm 40. As soon as the spray arm 40 exceeds 135 °, the drive current I 0 'suddenly increases, resulting in a large positive change signal. Accordingly, a large negative change signal results when the spray arm 40 exceeds 180 °. In this example, therefore, the position of the spray arm 40 can be accurately determined at two points.
- FIG. 2 b shows a further diagram of a drive current I 0 ,, I 2 recorded by an electric motor 20 as a function of a degree of rotation ⁇ of a movable component 40.
- the electric motor 20 is that shown in FIG. 1
- Household dishwasher 1 which is adapted to move the spray arm 40. Furthermore, a load device 30 (see, for example, FIG. 1) is provided, which provides position-dependent resistance to the rotational movement of the spray arm 40.
- a load device 30 (see, for example, FIG. 1) is provided, which provides position-dependent resistance to the rotational movement of the spray arm 40.
- three load levels can be seen in FIG. 2 b, which are characterized by a respective drive current I 0 , I 2 .
- the base load corresponds to a drive current I 0
- an increased load corresponds to a drive current I
- a lowered load corresponds to a drive current I 2 .
- the drive current I 0 , I 2 received by the electric motor 20 is increased or decreased in the respective regions.
- control device 50 is therefore able to determine the position of the spray arm 40 very accurately.
- FIGS. 3a-3c show an embodiment of a load device 30, for example the load device 30 of FIG. 1, in each case in one position.
- the load device 30 in this example comprises two gears 31, 32 which mesh with each other.
- the first gear 31 is mounted on a shaft or drive axle 21 which is driven by the electric motor 20 (see FIG. 1), possibly via a transmission (not shown).
- the teeth of the first gear 31 engage with the teeth of the second gear 32, whereby a force is transmitted to the second gear 32.
- the second gear 32 is mounted on a shaft or drive axle 41 configured to drive or move a movable member 40 (see FIG. 1).
- the first gear 31 has the peculiarity that no teeth are present in a small angular range.
- Fig. 3a shows a moment in which the second gear 32 is just driven by the first gear 31. However, the first gear 31 rotates according to the shown direction of rotation, whereby the angular range of the first gear 31, in which no teeth are present, is rotated to the second gear 32 back.
- 3b shows a moment in which the angular range of the first gear 31, in which no teeth are present, the second gear 32 faces. Therefore, the second gear 32 is not driven in this position and a load for the electric motor 20 and thus also a picked up by this drive current l 0 ,, l 2 are reduced.
- the movable member 40 may also continue to move at this moment due to inertia of the movement. Preferably, however, the movement is decelerated, so that the movable member 40 is in a defined position.
- Fig. 3c shows a moment in which the first gear 31 just back into the second gear 32 engages and thus again drives.
- the load and thus also the recorded drive current I 0 , I 2 are again at the base level from this time on. It may happen that at the first moment in which the first gear 31 engages again in the second gear 32, an increased load briefly occurs when the movable member 40 has been decelerated in the meantime and is now accelerated again.
- FIGS. 4a and 4b show a further embodiment of a load device 30, for example the load device 30 of FIG. 1, in each case in one position.
- the load device 30 has in this example a concentric structure with nested cylindrical elements 33, 34, 35.
- a friction means 33 is arranged, which is fixedly connected to the drive axle 21.
- the friction agent 33 comprises, in particular, polymeric constituents.
- a friction layer 34 which in turn is arranged on the inside of a bushing 35 and fixedly connected thereto.
- the socket 35 is for example connected to an external housing (not shown) and thus immovable.
- the friction means 33 has a projection 36 which is so large that it bridges the gap between the friction means and the friction layer 34. That is, the projection 36 contacts the friction layer 34 and rubs on it. This is illustrated for example in FIG. 4a. By this friction, a rotation of the drive axle 21 is opposed to an increased resistance.
- the projection 36 may be of the same material however, it may also be provided to manufacture it from another, in particular more robust material or to apply a coating of a more robust material to it.
- the friction layer 34 has a recess 37.
- This recess 37 is dimensioned so that the projection 36, when it is aligned in the direction of the recess 37, no longer rubs on the friction layer 34. This is illustrated for example in FIG. 4b. Thus, in this orientation, that is, when the projection 36 is aligned with the recess 37, the load additionally generated by friction is eliminated.
- FIG. 5 shows a schematic block diagram of an embodiment of a method for operating a water-conducting domestic appliance 1, for example the domestic dishwasher of FIG. 1.
- an electric motor 20 is controlled by a control device 50.
- the control device 50 supplies the electric motor 20 with a predetermined drive voltage and provides a current I 0 ,, I 2 (see FIGS. 2 a , 2 b) picked up by the electric motor 20.
- a load device 30 (see FIGS. 1, 3a-3c, 4a, 4b) provides a resistance dependent on a position of a movable component 40 which is driven by the electric motor 20.
- a third method step S3 the drive current I 0 ,, I 2 picked up by the electric motor 20 and dependent on the resistance provided is detected.
- the control device 50 has a current measuring device for this purpose.
- the detection of the drive current I 0 , I 2 may further comprise storing the detected value.
- the position of the movable component 40 is determined as a function of the detected drive current I 0 , I 2 .
- the determination is carried out in particular by the control device 50, for example by comparing the detected drive current I 0 , I 2 with values stored in a table.
- the load device many other variants for the load device are conceivable.
- the comprehensive friction layer illustrated in FIGS. 4 a, 4 b it is possible to arrange friction points only at individual points so as not to increase the base load.
- different materials or coatings may be provided for the friction layer, which have different coefficients of friction and thus realize different load conditions.
- magnetic systems are also conceivable which influence a movement sequence of the movable component in a predetermined manner in a position-dependent manner by means of suitably arranged permanent magnets.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Water Supply & Treatment (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Washing And Drying Of Tableware (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017208527.4A DE102017208527A1 (de) | 2017-05-19 | 2017-05-19 | Wasserführendes Haushaltsgerät und Verfahren zum Betreiben eines wasserführenden Haushaltsgeräts |
PCT/EP2018/061648 WO2018210594A1 (de) | 2017-05-19 | 2018-05-07 | Wasserführendes haushaltsgerät und verfahren zum betreiben eines wasserführenden haushaltsgeräts |
Publications (2)
Publication Number | Publication Date |
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EP3624663A1 true EP3624663A1 (de) | 2020-03-25 |
EP3624663B1 EP3624663B1 (de) | 2022-12-14 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18722535.4A Active EP3624663B1 (de) | 2017-05-19 | 2018-05-07 | Wasserführendes haushaltsgerät und verfahren zum betreiben eines wasserführenden haushaltsgeräts |
Country Status (6)
Country | Link |
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US (1) | US11330956B2 (de) |
EP (1) | EP3624663B1 (de) |
CN (1) | CN110913740B (de) |
DE (1) | DE102017208527A1 (de) |
PL (1) | PL3624663T3 (de) |
WO (1) | WO2018210594A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102020214200A1 (de) * | 2020-11-11 | 2022-05-12 | BSH Hausgeräte GmbH | Geschirrspülmaschine, Verfahren und Computerprogrammprodukt |
CN112773291B (zh) * | 2021-01-07 | 2022-04-26 | 佛山市顺德区美的洗涤电器制造有限公司 | 用于洗碗机的控制方法、处理器、控制装置和洗碗机 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB482089A (en) * | 1936-06-20 | 1938-03-23 | British Thomson Houston Co Ltd | Improvements in and relating to washing apparatus |
KR100822467B1 (ko) * | 2004-03-16 | 2008-04-16 | 아세릭 에이. 에스 | 식기세척기 및 그의 제어방법 |
DE102007017274A1 (de) | 2007-04-12 | 2008-10-30 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zur Lageerkennung eines Verschlusselements in einer Wasserweiche |
DE102007041299A1 (de) * | 2007-08-31 | 2009-03-05 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Betreiben einer Geschirrspülmaschine |
DE102007041313A1 (de) * | 2007-08-31 | 2009-03-05 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Betreiben einer Geschirrspülmaschine |
DE102008029910C5 (de) * | 2008-06-24 | 2020-03-05 | BSH Hausgeräte GmbH | Verfahren zur Lastzustandserkennung einer Pumpe |
JP5146331B2 (ja) * | 2009-01-19 | 2013-02-20 | パナソニック株式会社 | 食器洗い機 |
US8192551B2 (en) * | 2009-02-20 | 2012-06-05 | Whirlpool Corporation | Obstacle sensing spray arm for a dishwashing machine |
PL2916707T3 (pl) * | 2012-11-08 | 2020-02-28 | Electrolux Home Products Corporation N.V. | Wykrywanie stanu roboczego zmywarki |
KR101667589B1 (ko) * | 2014-06-12 | 2016-10-28 | 엘지전자 주식회사 | 식기세척기 및 식기세척기의 제어방법 |
US10194782B2 (en) | 2014-12-18 | 2019-02-05 | Electrolux Appliances Aktiebolag | Dishwasher comprising a spray arm arrangement |
-
2017
- 2017-05-19 DE DE102017208527.4A patent/DE102017208527A1/de not_active Withdrawn
-
2018
- 2018-05-07 PL PL18722535.4T patent/PL3624663T3/pl unknown
- 2018-05-07 CN CN201880047515.3A patent/CN110913740B/zh active Active
- 2018-05-07 WO PCT/EP2018/061648 patent/WO2018210594A1/de active Application Filing
- 2018-05-07 US US16/603,872 patent/US11330956B2/en active Active
- 2018-05-07 EP EP18722535.4A patent/EP3624663B1/de active Active
Also Published As
Publication number | Publication date |
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DE102017208527A1 (de) | 2018-11-22 |
CN110913740B (zh) | 2023-03-10 |
WO2018210594A1 (de) | 2018-11-22 |
CN110913740A (zh) | 2020-03-24 |
US11330956B2 (en) | 2022-05-17 |
US20200113407A1 (en) | 2020-04-16 |
PL3624663T3 (pl) | 2023-02-27 |
EP3624663B1 (de) | 2022-12-14 |
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