EP3653782B1 - Sèche-linge pourvu de capteur d'accélération et son procédé de fonctionnement - Google Patents
Sèche-linge pourvu de capteur d'accélération et son procédé de fonctionnement Download PDFInfo
- Publication number
- EP3653782B1 EP3653782B1 EP19203310.8A EP19203310A EP3653782B1 EP 3653782 B1 EP3653782 B1 EP 3653782B1 EP 19203310 A EP19203310 A EP 19203310A EP 3653782 B1 EP3653782 B1 EP 3653782B1
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- Prior art keywords
- sensor
- laundry
- drum
- sensors
- tumble dryer
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Images
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
-
- 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
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—Humidity
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—Humidity
- D06F2103/10—Humidity expressed as capacitance or resistance
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/12—Temperature
-
- 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
- D06F2103/24—Spin speed; Drum movements
-
- 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
- D06F2103/28—Air properties
- D06F2103/34—Humidity
-
- 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
- D06F2103/38—Time, e.g. duration
-
- 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
- D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/04—Signal transfer or data transmission arrangements
- D06F34/05—Signal transfer or data transmission arrangements for wireless communication between components, e.g. for remote monitoring or control
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
- D06F37/06—Ribs, lifters, or rubbing means forming part of the receptacle
-
- 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
- D06F58/00—Domestic laundry dryers
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
- D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
Definitions
- the invention relates to a clothes dryer with an acceleration sensor, with which improved control is possible, and a method for its operation.
- the invention relates in particular to a clothes dryer with a control device, a drum for holding items of laundry, in which at least one laundry carrier is arranged, with a sensor arrangement with at least two sensors, a self-sufficient energy supply and an interface for wireless data communication being located in the laundry carrier, and at least one Evaluation unit for sensor signals of the sensor arrangement, with the control device and sensor arrangement being set up to communicate with one another wirelessly.
- tumble dryers are aimed at making operation safer and easier for a user and at continually improving the drying programs carried out in them in terms of performance, time, energy consumption and environmental compatibility.
- the ability to determine operationally relevant parameters at any time is essential.
- sensors are used in tumble dryers for this purpose, for example resistive or capacitive sensors, which allow the determination of residual moisture in laundry items via a resistance measurement or conclusions about the process by measuring the temperature and/or the humidity of a process air used for drying Allow drying program so that, for example, the end of the program can be displayed.
- the use of pressure sensors or acceleration sensors is already known, for example to determine a load amount.
- the disadvantage is that such sensors are usually placed at different locations in the tumble dryer, so that a high degree of inaccuracy in the measured sensor signals can result from the sensors detecting different measuring points. Sensors also often require a lot of installation space, so that the arrangement cannot be designed flexibly and there is usually a large distance between the actual measurement object and the sensors the sensor signal is then inaccurate. It would therefore be desirable if a sensor arrangement could be implemented in as small a space as possible.
- the publication DE 10 2012 217 975 A1 describes a household appliance with a control device for controlling operating processes of the household appliance, and with a battery-free electronic sensor unit for detecting at least one operating parameter of the household appliance, the sensor unit having a generator for providing electrical energy for the sensor unit from non-electrical energy and a transmitter which is designed to wirelessly transmit a radio signal characterizing at least one operating parameter to the control device.
- the generator is a thermoelectric generator with two thermal contact surfaces, which is designed to provide electrical energy based on a temperature difference between the contact surfaces.
- the publication EP 1 895 043 A1 describes a washing machine and/or a tumble dryer, in particular for household use, equipped with a rotating drum for holding items of laundry to be washed and/or dried, and with control means which can measure at least one functional parameter of the machine, for example the moisture of the items of laundry .
- the measuring equipment in question is connected to the control panel in order to operate it in accordance with the detected measured variable.
- the measuring equipment includes a generator for electrical energy, which is directly associated with the rotating drum and communicates wirelessly with the machine's control panel.
- the electric power generator comprises a permanent magnet sliding freely in a tube made of non-conductive material, on the outer surface thereof at least one coil is wound, which is connected to an electrical panel capable of generating a voltage signal and send to the machine control panel.
- the publication EP 1 997 951 A1 describes a washing machine comprising a rotating laundry drum with a front access opening.
- the washing machine further comprises an electrical device adapted to the drum and an electrical generator, which is built into the drum and uses the rotation of the drum to generate the electrical energy necessary to operate the electrical device.
- the publications DE 102 42 144 A1 and WO 2004/022836 A2 describe a tumble dryer with a rotating drum for receiving laundry to be dried, the drum having a sensor device for determining a physical value inside the drum, the sensor device being connected to a control of the tumble dryer in a signal-transmitting manner, and the signal-transmitting connection being wireless and contactless is trained.
- the publication DE 10 2006 053 274 A1 describes a method for determining the amount of laundry in a loading space with an air outlet of a tumble dryer, in particular an exhaust air tumble dryer, wherein the absolute humidity in the air outlet from the loading space is measured and the amount of load in the loading space by determining the maximum value and / or the course of the absolute Humidity in the air outlet from the cargo space is determined.
- the publication WO 2013/182402 describes a washing machine or dryer comprising a drum into which laundry items are placed, one or more baffles mounted on the inner surface of the drum, one or more sensors placed in the drum, and a main control unit , which controls washing and drying operations.
- An additional control unit is arranged within the deflection part, which converts the analog signals received from the sensors into digital signals and transmits these signals to the main control unit.
- a temperature sensor pointing into the interior of the drum can be arranged on the surface of the deflection part.
- the additional control unit can carry out the wireless transmission of signals.
- the publication WO 2018/015214 describes a household appliance with a control device and at least one sensor node, comprising at least one sensor, at least one evaluation unit, a self-sufficient power supply and an interface for wireless data communication, wherein the control device and the sensor node are set up to communicate with one another wirelessly, and wherein the at least one sensor is a micromechanical sensor and the at least one sensor node is set up in such a way that it is controlled by the control device can be recorded, as well as independently detecting, evaluating and transmitting at least one measurement signal to the control device.
- the US 2016 330 572 A1 describes a wireless data transmission device between sensors that are attached to the driver in the drum of a tumble dryer.
- the EP 3 073 008 A1 describes electrodes installed in the drum of a tumble dryer, which are capacitively coupled to fixed secondary electrodes in the device and can therefore transmit measured values without contact, especially with radio frequency coupling, when the drum is in a certain position.
- the drum of the laundry treatment device additionally has at least one laundry carrier and the distance sensor is arranged in the at least one laundry carrier.
- a further sensor is additionally arranged in a laundry carrier - in addition to the distance sensor - selected from the group consisting of a moisture detection sensor, a temperature sensor, a pressure sensor, a Accelerometer and an optical sensor.
- the laundry treatment device can also have a self-sufficient energy supply unit.
- a tumble dryer with improved control.
- improved monitoring and control of a drying program should be made possible, for which in particular the moisture of the laundry items and/or the load of the drum with laundry items should be able to be determined.
- a method suitable for operating this tumble dryer should be provided.
- the subject of the invention is therefore a tumble dryer with a control device, a drum for holding items of laundry, in which at least one laundry carrier is arranged, with a sensor arrangement with at least two sensors, a self-sufficient energy supply unit and an interface for wireless data communication being located in the laundry carrier, and at least an evaluation unit for sensor signals of the sensor arrangement, wherein the control device and sensor arrangement are set up to communicate with one another wirelessly, and an acceleration sensor and at least one electrode of a conductivity sensor and / or an air humidity sensor are arranged in the laundry carrier, and the control device is set up to rotate the Drum to determine a position of the laundry carrier, so that the sensor signals measured by the conductivity sensor and / or air humidity sensor can be assigned to the position of the laundry carrier, wherein at least two sensors of the sensor arrangement are based on the same measuring principle and are arranged along the laundry carrier, and wherein the measuring principle is selected is among the physical properties temperature, humidity, pressure and/or conductivity, so that at least two sensors are each a temperature sensor, humidity sensor, pressure sensor,
- the tumble dryer can be a dryer itself or a washer-dryer, i.e. a device that combines the functions of a washing machine and a tumble dryer.
- a capacitive sensor can be used as an acceleration sensor.
- a sensor based on a resistance stress strip can also be used. Both single-axis sensors and sensors with two or more measuring axes can also be used.
- the acceleration sensor is a sensor with three measuring axes; in particular a micromechanical acceleration sensor with three measuring axes.
- signs of wear or imbalance in a tumble dryer according to the invention with dynamic components, for example a drum can also be detected by evaluating the individual measuring axis signals and their frequency components.
- both the load quantity and the slip of the drum relative to a drive motor and an imbalance of the drum can also be advantageously calculated and, if necessary, compensated for by the control device.
- the position and speed of the drum can then be detected via the z measuring axis signal.
- the acceleration signals can also be used to detect aging effects, such as wear of the drum bearings or aging of the drive train, and if necessary, information can then be output to a user via the control device.
- a degree of loading of the drum with laundry items can be measured precisely.
- the laundry items collide with the laundry carrier and in this way generate an acceleration pulse, which is detected by the acceleration sensor.
- the degree of loading can then be determined from the type and level of such a sensor signal. A variation over several different speeds increases the accuracy of the measurement.
- At least two electrodes are used as conductivity sensors, which are arranged on at least one laundry carrier so that the conductivity can be measured between them.
- the two electrodes can also be used on different laundry carriers be arranged. If the measured conductivity between the electrodes is comparatively low, it can be concluded that there are no damp items of laundry between them.
- the loading of the drum with damp laundry items can be determined based on corresponding sensor signals.
- the counter electrode of the conductivity sensor is arranged on the same laundry carrier or a different laundry carrier.
- a drum shell of the drum is used as the counter electrode of the conductivity sensor.
- a clothes dryer is particularly preferred in which the control device is set up to determine laundry moisture and/or load of laundry items on the basis of the sensor signals measured by the conductivity sensor and/or air humidity sensor.
- the control device is set up to determine laundry moisture and/or load of laundry items on the basis of the sensor signals measured by the conductivity sensor and/or air humidity sensor.
- the drum will be filled differently. This influences the laundry load when the drum rotates, and the speed of rotation of the drum also influences the laundry load. If the drum rotates at a constant speed, the amount of laundry produced depends on the amount of laundry items and the moisture content of the laundry. When the drum rotates, areas of the drum casing and the laundry carriers come into contact with the laundry items at different times.
- the sensor signals of the acceleration sensor are evaluated so that the sensor signals measured by the conductivity sensor and/or air humidity sensor are assigned to the position of the laundry carrier can be.
- one of the measuring axes of the acceleration sensor is arranged parallel to the rotation axis of the drum, so that from the two values Acceleration in the other two directions can be inferred from the angular position of the drum and thus the position of the relevant laundry carrier.
- the strength of these sensor signals at this position can be used to determine the load of laundry items and their moisture content.
- the temporal periodicity of the measured sensor signals can also be used, particularly if the rotational speed of the drum is known.
- At least two sensors of the sensor arrangement are based on the same measuring principle and are arranged along the laundry carrier. This further improves the accuracy of the determination of laundry moisture and load of laundry items that is possible with the invention.
- Laundry carriers are generally arranged essentially parallel to an axis of rotation of the drum, so that the term “along the laundry carrier” is to be interpreted to mean that the arrangement is essentially parallel to the axis of rotation of the drum.
- the sensors are at a distance from one another at least in the direction of the laundry carrier, this distance generally being determined based on projections of the locations of the sensors onto an imaginary axis that runs parallel to the axis of rotation of the drum.
- Three sensors along the laundry carrier therefore define two distances, namely a first distance d 1 between a first sensor and a second sensor and a second distance d 2 between the second sensor and a third sensor.
- the distances d 1 and d 2 can be the same or different. This applies accordingly to the case of four or more sensors for further distances d n (n>2).
- the measuring principle is selected from the physical properties of temperature, humidity, pressure and/or conductivity, so that at least two sensors are each a temperature sensor, air humidity sensor, pressure sensor, conductivity sensor or any combination of these.
- sensors there may be a pair of temperature sensors and a pair of humidity sensors.
- the optionally used temperature sensor is a micromechanical temperature sensor which consists of an n-conducting silicon crystal which is manufactured using planar technology.
- multiple sensors are used as sensors, which are based on several measuring principles at the same time.
- Such space-saving dual or triple sensors are known per se.
- the at least two sensors of the tumble dryer are preferably modular components with a size in the range of 2-4 x 2-4 x 0.5-1.5 mm 3 each.
- the sensors are generally designed as micromechanical sensors. Since micromechanical sensors are particularly small elements, i.e. require little installation space, two or more sensors can be combined, creating a dual sensor or a triple sensor, for example. For this purpose, the sensor can in particular have a modular structure.
- the small-scale design of micromechanical sensors also offers another decisive advantage. If micromechanical sensors are used, all sensors can carry out measurements at the same location. The sensor signals then all have a common local reference point. This allows parameters obtained from individual sensor signals to be correlated with one another particularly precisely.
- the sensor arrangement comprising the at least one micromechanical sensor, the interface for wireless data communication and the Autonomous energy supply unit and, if necessary, the evaluation unit can be implemented in a particularly small installation space.
- At least one sensor, for example a micromechanical sensor, of the sensor arrangement arranged in the laundry carrier is a pressure sensor with a membrane. Then, a pressure that the laundry items exert on the membrane when they come into contact with the laundry carrier can advantageously be transferred to the pressure element in the pressure sensor. This can also improve the determination of the load of laundry items on the drum. As the drum rotates, the items of laundry collide with the laundry carrier and in this way generate pressure on the laundry carrier, which can be detected by a pressure sensor. From the type and level of such a measurement signal, the degree of loading can then be determined in an alternative way.
- At least one sensor is a pressure sensor, in particular a micromechanical pressure sensor, then in the event that the pressure sensor senses a sensor signal when the tumble dryer is switched off after items of laundry have been placed in the drum, the at least one sensor arrangement can transmit the evaluated sensor signal to the control device and initiate this to turn on the tumble dryer.
- the present invention enables tracking of a drying program by evaluating sensor signals from sensors that are arranged in the direction of the laundry carrier or in the direction of the axis of rotation of the drum.
- the process air flowing in a so-called process air duct enters the drum from behind after being heated by a heating device that is generally present in the tumble dryer.
- the originally very warm and dry process air cools down and at the same time absorbs moisture from the laundry items being dried.
- the laundry items are generally pushed forward toward an access door. The items of laundry closest to the incoming process air generally become the strongest dried.
- At least three sensors are arranged along the at least one laundry carrier.
- these sensors are based on the same measuring principle in order to be able to track the change in a property such as humidity in the direction of the axis of rotation or the laundry carrier as accurately as possible.
- the sensors discussed herein are generally located on the surface of at least one laundry carrier. However, it can be provided to also arrange one or more sensors inside the laundry carrier(s), for example a temperature sensor to monitor the proper functioning of electronic components.
- sensors arranged in the laundry carriers in the drum can optionally be arranged in the process air duct, for example at the drum inlet and/or at the drum outlet.
- the sensors can be based on different measuring principles, e.g. temperature, humidity, pressure, although dual and triple sensors can also be used. These sensors, which are arranged outside the drum, can also contribute to better monitoring of a drying program.
- a tumble dryer is also preferred in which the control device is set up to control the loading of the laundry on the basis of the sensor signals measured by the sensors and/or the local gradients of the sensor signals in the direction of the laundry carrier Drum with laundry items and/or to determine the degree of drying of the laundry items.
- the control device is set up to control the loading of the laundry on the basis of the sensor signals measured by the sensors and/or the local gradients of the sensor signals in the direction of the laundry carrier Drum with laundry items and/or to determine the degree of drying of the laundry items.
- the drum can be filled differently depending on the amount of laundry items in the drum, i.e. the load of the drum, and the moisture of the laundry items.
- the drum With the preferential entry of the process air on a rear wall of the drum, the laundry items are pushed towards a dryer door. Depending on the amount of laundry in the drum, only a front area of the drum can be filled at this drum entry.
- the laundry items are dried more quickly at the drum inlet than at the drum outlet.
- the invention makes it possible to detect this load- and moisture-dependent degree of filling and the moisture of the laundry items, i.e. their degree of dryness, as a function of the drum depth, i.e. as a function of a point along the laundry carrier.
- the drying status of the laundry and the load quantity can be determined even more precisely and a drying program can therefore be designed more precisely.
- the control device is set up to take into account the strength of the air flow entering the drum in order to determine the load of the drum with laundry items and/or the degree of drying of the laundry items.
- the strength of the air flow includes both the quantity and flow speed of the process air.
- the strength of the air flow can be adjusted via the power of a fan in the drying channel of the tumble dryer.
- the laundry dryer has at least two laundry carriers in which there is a sensor arrangement with at least two sensors, a self-sufficient energy supply and an interface for wireless data communication.
- the control device of the tumble dryer is set up to be based on the Sensor arrangements in the at least two laundry carriers measured sensor signals and / or the local gradients of the sensor signals in the direction of the laundry carrier, taking into account the rotational speed of the drum, to determine the loading of the drum with laundry items. If the at least two laundry carriers each have an acceleration sensor, their local positions can also be taken into account during rotation of the drum.
- a tumble dryer is preferred in which the at least one sensor arrangement is set up to be controlled by the control device and/or can independently measure, evaluate and transmit at least one sensor signal to the control device.
- wireless communication between the control device and the at least one sensor arrangement is preferably possible in both directions.
- a set of sensor signals that is independently detected by the sensor arrangement and then evaluated can be transmitted to the control device.
- the control device can preferably also transmit a signal to the sensor arrangement, for example to query a sensor signal.
- the control device is preferably set up to carry out an action in the tumble dryer based on a sensor signal transmitted by the at least one sensor arrangement or an evaluation thereof.
- action means any possibility of controlling the tumble dryer according to the invention.
- An action can, for example, be the implementation of a drying program or even a subsection of a drying program.
- a drying program in the sense of the invention can be a drying program implemented at the factory in a tumble dryer, one or more additional options or even a user-defined drying program.
- the term drying program is therefore to be interpreted broadly according to the invention.
- an action within the meaning of the invention can also be the mere switching on or off of the tumble dryer, the switching on or off of a heater of the tumble dryer or a process air blower or the variation of their power, the output of a display on a control element of the Tumble dryer or an acoustic signal for the output of information to a user.
- control device and the at least one sensor arrangement are set up to communicate data wirelessly.
- the at least one sensor arrangement and the control device and/or the evaluation unit are set up to communicate with one another wirelessly via a low-power Bluetooth connection.
- the connection can be implemented in all possible ways, for example via individual radio interfaces or via interfaces in the evaluation unit and the control device.
- the at least one laundry carrier comprises a self-sufficient energy supply unit.
- autonomous energy supply unit used herein means that the energy supply unit is set up to generate energy independently, i.e. independently of the energy supply to the tumble dryer.
- the sensor arrangement can independently detect, evaluate and transmit a sensor signal to the control device even when the tumble dryer is switched off.
- the type of energy supply is not restricted.
- the energy supply can also be thermoelectric, inductive or piezoelectric, for example. In principle, any solution known from the prior art is possible here.
- batteries or accumulators can also be used to supply energy.
- the at least one thermopile element can be arranged in or on the laundry carrier. In contact with warm laundry, for example, or through warm process air, a temperature difference can then be generated at the two ends of the thermopile element. The voltage difference generated can then be tapped at one end.
- the energy supply unit comprises a magnetic induction element, for example a coil and a magnet
- the coil can be arranged in a laundry carrier and the magnet can be attached to the housing of the tumble dryer so that the drum movement moves the coil past the magnet at a defined distance can be.
- the induction current generated in this way can then be tapped.
- a magnetic flux collector can also be used to transmit the magnetic fields to the coil through the opening in the drum.
- the magnet can also be arranged in the laundry carrier and can be moved in such a way that it can move past the adjacent coil when the drum moves up and down.
- the energy supply unit can also be advantageously completely integrated into the laundry customer.
- the self-sufficient energy supply unit comprises at least one piezo element for generating energy and is set up to generate electrical energy for the sensor arrangement, the interface for wireless data communication and/or the evaluation unit by mechanically deforming at least one piezo element.
- the invention thus advantageously exploits the so-called piezoelectric effect, in which electrical charge is generated by mechanical deformation.
- the optional at least one piezo element is a piezoceramic bending element.
- the shape of the bending element is not restricted according to the invention; it can have any geometric shape. However, it is preferred if the bending element is designed to be flat, particularly preferably in a rectangular shape.
- the size and deflection of the bending element are also not restricted according to the invention. They will generally depend on the placement of the piezo element, as well as the mechanical load applied to the piezo element.
- a piezoceramic bending element generally includes a bending structure and electrodes.
- the bending structure can be implemented in different ways, for example it can be a layer structure.
- the bending structure can also be a combination of one or two piezoceramic components, which can also have at least one intermediate layer.
- the piezoceramic components can also consist of individual layers and/or multilayers, the layer thickness of which is also not restricted.
- the piezoceramic material is also not restricted according to the invention; it can be, for example, lead zirconate titanate, but any other piezoceramic can also be used.
- the optionally used piezoceramic bending element has a piezoceramic layer with a layer thickness of 100 to 500 ⁇ m.
- the layer thickness is preferably in the range from 150 to 250 ⁇ m, and is, for example, 200 ⁇ m.
- This layer is then preferably designed as a plate and has a surface electrode on the top and bottom, as well as a contact and two electrical connections.
- the at least one optional piezo element is arranged in or on the laundry carrier in such a way that it can be deformed by the impact of laundry items on at least one laundry carrier during the rotation of the drum.
- the energy supply unit is completely integrated into the laundry carrier, so that the sensor arrangement can be manufactured together with the energy supply unit as a compact modular component.
- tumble dryers also have at least one display unit which can display information in the form of texts, images and/or characters, in color and/or black and white, static and/or animated. Information and/or warnings can preferably be output to a user via the display unit become.
- the display unit is particularly preferably an external display unit, for example the touchscreen of a smartphone or tablet PC.
- the tumble dryer includes an evaluation unit for evaluating the sensor signals.
- This can be arranged in the laundry carriers or somewhere else in the tumble dryer.
- the type and design of the evaluation unit are not restricted. For example, it can be part of the at least one sensor, i.e. implemented in it. However, it can also be an independent processor unit. In any case, the evaluation unit is set up to evaluate sensor signals and transmit them to the control device.
- evaluation routines are also stored in the evaluation unit and the evaluation unit is set up not only to evaluate, but also to evaluate sensor signals measured by the sensor arrangement(s) based on, for example, a target/actual comparison and/or on the basis of calibration values/curves to be evaluated and only transmitted to the control device if this is intended according to the evaluation. For example, if a stored setpoint is exceeded or undershot by the actual value.
- the tumble dryer according to the invention preferably has an additional interface for wireless data transmission, whereby the tumble dryer can then preferably be operated using an external control unit, for example a smartphone and/or a tablet PC, preferably via an app.
- the tumble dryer according to the invention is then also integrated into a home network with at least one other household appliance.
- the laundry carrier additionally has an energy storage device.
- the energy storage is not restricted and can be technically implemented in any way, for example, it can be an accumulator.
- the energy storage can also be implemented, for example, in a piezo element or can be designed independently.
- the energy storage is used by the energy supply unit to store the energy generated and, if necessary, to supply the sensor arrangement and, if necessary, evaluation unit etc. with electrical energy.
- the control device can then further process the evaluation results obtained in a suitable form and/or display them to a user of the tumble dryer on a display unit that is usually present.
- a drying program can be modified for more efficient and/or uniform drying.
- a drying end can also be displayed more precisely on the display unit of the tumble dryer.
- a fan In the process air duct of a tumble dryer there is generally a fan to transport the process air.
- a fan is therefore arranged in a process air duct of the tumble dryer and the following step (c) is carried out before step (d): (c) measuring the strength of the air flow entering the drum and taking the strength of the measured air flow into account in the evaluation in the subsequent step (d).
- step (b) can preferably be initiated both by the control device and can also be carried out independently by the sensor arrangement, without initiation by the control device.
- the control device can therefore, for example, transmit a signal for detecting sensor signals to the at least one sensor arrangement and thereby initiate step (b) of the method according to the invention.
- a routine can also be stored in the evaluation unit to independently initiate a measurement and thereby initiate step (b) of the method according to the invention.
- the invention has numerous advantages. Through the location-dependent measurement of various physical properties in the drum of a tumble dryer, be it depending on the location of the laundry carrier when the drum rotates or, in embodiments of the invention, additionally in the direction of the laundry carrier, it is possible to optimize drying programs even better by precise the degree of drying of the laundry items and the loading of the drum with laundry items can be closed. This information can also be transmitted conveniently, namely wirelessly, from the drum.
- the use of micromechanical sensors can Sensor arrangement can be designed to be particularly flexible and space-saving. A variety of different sensor types can be implemented in the sensor arrangement in variable numbers. It is also particularly advantageous that the small-scale design of micromechanical sensors means that many measurement signals can be detected in a location-related manner for the same measuring point.
- Figure 1 shows a vertical section through a tumble dryer according to the invention, which is designed as a condensation dryer.
- Figure 2 shows a section of a drum, in which a laundry carrier with a sensor system arranged therein is shown enlarged.
- Figure 1 shows a vertical section through a tumble dryer according to the invention, which is designed as a condensation dryer, with the arrows indicating the flow direction of the process air.
- a tumble dryer according to the invention, which is designed as a condensation dryer, with the arrows indicating the flow direction of the process air.
- Other embodiments are conceivable.
- the tumble dryer 1 shown has a drum 3 which can be rotated about a horizontal axis for receiving items of laundry to be dried, not shown here, within which drivers 5, 22 are mounted for moving items of laundry during rotation of the drum.
- the process air is passed through the drum 3 in the process air duct 2 by means of a process air blower 6 via an air-air heat exchanger 14 and an electric heater 4. Air heated by the electric heater 4 is passed through the drum inlet 19 from behind, ie from the side of the drum 3 opposite a door 12, through its perforated bottom into the drum 3.
- the moisture-laden process air flows through the filling opening of the drum 3 through a lint filter 11 within the door 12 closing the filling opening.
- the process air flow in the door 12 is then redirected downwards through the drum outlet 18 into the process air duct 2 and to the air-air heat exchanger 14, through which cooling air can be conveyed in a cooling air duct 15 by means of a cooling air fan 16.
- a cooling air fan 16 As a result of cooling, a more or less large part of the moisture absorbed from the laundry items by the process air condenses in the air-air heat exchanger 14 and is collected in a condensate tray 17.
- the dryer 1 is controlled via a control device 8, which can be regulated by the user via an operating unit 7.
- a sensor arrangement 23 each with four sensors 24, 25, 26, 27, here designed as triple sensors, as well as an acceleration sensor 31, a self-sufficient energy supply unit 28, an interface 29 for wireless communication and an evaluation unit 30 for sensor signals from the sensor arrangement 23, with the control device 8 and sensor arrangement 23 being set up to communicate with one another wirelessly.
- the communication can take place via the intermediate evaluation unit 30.
- the triple sensors 24,25,26,27 of the sensor arrangement are based on the same measuring principles (temperature, pressure, humidity) and are arranged along the laundry carriers 5,22.
- the sensors 24 and 25 can also be designed as conductivity sensors, whereby an electrode 24 and a counter electrode 25 can be used. Electrode 24 and counter electrode 25 can be arranged in the same laundry carrier or on different laundry carriers.
- the acceleration sensor 31 using the acceleration sensor 31, it can be determined based on the measured sensor signals whether a laundry carrier located in a certain angular position is still in contact with or near laundry items.
- two further sensors are arranged at the drum inlet and at the drum outlet in order to provide further sensor signals for an even more precise design of a drying program.
- two triple sensors 9, 10, namely a triple sensor 9 at the drum output 18 and a triple sensor 10 at the drum input 19, are connected to the control device 8.
- the triple sensors can each measure a relative humidity, a temperature and the air pressure of the process air and thus provide important additional sensor signals so that the residual moisture of the laundry items and in particular also a load of the drum 3 with laundry items can be determined even better.
- a time measuring device 20 is also present in the condensation dryer.
- the process air blower 6 and the drum 3 are driven by the drive motor 13.
- the drive motor 13 in this embodiment is a brushless direct current motor (BLDC).
- a display unit 21 enables the display of a remaining running time of the drying program with regard to a residual moisture value of the laundry items selected by the user, for example iron dry, the display of the determined load or other states of the tumble dryer or the display of the status of the drying program, for example in a color-differentiated form.
- Fig. 2 shows a section of a drum, in which a laundry carrier with a sensor system arranged therein is shown enlarged.
- the detail which in particular is a sectional view through part of a drum of the tumble dryer 1 from Fig. 1 is, shows a laundry carrier 5, 22 arranged on the drum with a sensor arrangement with a self-sufficient energy supply unit 28. Of the sensor arrangement, only an acceleration sensor 31 and a triple sensor 24 (pressure, temperature, humidity) are visible in this sectional view.
- the laundry carrier 9, 22 also contains an evaluation unit 30 and a low-power Bluetooth interface 29 for wireless data transmission.
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Claims (13)
- Sèche-linge (1) avec un dispositif de commande (8), un tambour (3) pour l'accueil du linge, dans lequel au moins un élément d'entraînement du linge (5, 22) est disposé, dans lequel un agencement de capteurs (23) avec au moins deux capteurs (24, 25, 26, 27, 31), une unité d'alimentation autarcique (28) et une interface (29) de communication sans fil se trouvent dans l'élément d'entraînement du linge (5, 22), et au moins une unité d'évaluation (30) pour les signaux de capteur de l'agencement de capteurs (23), dans lequel le dispositif de commande (8) et l'agencement de capteurs (23) sont aménagés afin de communiquer sans fil l'un avec l'autre, et dans lequel un capteur d'accélération (31) et au moins une électrode d'un capteur de conductivité (24, 25) et/ou un capteur d'humidité de l'air (26) sont disposés dans l'élément d'entraînement du linge (5, 22), caractérisé en ce que le dispositif de commande (8) est aménagé afin de déterminer, en présence d'une rotation du tambour (3), une position de l'élément d'entraînement du linge (5, 22), de sorte que les signaux de capteur mesurés par le capteur de conductivité (24, 25) et/ou le capteur d'humidité de l'air (26) peuvent être affectés à la position de l'élément d'entraînement du linge (5, 22), dans lequel au moins deux capteurs (24, 25, 26, 27) de l'agencement de capteurs (23) se fondent sur le même principe de mesure et sont disposés le long de l'élément d'entraînement du linge (5, 22), et dans lequel le principe de mesure est sélectionné parmi les propriétés physiques que sont la température, l'humidité de l'air, la pression et/ou la conductivité, de sorte qu'au moins deux capteurs sont respectivement un capteur de température, un capteur d'humidité de l'air, un capteur de pression, un capteur de conductivité ou une quelconque combinaison de ces derniers.
- Sèche-linge (1) selon la revendication 1, caractérisé en ce que le capteur d'accélération (31) est un capteur d'accélération micromécanique (31) avec trois axes de mesure.
- Sèche-linge (1) selon la revendication 1 ou 2, caractérisé en ce que la contre-électrode (25) du capteur de conductivité (24, 25) est disposée sur le même élément d'entraînement du linge (5) ou sur un autre élément d'entraînement du linge (22).
- Sèche-linge (1) selon la revendication 1 ou 2, caractérisé en ce qu'un manteau de tambour du tambour (3) est utilisé comme contre-électrode du capteur de conductivité (24, 25).
- Sèche-linge (1) selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif de commande (8) est aménagé afin de déterminer, au moyen des signaux de capteur mesurés par le capteur de conductivité (24, 25) et/ou le capteur d'humidité (26), une humidité du linge et/ou un chargement du tambour (3) en linge.
- Sèche-linge (1) selon l'une des revendications 1 à 5, caractérisé en ce qu'au moins trois capteurs (24, 25, 26, 27) sont disposés le long de l'au moins un élément d'entraînement du linge (5, 22).
- Sèche-linge (1) selon l'une des revendications 1 à 6, caractérisé en ce que des capteurs multiples, qui se fondent simultanément sur plusieurs principes de mesure, sont utilisés comme capteurs.
- Sèche-linge (1) selon l'une des revendications 1 à 7, caractérisé en ce que le dispositif de commande (8) est aménagé afin de déterminer, au moyen des signaux de capteur mesurés par les capteurs (24, 25, 26, 27) et/ou des gradients spatiaux des signaux de capteur en direction de l'élément d'entraînement du linge (5, 22), le chargement du tambour (3) en linge et/ou le degré de séchage du linge.
- Sèche-linge (1) selon la revendication 8, caractérisé en ce que le dispositif de commande (8) est aménagé afin de tenir compte de la puissance de l'écoulement d'air arrivant dans le tambour (3) afin de déterminer le chargement du tambour (3) en linge et/ou le degré de séchage du linge.
- Sèche-linge (1) selon l'une des revendications 1 à 9, caractérisé en ce qu'il présente au moins deux éléments d'entraînement du linge (5, 22), dans lesquels se trouvent un agencement de capteurs (23) avec au moins deux capteurs (24, 25, 26, 27, 31), une unité d'alimentation autarcique (28) et une interface (29) pour la communication sans fil de données.
- Sèche-linge (1) selon l'une des revendications 1 à 10, caractérisé en ce que l'au moins un agencement de capteurs (23) et le dispositif de commande (8) et/ou l'unité d'évaluation (30) sont aménagés afin de communiquer l'un avec l'autre via une liaison sans fil Bluetooth à basse énergie.
- Procédé d'exploitation d'un sèche-linge (1) avec un dispositif de commande (8), un tambour (3) pour l'accueil du linge, dans lequel au moins un élément d'entraînement du linge (5, 22) est disposé, dans lequel un agencement de capteurs (23) avec au moins deux capteurs (24, 25, 26, 27, 31), une unité d'alimentation autarcique (28) et une interface (29) de communication sans fil de données se trouvent dans l'élément d'entraînement du linge (5, 22), et au moins une unité d'évaluation (30) pour les signaux de capteur de l'agencement de capteurs (23), dans lequel le dispositif de commande (8) et l'agencement de capteurs (23) sont aménagés afin de communiquer sans fil l'un avec l'autre, et dans lequel un capteur d'accélération (31) et au moins une électrode d'un capteur de conductivité (24, 25) et/ou un capteur d'humidité de l'air (26) est disposé(e) dans au moins un élément d'entraînement du linge (5, 22), et le dispositif de commande (8) est aménagé afin de déterminer, en présence d'une rotation du tambour (3), une position de l'élément d'entraînement du linge (5, 22), de sorte que les signaux de capteur mesurés par le capteur de conductivité (24, 25) et/ou le capteur d'humidité de l'air (26) peuvent être affectés à la position de l'élément d'entraînement du linge (5, 22), et dans lequel au moins deux capteurs (24, 25, 26, 27) de l'agencement de capteurs (23) se fondent sur le même principe de mesure et sont disposés le long de l'élément d'entraînement du linge (5, 22), et dans lequel le principe de mesure est sélectionné parmi les propriétés physiques que sont la température, l'humidité de l'air, la pression et/ou la conductivité, de sorte qu'au moins deux capteurs sont respectivement un capteur de température, un capteur d'humidité de l'air, un capteur de pression, un capteur de conductivité ou une quelconque combinaison de ces derniers, dans lequel le procédé comprend les étapes suivantes :a) mise en rotation du tambour (3) ;b) détection de signaux de capteur du capteur d'accélération (31) et de l'au moins une électrode du capteur de conductivité (24, 25) et/ou du capteur d'humidité de l'air (26) ; etd) évaluation des signaux de capteur des capteurs (24, 25, 26, 27, 31) de l'agencement de capteurs (23) utilisés à l'étape (b) par l'unité d'évaluation (30) quant au chargement du tambour (3) en linge et/ou au degré de séchage du linge, dans lequel les signaux de capteurs mesurés par le capteur de conductivité (24, 25) et/ou le capteur d'humidité de l'air (26) sont affectés à la position de l'élément d'entraînement du linge (5, 22), et transmission au dispositif de commande (8) des résultats d'évaluation obtenus.
- Procédé selon la revendication 12, caractérisé en ce qu'un ventilateur (8) est disposé dans un conduit d'air de processus (2) du sèche-linge (1) et effectue l'étape suivante (c) avant l'étape (d) :
(c) mesure de la puissance de l'écoulement d'air arrivant dans le tambour (3) et prise en compte de la puissance de l'écoulement d'air mesurée lors de l'évaluation dans l'étape subséquente (d).
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DE102018219361.4A DE102018219361A1 (de) | 2018-11-13 | 2018-11-13 | Wäschetrockner mit Beschleunigungssensor und Verfahren zu seinem Betrieb |
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DE102021108006A1 (de) * | 2021-03-30 | 2022-10-06 | Diehl Ako Stiftung & Co. Kg | Bewegungsüberwachungsanordnung zum Überwachen einer Bewegung einer Wäschetrommel eines Wäschebehandlungsgeräts |
CN114576949A (zh) * | 2022-03-03 | 2022-06-03 | 艾兰洁智能科技(浙江)有限公司 | 一种节能高效烘干机 |
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CN111188177B (zh) | 2023-08-25 |
EP3653782A1 (fr) | 2020-05-20 |
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