EP2281935B1 - Laundry appliance with an electric motor - Google Patents
Laundry appliance with an electric motor Download PDFInfo
- Publication number
- EP2281935B1 EP2281935B1 EP10171172.9A EP10171172A EP2281935B1 EP 2281935 B1 EP2281935 B1 EP 2281935B1 EP 10171172 A EP10171172 A EP 10171172A EP 2281935 B1 EP2281935 B1 EP 2281935B1
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- EP
- European Patent Office
- Prior art keywords
- electric motor
- measuring device
- drum
- controlling
- current
- 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.)
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- 238000001035 drying Methods 0.000 claims description 45
- 238000011068 loading method Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 description 23
- 230000002123 temporal effect Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000010981 drying operation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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
- 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
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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
- 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
-
- 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
- D06F2103/28—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
- D06F2103/28—Air properties
- D06F2103/36—Flow or velocity
-
- 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
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
- D06F2103/46—Current or voltage of the motor driving the drum
-
- 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
- D06F2103/54—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to blowers or fans
-
- 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
- D06F2105/16—Air properties
- D06F2105/24—Flow or velocity
-
- 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
- D06F2105/28—Electric heating
-
- 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
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
-
- 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
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
- D06F2105/48—Drum speed
-
- 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
- D06F34/08—Control circuits or arrangements thereof
Definitions
- the invention relates to a laundry treatment device for drying and / or washing laundry with an electric motor. Specifically, the invention relates to the field of tumble dryers and laundry dryers.
- a motor diagnostics and electronic control of a tumble dryer From the EP 0 436 375 B1 are known a motor diagnostics and electronic control of a tumble dryer.
- a load sensing device is provided which serves to detect non-cyclic changes in the rotational movement of a rotating member.
- the load sensor comprises a speed sensor for outputting a speed representation of an average speed of the rotating element, wherein a first comparing means for comparing successive speed representations and generating a sign representation of the arithmetic difference between two successive speed representations is provided.
- second comparison means for comparing successive sign representations and detecting a preselected change in rotational motion of the rotating member by periodically checking the sign of a first preselected number of successive sign representations and determining that a second predetermined number from the first predetermined number of consecutive sign representations has the same preselected sign provided.
- Operating functions of the tumble dryer can thereby be controlled with respect to phase angles of the motor and with respect to one or more temperature sensors.
- the from the EP 0 436 375 B1 known engine diagnosis and electronic control for a tumble dryer has the disadvantage that the cost of detecting operating parameters of the tumble dryer, to evaluate these operating parameters and to control the operating functions is relatively high. Specifically, additional sensors are required, particularly a speed sensor and one or more temperature sensors.
- a control method for a drum-type laundry dryer is known.
- a loading amount can be detected via the motor current.
- the rotational speed of the drum can be changed depending on the load, the type of laundry and the laundry.
- the JP H 04193298 A shows a clothes dryer with a loading sensor.
- the load sensor determines the load at the beginning of the drying program over the decay time of the capacitor voltage when the drive motor is coasting. With the help of the load, the temperature profile is used to deduce the textile properties and the degree of dehumidification.
- EP 2 260 138 B1 discloses a clothes dryer, in which the phase currents or voltages are measured and used to draw conclusions about the loading amount of the drum.
- the decreasing load during the drying process indicates the degree of dehydration and is used to stop when the desired degree of dryness is reached.
- the object of the invention is to provide a laundry treatment appliance having an improved structure. Specifically, it is an object of the invention to provide a laundry treatment device in which a load detection and optionally derived functions are realized in a cost effective manner.
- control and measuring device detects an electric current through the electric motor as an electrical parameter of the electric motor and / or that the control and measuring device detects an induced electric voltage of the electric motor as an electrical parameter of the electric motor and that the control and Measuring device depending on the detected current and / or the induced voltage determines the loading of the drum and / or the air power.
- Electricity through the electric motor is at least approximately proportional to the torque of the electric motor.
- the air output of the process air blower depends on the flow resistance of the air flow guided through the drum.
- the flow resistance also influences the torque of the process air blower.
- the control and measuring device by detecting the electric current of the electric motor of the process air blower, a determination of the air flow.
- the reliability and serviceability of the laundry treatment device can be further improved. It is also possible that further electrical parameters are evaluated, for example, a phase angle and the electric power of the electric motor for determining the loading of the drum and / or the air power can be used.
- control and measuring device detects an amplitude of the current through the electric motor and / or a current envelope of the current through the electric motor and that the control and measuring device also in dependence of the amplitude of the current and / or the current envelope of Current determines the loading of the drum and / or the air flow.
- the control and measuring device also in dependence of the amplitude of the current and / or the current envelope of Current determines the loading of the drum and / or the air flow.
- a more accurate determination of the loading of the drum is possible.
- Below the load is the mass of the laundry introduced into the drum, including the water bound in the laundry.
- a division into individual load classes, preferably in classes corresponding to the mass of the corresponding amount of dry laundry, possible, including especially used for differentiation between different partial loadings, the amplitude of the current and / or the current envelope, that is evaluated by the control and measuring device can be.
- control and measuring device can thus be distinguished, for example, between a half load, a three-quarter load, a full load and an overcharge of the drum.
- control and measuring device can thus be distinguished, for example, between a half load, a three-quarter load, a full load and an overcharge of the drum.
- the control and measuring device determines a remaining drying time as a function of the electrical parameters detected by the control and measuring device.
- the remaining drying time which is a measure of the drying state of the loading of the drum, can thereby be displayed to a user.
- the state of drying thus indicates how much water or moisture is still bound or stored in the load.
- the air performance correlates with the residual moisture of the laundry.
- a remaining drying time it is also possible from the air power or directly from the detected electrical parameters, a remaining drying time to reach a predetermined drying target, for example, to determine a predetermined target value of the residual moisture of the laundry to be achieved.
- an optimization or control of various functions of the laundry treatment appliance can take place. For example, a heating power or a drum speed can be increased or reduced.
- the control and measuring device determines the remaining drying time as a function of a momentary current through the electric motor and / or a momentary induced voltage of the electric motor. Furthermore, it is advantageous in this case that the control and measuring device, the load indicating the drying state, and / or remaining drying time and / or the air flow of the process air blower in response to a momentary temporal gradient of the current through the electric motor and / or a current temporal gradient the induced voltage of the electric motor determined. As a result, the accuracy of the determination of the drying state and / or the remaining drying time can be improved, and a control of the functions of the laundry treating appliance can be further improved.
- the remaining drying time can also be determined by the control and measuring device as a function of the particular load, in particular the charge determined at the beginning of the drying, the drum and / or the air flow, in particular the air flow which changes over the drying process.
- operating functions of the laundry treatment appliance can be influenced by the control and measuring device in an advantageous manner. Specifically, it is advantageous that a drum speed varies and / or a heating power can be varied. In addition, an overload of the dryer can be determined. Thus, a user can be displayed whether further loading of the drum is possible or a reduction of the load is required. Thus, a user can optimally utilize the performance of the laundry treating appliance.
- Fig. 1 shows functional groups of a laundry treatment appliance 1 in a schematic representation.
- the laundry treatment appliance 1 is used for drying and / or washing laundry.
- the laundry treatment appliance 1 may be configured as a dryer or a laundry dryer.
- the laundry treatment device 1 is suitable in a corresponding embodiment, however, also for other applications.
- the laundry treatment appliance 1 has a drum 2, which is connected via a shaft 3 with an electric motor 4.
- the electric motor 4 is used to drive the drum 2, wherein it rotates in operation, for example in a direction of rotation 5.
- the electric motor 4 can in particular be designed as a permanent-magnet synchronous motor (PESM).
- PESM permanent-magnet synchronous motor
- the laundry treatment appliance 1 has a control and measuring device 6, wherein the electric motor 4 is connected via electrical lines 7, 8 with the control and measuring device 6.
- the control and measuring device 6 has a Voltmeter 9, which measures the voltage between the electrical lines 7, 8.
- the voltmeter 9 can in particular measure a voltage U induced by the electric motor 4.
- an ammeter 10 is arranged, which measures the electric current I flowing through the electric motor 4.
- the control and measuring device 6, a power source 11 for providing the electrical energy for the electric motor 4.
- the control and measuring device 6 can detect electrical parameters of the electric motor 4.
- the electric current I detected by the ammeter 10 is at least approximately proportional to the torque of the electric motor 4.
- a phase angle, an electric power or the like may be detected via the voltmeter 9 and the ammeter 10.
- the loading B can be determined.
- control and measuring device 6 has an electronic processing device which serves to process the electrical parameters of the electric motor 4.
- the processing device 12 may be formed, for example, by an electronic processing unit in the form of a microprocessor.
- the processing device 12 determines the loading B in response to an electric current I (t 0 ) by the electric motor 4 at the time of starting the drying operation and in response to the induced voltage U (t 0 ) of the electric motor 4 at the start of the drying operation ,
- the start of the drying process is indicated by the time t 0 .
- the functional relationship is determined by a predetermined function f 1 .
- the function f 1 can be evaluated by calculation or stored in the form of a table.
- the loading B of the drum 2 can also take into account further electrical parameters of the electric motor 4, which can optionally also be determined from the course of the current I or the course of the voltage U.
- the control and measuring device 6 can also detect an amplitude of the current I and / or a current envelope of the current I.
- the processing device 12 can then determine the loading B as a function of this amplitude of the current I and / or the current envelope of the current I.
- the function f 1 must then be modified accordingly.
- the processing device 12 is configured to determine the remaining drying time .DELTA.t in dependence on the detected electrical parameters.
- the processing means 12 determines the remaining drying time .DELTA.t depending on the load B of the drum 2, which can be determined according to the formula (1), the instantaneous electric current I, which is determined by the ammeter 10 at any time induced voltage U of the electric motor 4, which is determined at any time by the voltmeter 9, the instantaneous temporal gradient of the electric current I and the instantaneous temporal gradient of the induced voltage U.
- the loading B may be based on the starting time t 0 , as determined, for example, according to the formula (1), so that the loading B is constant.
- the current I, the voltage U and the time derivatives of both the current I and the voltage U can be related to the current time and vary in time accordingly.
- the remaining drying time ⁇ t can be continuously updated.
- certain remaining drying time .DELTA.t also a control of the drying process of the provided in the drum 2 laundry done.
- the heating power of the electric heater 13 and / or the number of revolutions of the drum 2 can be controlled by appropriate control of the electric motor 4 by the control and measuring device 6.
- the functional relationship given by the formula (2) can be computationally evaluated by a table or the like. In this case, only a part of the quantities indicated in the formula (2), which are included in the function f 2 , can be taken into account. It is also possible that further electrical parameters of the electric motor 4 or variables derived therefrom are taken into account. For example, an instantaneous load can be determined from the instantaneous electric current I and the instantaneous induced voltage U according to formula (1). The instantaneous load decreases in a drying operation from the load B determined by the formula (1) because the laundry provided in the drum 2 gradually dries, losing moisture (water).
- control and measuring device 6 may have a memory 14 in which, for example, the motor current I of the electric motor 4 is deposited as a function of the loading B.
- the control and measuring device 6 can also detect an overload of the drum 2.
- a limit value for the loading B can be specified.
- the loading B may be limited to a maximum value.
- the Fig. 2 shows an alternative embodiment of a laundry treatment appliance 1 '.
- Facilities in the Fig. 1 Corresponding laundry treatment appliance to be shown are designated by the same indices.
- a process air guide 18 is connected to the drum 2.
- a heat exchanger 19 and a Heating device 13 is arranged.
- the laundry treatment appliance 1 comprises a second motor 15, which drives a process air blower 16 and a cooling air blower 17.
- the fans 16 and 17 may be driven by their own motors or by the drum drive motor 4. In the latter case, no second motor would be required.
- Fig. 2 shown laundry treatment device is designed as a so-called condensation tumble dryer.
- the invention can also be applied to exhaust air dryers. Such an exhaust air dryer would then have an open process air duct and the heat exchanger could be omitted in addition.
- the processing device 12 determines the air flow L in response to an electric current I (t 0 ) by the electric motor 15 at the time of starting the dry process and in response to the induced voltage U (t 0 ) of the electric motor 15 at the start of the drying process.
- the start of the drying process is indicated by the time t 0 .
- the functional relationship is determined by a predetermined function f 3 .
- the function f 3 can be evaluated by calculation or stored in the form of a table.
- the air output L can also take into account further electrical parameters of the electric motor 15, which can optionally also be determined from the course of the current I or the course of the voltage U.
- the control and measuring device 6 'can also detect an amplitude of the current I and / or a current envelope of the current I.
- the processing device 12 'can determine the air flow L as a function of this amplitude of the current I and / or the current envelope of the current I.
- the function f 3 must then be modified accordingly.
- the processing device 12 determines the remaining drying time .DELTA.t in dependence on the detected electrical parameters determine.
- the processing means 12 determines the remaining drying time ⁇ t as a function of the air power L, which can be determined according to the formula (3), the instantaneous electric current I, which is determined by the ammeter 10 at any one time, of the induced voltage U of the electric motor 15, which is determined at any time by the voltmeter 9, the instantaneous temporal gradient of the electric current I and the instantaneous temporal gradient of the induced voltage U.
- the air capacity L may be related to the initial time t 0 , as determined, for example, according to the formula (3), so that the air capacity L is constant.
- the current I, the voltage U and the time derivatives of both the current I and the voltage U can be related to the current time and vary in time accordingly.
- the remaining drying time ⁇ t can be continuously updated.
- certain remaining drying time .DELTA.t can also be controlled by the drying process of the laundry provided in the drum 2.
- the cardiac output of the electric heater 13 and / or the number of revolutions of the drum 2 can be controlled by appropriate control of the electric motor 4 by the control and measuring device 6 '.
- the functional relationship given by the formula (4) can be computationally evaluated by a table or the like. In this case, only a part of the variables indicated in the formula (4), which are included in the function f 4 , can be taken into account. It is also possible that further electrical parameters of the electric motor 15 or variables derived therefrom are taken into account. For example, an instantaneous load can be determined from the instantaneous electric current I and the instantaneous induced voltage U according to formula (1). The instantaneous air flow decreases in a drying process starting from the Air flow L, which is determined by the formula (3), since the laundry provided in the drum 2 dries little by little, thereby increasing the flow resistance.
- control and measuring device 6 For the evaluation of the electrical parameters of the electric motor 15 and the variables derived therefrom, a comparison with stored values, stored curves or the like can also be used.
- the control and measuring device 6 ' have a memory 14 in which, for example, the motor current I of the electric motor 15 is deposited in dependence on the air flow L.
- the control and measuring device 6 or 6 ' preferably optimizes the remaining drying time ⁇ t.
- control and measuring device 6 and 6 'be executed in a device.
- remaining drying time ⁇ t can be determined by a combination of the functional relationships given in equations (2) and (4).
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Description
Die Erfindung betrifft ein Wäschebehandlungsgerät zum Trocknen und/oder Waschen von Wäsche mit einem Elektromotor. Speziell betrifft die Erfindung das Gebiet der Wäschetrockner und Waschtrockner.The invention relates to a laundry treatment device for drying and / or washing laundry with an electric motor. Specifically, the invention relates to the field of tumble dryers and laundry dryers.
Aus der
Die aus der
Aus der
Die
In der
Aufgabe der Erfindung ist es, ein Wäschebehandlungsgerät zu schaffen, das einen verbesserten Aufbau aufweist. Speziell ist es eine Aufgabe der Erfindung, ein Wäschebehandlungsgerät anzugeben, bei dem eine Beladungserkennung und gegebenenfalls daraus abgeleitete Funktionen in kostengünstiger Weise realisiert sind.The object of the invention is to provide a laundry treatment appliance having an improved structure. Specifically, it is an object of the invention to provide a laundry treatment device in which a load detection and optionally derived functions are realized in a cost effective manner.
Die Aufgabe wird durch ein Wäschebehandlungsgerät mit den Merkmalen des Anspruchs 1 gelöst.The object is achieved by a laundry treatment appliance having the features of
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen des erfindungsgemäßen Wäschebehandlungsgeräts möglich.The measures listed in the dependent claims advantageous refinements of the laundry treatment device according to the invention are possible.
Vorteilhaft ist es, dass die Steuer- und Messeinrichtung einen elektrischen Strom durch den Elektromotor als elektrischen Parameter des Elektromotors erfasst und/oder dass die Steuer- und Messeinrichtung eine induzierte elektrische Spannung des Elektromotors als elektrischen Parameter des Elektromotors erfasst und dass die Steuer- und Messeinrichtung in Abhängigkeit von dem erfassten Strom und/oder der induzierten Spannung die Beladung der Trommel und/oder die Luftleistung bestimmt. Der elektrischeIt is advantageous that the control and measuring device detects an electric current through the electric motor as an electrical parameter of the electric motor and / or that the control and measuring device detects an induced electric voltage of the electric motor as an electrical parameter of the electric motor and that the control and Measuring device depending on the detected current and / or the induced voltage determines the loading of the drum and / or the air power. The electric
Strom durch den Elektromotor ist zumindest näherungsweise proportional zu dem Drehmoment des Elektromotors. Durch die Erfassung des elektrischen Stroms ist somit eine Bestimmung der Beladung der Trommel durch die Steuer- und Messeinrichtung möglich, ohne dass zusätzliche Sensoren erforderlich sind. Die Luftleistung des Prozessluftgebläses ist abhängig vom Strömungswiderstand des durch die Trommel geführten Luftstromes. Der Strömungswiderstand beeinflusst auch das Drehmoment des Prozessluftgebläses. Somit kann vorteilhafterweise auch durch die Erfassung des elektrischen Stromes des Elektromotors des Prozessluftgebläses eine Bestimmung der Luftleistung durch die Steuer- und Messvorrichtung ermöglicht werden. Speziell durch die Einsparung von mechanischen Sensoren, die wartungsanfällig sind, kann die Zuverlässigkeit und Wartungsfreundlichkeit des Wäschebehandlungsgeräts weiter verbessert werden. Möglich ist es ferner, dass weitere elektrische Parameter ausgewertet werden, beispielsweise können ein Phasenwinkel und die elektrische Leistung des Elektromotors zur Bestimmung der Beladung der Trommel und/oder der Luftleistung herangezogen werden.Electricity through the electric motor is at least approximately proportional to the torque of the electric motor. By detecting the electric current, a determination of the loading of the drum by the control and measuring device is thus possible without additional sensors are required. The air output of the process air blower depends on the flow resistance of the air flow guided through the drum. The flow resistance also influences the torque of the process air blower. Thus, it can be advantageously made possible by the control and measuring device by detecting the electric current of the electric motor of the process air blower, a determination of the air flow. Especially by the saving of mechanical sensors, which are maintenance-prone, the reliability and serviceability of the laundry treatment device can be further improved. It is also possible that further electrical parameters are evaluated, for example, a phase angle and the electric power of the electric motor for determining the loading of the drum and / or the air power can be used.
Vorteilhaft ist es hierbei ferner, dass die Steuer- und Messeinrichtung eine Amplitude des Stroms durch den Elektromotor und/oder eine Stromhüllkurve des Stroms durch den Elektromotor erfasst und dass die Steuer- und Messeinrichtung auch in Abhängigkeit der Amplitude des Stroms und/oder der Stromhüllkurve des Stroms die Beladung der Trommel und/oder die Luftleistung bestimmt. Hierdurch ist eine genauere Bestimmung der Beladung der Trommel möglich. Unter der Beladung wird die Masse der in die Trommel eingebrachten Wäsche inklusive des in der Wäsche gebundenen Wassers. Ferner wird auch eine Einteilung in einzelne Beladungsklassen, vorzugsweise in Klassen, die Masse der entsprechenden trockenen Wäschemenge entsprechen, möglich, wozu speziell zur Differenzierung zwischen unterschiedlichen Teilbeladungen die Amplitude des Stroms und/oder die Stromhüllkurve herangezogen, das heißt durch die Steuer- und Messeinrichtung ausgewertet, werden kann. Beispielsweise kann dadurch zwischen einer halben Beladung der Trommel und einer dreiviertelten Beladung der Trommel unterschieden werden. Je nach Ausgestaltung des Wäschebehandlungsgeräts, insbesondere der Steuer- und Messeinrichtung kann somit beispielsweise zwischen einer halben Beladung, einer dreiviertelten Beladung, einer Vollbeladung und einer Überbeladung der Trommel unterschieden werden. Allerdings können auch andere und feinere Unterscheidungen bezüglich der Beladung der Trommel durch die Steuer- und Messeinrichtung erfolgenIt is also advantageous here that the control and measuring device detects an amplitude of the current through the electric motor and / or a current envelope of the current through the electric motor and that the control and measuring device also in dependence of the amplitude of the current and / or the current envelope of Current determines the loading of the drum and / or the air flow. As a result, a more accurate determination of the loading of the drum is possible. Below the load is the mass of the laundry introduced into the drum, including the water bound in the laundry. Furthermore, a division into individual load classes, preferably in classes corresponding to the mass of the corresponding amount of dry laundry, possible, including especially used for differentiation between different partial loadings, the amplitude of the current and / or the current envelope, that is evaluated by the control and measuring device , can be. For example, it can be distinguished between a half load of the drum and a three-quarter loading of the drum. Depending on the configuration of the laundry treatment appliance, in particular the control and measuring device can thus be distinguished, for example, between a half load, a three-quarter load, a full load and an overcharge of the drum. However, other and finer distinctions are made with respect to the loading of the drum by the control and measuring device
In vorteilhafter Weise bestimmt die Steuer- und Messeinrichtung eine verbleibende Trocknungszeit in Abhängigkeit von dem von der Steuer- und Messeinrichtung erfassten elektrischen Parameter. Die verbleibende Trocknungszeit, die ein Maß für den Trocknungszustand der Beladung der Trommel ist, kann dadurch einem Benutzer angezeigt werden. Der Trocknungszustand gibt somit an, wie viel Wasser bzw. Feuchtigkeit in der Beladung noch gebunden bzw. eingelagert ist. Darüber hinaus konnte überraschender Weise festgestellt werden, dass die Luftleistung mit der Restfeuchte der Wäsche korreliert. Somit ist es ferner möglich aus der Luftleistung oder direkt aus dem erfassten elektrischen Parameter eine verbleibende Trocknungszeit bis zum Erreichen eines vorgegebenen Trocknungszieles, beispielsweise ein vorgegebener Soll-Wert der zu erreichenden Restfeuchte der Wäsche, zu bestimmen. Ferner kann im Hinblick auf die bestimmte verbleibende Trocknungszeit eine Optimierung beziehungsweise Steuerung verschiedener Funktionen des Wäschebehandlungsgeräts erfolgen. Beispielsweise kann eine Heizleistung oder eine Trommeldrehzahl erhöht oder reduziert werden.Advantageously, the control and measuring device determines a remaining drying time as a function of the electrical parameters detected by the control and measuring device. The remaining drying time, which is a measure of the drying state of the loading of the drum, can thereby be displayed to a user. The state of drying thus indicates how much water or moisture is still bound or stored in the load. In addition, it was surprisingly found that the air performance correlates with the residual moisture of the laundry. Thus, it is also possible from the air power or directly from the detected electrical parameters, a remaining drying time to reach a predetermined drying target, for example, to determine a predetermined target value of the residual moisture of the laundry to be achieved. Furthermore, with regard to the particular remaining drying time, an optimization or control of various functions of the laundry treatment appliance can take place. For example, a heating power or a drum speed can be increased or reduced.
Vorteilhaft ist es hierbei auch, dass die Steuer- und Messeinrichtung die verbleibende Trocknungszeit in Abhängigkeit eines momentanen Stroms durch den Elektromotor und/oder einer momentanen induzierten Spannung des Elektromotors bestimmt. Ferner ist es hierbei vorteilhaft, dass die Steuer- und Messeinrichtung die Beladung, welche den Trocknungszustand anzeigt, und/oder verbleibende Trocknungszeit und/oder die Luftleistung des Prozessluftgebläses in Abhängigkeit eines momentanen zeitlichen Gradienten des Stroms durch den Elektromotor und/oder eines momentanen zeitlichen Gradienten der induzierten Spannung des Elektromotors bestimmt. Hierdurch kann die Genauigkeit der Bestimmung des Trocknungszustands und/oder der verbleibenden Trocknungszeit verbessert und eine Steuerung der Funktionen des Wäschebehandlungsgeräts weiter verbessert werden. Die verbleibende Trocknungszeit kann hierbei auch in Abhängigkeit von der bestimmten Beladung, insbesondere der zu Beginn des Trocknens bestimmten Beladung, der Trommel und/oder der Luftleistung, insbesondere der sich über den Trocknungsprozess sich ändernde Luftleistung, durch die Steuer- und Messeinrichtung bestimmt werden.It is also advantageous here that the control and measuring device determines the remaining drying time as a function of a momentary current through the electric motor and / or a momentary induced voltage of the electric motor. Furthermore, it is advantageous in this case that the control and measuring device, the load indicating the drying state, and / or remaining drying time and / or the air flow of the process air blower in response to a momentary temporal gradient of the current through the electric motor and / or a current temporal gradient the induced voltage of the electric motor determined. As a result, the accuracy of the determination of the drying state and / or the remaining drying time can be improved, and a control of the functions of the laundry treating appliance can be further improved. The remaining drying time can also be determined by the control and measuring device as a function of the particular load, in particular the charge determined at the beginning of the drying, the drum and / or the air flow, in particular the air flow which changes over the drying process.
Somit können in vorteilhafter Weise Betriebsfunktionen des Wäschebehandlungsgeräts durch die Steuer- und Messeinrichtung beeinflusst werden. Speziell ist es von Vorteil, dass eine Trommeldrehzahl variiert und/oder eine Heizleistung variiert werden. Außerdem kann eine Überladung des Trockners bestimmt werden. Somit kann einem Benutzer angezeigt werden, ob eine weitere Beladung der Trommel möglich oder eine Verringerung der Beladung erforderlich ist. Somit kann ein Benutzer die Leistungsfähigkeit des Wäschebehandlungsgeräts optimal ausnutzen.Thus, operating functions of the laundry treatment appliance can be influenced by the control and measuring device in an advantageous manner. Specifically, it is advantageous that a drum speed varies and / or a heating power can be varied. In addition, an overload of the dryer can be determined. Thus, a user can be displayed whether further loading of the drum is possible or a reduction of the load is required. Thus, a user can optimally utilize the performance of the laundry treating appliance.
Das vorstehend genannte Wäschebehandlungsgerät und dessen vorteilhafte Weiterbildungen definieren auch entsprechende vorteilhafte Verfahrenschritte zur Steuerung des Wäschepflegegeräts.The aforementioned laundry treatment appliance and its advantageous developments also define corresponding advantageous process steps for controlling the laundry care appliance.
Bevorzugte Ausführungsbeispiele der Erfindung sind in der nachfolgenden Beschreibung anhand der beigefügten Zeichnung näher erläutert. Es zeigt:
- Fig. 1
- ein Wäschebehandlungsgerät in einer schematischen Darstellung und
- Fig. 2
- ein weiteres Wäschebehandlungsgerät in einer schematischen Darstellung.
- Fig. 1
- a laundry treatment appliance in a schematic representation and
- Fig. 2
- another laundry treatment device in a schematic representation.
Das Wäschebehandlungsgerät 1 weist eine Trommel 2 auf, die über eine Welle 3 mit einem Elektromotor 4 verbunden ist. Der Elektromotor 4 dient zum Antreiben der Trommel 2, wobei diese im Betrieb beispielsweise in einer Drehrichtung 5 rotiert. Der Elektromotor 4 kann insbesondere als permanenterregter Synchronmotor (PESM) ausgestaltet sein. Ferner ist in der
Außerdem weist das Wäschebehandlungsgerät 1 eine Steuer- und Messeinrichtung 6 auf, wobei der Elektromotor 4 über elektrische Leitungen 7, 8 mit der Steuer- und Messeinrichtung 6 verbunden ist. Die Steuer- und Messeinrichtung 6 weist einen Spannungsmesser 9 auf, der die Spannung zwischen den elektrischen Leitungen 7, 8 misst. Hierbei kann der Spannungsmesser 9 insbesondere eine von dem Elektromotor 4 induzierte Spannung U messen. Außerdem ist in der elektrischen Leitung 7 ein Strommesser 10 angeordnet, der den elektrischen Strom I, der durch den Elektromotor 4 fließt, misst. Außerdem weist die Steuer- und Messeinrichtung 6 eine Energiequelle 11 zum Bereitstellen der elektrischen Energie für den Elektromotor 4 auf.In addition, the
Über den Spannungsmesser 9 und den Strommesser 10 kann die Steuer- und Messeinrichtung 6 elektrische Parameter des Elektromotors 4 erfassen. Beispielsweise ist der von dem Strommesser 10 erfasste elektrische Strom I zumindest näherungsweise proportional zu dem Drehmoment des Elektromotors 4. Außerdem kann auch ein Phasenwinkel, eine elektrische Leistung oder dergleichen über den Spannungsmesser 9 und den Strommesser 10 erfasst werden.Via the
Beispielsweise kann aus dem elektrischen Strom I, der ein Maß für das Drehmoment des Elektromotors 4 ist, die Beladung B bestimmt werden.For example, from the electric current I, which is a measure of the torque of the electric motor 4, the loading B can be determined.
In diesem Ausführungsbeispiel weist die Steuer- und Messeinrichtung 6 eine elektronische Verarbeitungseinrichtung auf, die zum Verarbeiten der elektrischen Parameter des Elektromotors 4 dient. Die Verarbeitungseinrichtung 12 kann beispielsweise durch eine elektronische Recheneinheit in Form eines Mikroprozessors gebildet sein.In this exemplary embodiment, the control and measuring
In diesem Ausführungsbeispiel bestimmt die Verarbeitungseinrichtung 12 die Beladung B in Abhängigkeit von einem elektrischen Strom I(t0) durch den Elektromotor 4 zum Zeitpunkt eines Starts des Trockenvorgangs und in Abhängigkeit von der induzierten Spannung U(t0) des Elektromotors 4 beim Start des Trockenvorgangs. Der Start des Trockenvorgangs ist dabei durch den Zeitpunkt t0 angegeben. Der funktionale Zusammenhang ist somit durch die folgende Formel gegeben:
Der funktionale Zusammenhang wird dabei durch eine vorbestimmte Funktion f1 bestimmt. Die Funktion f1 kann rechnerisch ausgewertet werden oder in Form einer Tabelle hinterlegt sein.The functional relationship is determined by a predetermined function f 1 . The function f 1 can be evaluated by calculation or stored in the form of a table.
Die Beladung B der Trommel 2 kann allerdings auch weitere elektrische Parameter des Elektromotors 4 berücksichtigen, die sich gegebenenfalls auch aus dem Verlauf des Stroms I oder dem Verlauf der Spannung U ermitteln lassen. Beispielsweise kann die Steuer- und Messeinrichtung 6 auch eine Amplitude des Stroms I und/oder eine Stromhüllkurve des Stroms I erfassen. Die Verarbeitungseinrichtung 12 kann dann die Beladung B auch in Abhängigkeit dieser Amplitude des Stroms I und/oder der Stromhüllkurve des Stroms I bestimmen. Die Funktion f1 ist dann entsprechend zu modifizieren.However, the loading B of the
Außerdem ist die Verarbeitungseinrichtung 12 ausgestaltet, die verbleibende Trocknungszeit Δt in Abhängigkeit von den erfassten elektrischen Parametern zu bestimmen. In diesem Ausführungsbeispiel bestimmt die Verarbeitungseinrichtung 12 die verbleibende Trocknungszeit Δt in Abhängigkeit von der Beladung B der Trommel 2, die entsprechend der Formel (1) ermittelt werden kann, dem momentanen elektrischen Strom I, der zu jedem Zeitpunkt durch den Strommesser 10 bestimmt wird, der induzierten Spannung U des Elektromotors 4, der zu jedem Zeitpunkt durch den Spannungsmesser 9 bestimmt wird, dem momentanen zeitlichen Gradienten des elektrischen Stroms I und dem momentanen zeitlichen Gradienten der induzierten Spannung U. Dieser funktionale Zusammenhang kann durch eine Funktion f2 angegeben werden. Daher gilt:
Hierbei kann die Beladung B auf den Anfangszeitpunkt t0 bezogen sein, wie es beispielsweise entsprechend der Formel (1) bestimmt ist, so dass die Beladung B konstant ist. Der Strom I, die Spannung U und die zeitlichen Ableitungen sowohl des Stroms I als auch der Spannung U können allerdings auf den momentanen Zeitpunkt bezogen sein und entsprechend zeitlich variieren. Dadurch kann die verbleibende Trocknungszeit Δt fortlaufend aktualisiert werden. Ferner kann in Bezug auf die Beladung B und die entsprechend der Formel (2) bestimmte verbleibende Trocknungszeit Δt auch eine Steuerung des Trocknungsprozesses der in der Trommel 2 vorgesehenen Wäsche erfolgen. Beispielsweise kann die Heizleistung der elektrischen Heizeinrichtung 13 und/oder die Umdrehungszahl der Trommel 2 durch entsprechendes Ansteuern des Elektromotors 4 durch die Steuer- und Messeinrichtung 6 gesteuert werden.In this case, the loading B may be based on the starting time t 0 , as determined, for example, according to the formula (1), so that the loading B is constant. The current I, the voltage U and the time derivatives of both the current I and the voltage U, however, can be related to the current time and vary in time accordingly. As a result, the remaining drying time Δt can be continuously updated. Further, with respect to the load B and the according to the formula (2) certain remaining drying time .DELTA.t also a control of the drying process of the provided in the
Der durch die Formel (2) gegebene funktionale Zusammenhang kann auf rechnerische Weise, durch eine Tabelle oder dergleichen ausgewertet werden. Dabei kann auch nur ein Teil der in der Formel (2) angegebenen Größen, die in die Funktion f2 eingehen, berücksichtigt werden. Möglich ist es auch, dass weitere elektrische Parameter des Elektromotors 4 oder daraus abgeleitete Größen berücksichtigt werden. Beispielsweise kann eine momentane Beladung aus dem momentanen elektrischen Strom I und der momentanen induzierten Spannung U entsprechend der Formel (1) bestimmt werden. Die momentane Beladung verringert sich bei einem Trocknungsvorgang ausgehend von der Beladung B, die durch die Formel (1) bestimmt ist, da die in der Trommel 2 vorgesehene Wäsche nach und nach trocknet und dabei Feuchtigkeit (Wasser) verliert.The functional relationship given by the formula (2) can be computationally evaluated by a table or the like. In this case, only a part of the quantities indicated in the formula (2), which are included in the function f 2 , can be taken into account. It is also possible that further electrical parameters of the electric motor 4 or variables derived therefrom are taken into account. For example, an instantaneous load can be determined from the instantaneous electric current I and the instantaneous induced voltage U according to formula (1). The instantaneous load decreases in a drying operation from the load B determined by the formula (1) because the laundry provided in the
Zur Auswertung der elektrischen Parameter des Elektromotors 4 und der daraus abgeleiteten Größen kann auch ein Vergleich mit hinterlegten Werten, hinterlegten Kurven oder dergleichen dienen. Hierfür kann die Steuer- und Messeinrichtung 6 einen Speicher 14 aufweisen, in dem beispielsweise der Motorstrom I des Elektromotors 4 in Abhängigkeit der Beladung B hinterlegt ist.For the evaluation of the electrical parameters of the electric motor 4 and the variables derived therefrom, a comparison with stored values, stored curves or the like can also be used. For this purpose, the control and measuring
Die Steuer- und Messeinrichtung 6 kann außerdem eine Überladung der Trommel 2 erkennen. Hierbei kann ein Grenzwert für die Beladung B angegeben sein. Beispielsweise kann die Beladung B auf einen Maximalwert begrenzt sein. Hierdurch wird ein zuverlässiger Betrieb des Wäschebehandlungsgeräts 1 und eine vorteilhafte Wirkungsweise erzielt.The control and measuring
Die
In der zweiten Ausführungsform ist eine Prozessluftführung 18, die mit der Trommel 2 verbunden ist. In der Prozessluftführung 18 ist ein Wärmetauscher 19 und eine Heizeinrichtung 13 angeordnet. Ferner umfasst das Wäschebehandlungsgerät 1' einen zweiten Motor 15, der ein Prozessluftgebläse 16 und ein Kühlluftgebläse 17 antreibt. In alternativen Ausführungen können die Gebläse 16 und 17 durch jeweils eigene Motoren angetrieben werden oder durch den Trommelantriebsmotor 4. In letzteren Fall würde kein zweiter Motor erforderlich sein.In the second embodiment, a
Das in
In diesem zweiten Ausführungsbeispiel bestimmt die Verarbeitungseinrichtung 12' die Luftleistung L in Abhängigkeit von einem elektrischen Strom I(t0) durch den Elektromotor 15 zum Zeitpunkt eines Starts des Trockenvorgangs und in Abhängigkeit von der induzierten Spannung U(t0) des Elektromotors 15 beim Start des Trockenvorgangs. Der Start des Trockenvorgangs ist dabei durch den Zeitpunkt t0 angegeben. Der funktionale Zusammenhang ist somit durch die folgende Formel gegeben:
Der funktionale Zusammenhang wird dabei durch eine vorbestimmte Funktion f3 bestimmt. Die Funktion f3 kann rechnerisch ausgewertet werden oder in Form einer Tabelle hinterlegt sein.The functional relationship is determined by a predetermined function f 3 . The function f 3 can be evaluated by calculation or stored in the form of a table.
Die Luftleistung L kann allerdings auch weitere elektrische Parameter des Elektromotors 15 berücksichtigen, die sich gegebenenfalls auch aus dem Verlauf des Stroms I oder dem Verlauf der Spannung U ermitteln lassen. Beispielsweise kann die Steuer- und Messeinrichtung 6' auch eine Amplitude des Stroms I und/oder eine Stromhüllkurve des Stroms I erfassen. Die Verarbeitungseinrichtung 12' kann dann die Luftleistung L auch in Abhängigkeit dieser Amplitude des Stroms I und/oder der Stromhüllkurve des Stroms I bestimmen. Die Funktion f3 ist dann entsprechend zu modifizieren.However, the air output L can also take into account further electrical parameters of the
Außerdem ist die Verarbeitungseinrichtung 12' ausgestaltet, die verbleibende Trocknungszeit Δt in Abhängigkeit von den erfassten elektrischen Parametern zu bestimmen. In diesem Ausführungsbeispiel bestimmt die Verarbeitungseinrichtung 12' die verbleibende Trocknungszeit Δt in Abhängigkeit von der Luftleistung L, die entsprechend der Formel (3) ermittelt werden kann, dem momentanen elektrischen Strom I, der zu jedem Zeitpunkt durch den Strommesser 10 bestimmt wird, der induzierten Spannung U des Elektromotors 15, der zu jedem Zeitpunkt durch den Spannungsmesser 9 bestimmt wird, dem momentanen zeitlichen Gradienten des elektrischen Stroms I und dem momentanen zeitlichen Gradienten der induzierten Spannung U. Dieser funktionale Zusammenhang kann durch eine Funktion f4 angegeben werden. Daher gilt:
Hierbei kann die Luftleistung L auf den Anfangszeitpunkt t0 bezogen sein, wie es beispielsweise entsprechend der Formel (3) bestimmt ist, so dass die Luftleistung L konstant ist. Der Strom I, die Spannung U und die zeitlichen Ableitungen sowohl des Stroms I als auch der Spannung U können allerdings auf den momentanen Zeitpunkt bezogen sein und entsprechend zeitlich variieren. Dadurch kann die verbleibende Trocknungszeit Δt fortlaufend aktualisiert werden. Ferner kann in Bezug auf die Luftleistung L und die entsprechend der Formel (4) bestimmte verbleibende Trocknungszeit Δt auch eine Steuerung des Trocknungsprozesses der in der Trommel 2 vorgesehenen Wäsche erfolgen. Beispielsweise kann die Herzleistung der elektrischen Heizeinrichtung 13 und/oder die Umdrehungszahl der Trommel 2 durch entsprechendes Ansteuern des Elektromotors 4 durch die Steuer- und Messeinrichtung 6' gesteuert werden.Here, the air capacity L may be related to the initial time t 0 , as determined, for example, according to the formula (3), so that the air capacity L is constant. The current I, the voltage U and the time derivatives of both the current I and the voltage U, however, can be related to the current time and vary in time accordingly. As a result, the remaining drying time Δt can be continuously updated. Further, with respect to the air flow L and according to the formula (4), certain remaining drying time .DELTA.t can also be controlled by the drying process of the laundry provided in the
Der durch die Formel (4) gegebene funktionale Zusammenhang kann auf rechnerische Weise, durch eine Tabelle oder dergleichen ausgewertet werden. Dabei kann auch nur ein Teil der in der Formel (4) angegebenen Größen, die in die Funktion f4 eingehen, berücksichtigt werden. Möglich ist es auch, dass weitere elektrische Parameter des Elektromotors 15 oder daraus abgeleitete Größen berücksichtigt werden. Beispielsweise kann eine momentane Beladung aus dem momentanen elektrischen Strom I und der momentanen induzierten Spannung U entsprechend der Formel (1) bestimmt werden. Die momentane Luftleistung verringert sich bei einem Trocknungsvorgang ausgehend von der Luftleistung L, die durch die Formel (3) bestimmt ist, da die in der Trommel 2 vorgesehene Wäsche nach und nach trocknet und dabei den Strömungswiderstand erhöht.The functional relationship given by the formula (4) can be computationally evaluated by a table or the like. In this case, only a part of the variables indicated in the formula (4), which are included in the function f 4 , can be taken into account. It is also possible that further electrical parameters of the
Zur Auswertung der elektrischen Parameter des Elektromotors 15 und der daraus abgeleiteten Größen kann auch ein Vergleich mit hinterlegten Werten, hinterlegten Kurven oder dergleichen dienen. Hierfür kann die Steuer- und Messeinrichtung 6' einen Speicher 14 aufweisen, in dem beispielsweise der Motorstrom I des Elektromotors 15 in Abhängigkeit der Luftleistung L hinterlegt ist.For the evaluation of the electrical parameters of the
Vorzugsweise optimiert die Steuer- und Messeinrichtung 6 bzw. 6' die verbleibende Trocknungszeit Δt.The control and measuring
Die Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt. So kann die Steuer- und Messeinrichtung 6 und 6' in einer Einrichtung ausgeführt sein. Ferner kann die verbleibende Trocknungszeit Δt durch eine Kombination der in den Gleichungen (2) und (4) angegebenen funktionalen Zusammenhängen bestimmt werden.The invention is not limited to the described embodiments. Thus, the control and measuring
- 11
- WäschebehandlungsgerätLaundry treatment device
- 22
- Trommeldrum
- 33
- Wellewave
- 44
- Elektromotorelectric motor
- 55
- Drehrichtungdirection of rotation
- 6, 6'6, 6 '
- Steuer- und MesseinrichtungControl and measuring equipment
- 7, 87, 8
- elektrische Leitungenelectric lines
- 99
- Spannungsmesservoltmeter
- 1010
- Strommesserammeter
- 1111
- Energiequelleenergy
- 12, 12'12, 12 '
- Verarbeitungseinrichtungprocessing device
- 1313
- Heizeinrichtungheater
- 1414
- SpeicherStorage
- 1515
- Elektromotorelectric motor
- 1616
- ProzessluftgebläseProcess air fan
- 1717
- KühlluftgebläseCooling fan
- 1818
- ProzessluftführungProcess air supply
- 1919
- Wärmetauscherheat exchangers
- 2020
- KühlluftführungCooling air flow
- UU
- induzierte Spannunginduced voltage
- II
- elektrischer Stromelectrical current
- BB
- Beladungloading
- LL
- Luftleistungair output
Claims (10)
- Laundry treatment appliance (1) for drying or for washing and drying laundry, with a rotatably mounted drum (2), at least one electric motor (4, 15), which serves for driving the drum (2) and/or for driving a process air fan (16), which is arranged in a process air guide (18) and is connected with the drum (2) and by which air for drying the laundry can be conducted to and from the drum (2), and at least one controlling and measuring device (6, 6') for the electric motor (4, 15), wherein the controlling and measuring device (6) detects at least one electrical parameter of the electric motor (4, 15), characterised in that- the controlling and measuring device (6, 6') determines in dependence on the detected electrical parameter- an air output (L) of the process air fan (16)- and/or a remaining drying time (At)- and/or in dependence on an instantaneous time gradient of the detected electrical parameter of the electric motor (4), a loading (B) of the drum (2), particularly the mass of the laundry introduced into the drum (2), and- the controlling and measuring device (6) controls a heat output for the drying process in dependence on at least the air output (L) and/or drying time (Δt) and/or loading (B) of the drum (2) determined by the controlling and measuring device (6).
- Laundry treatment appliance according to claim 1, characterised in that the controlling and measuring device (6) detects a current (I) through the electric motor (4) as an electrical parameter of the electric motor (4) and/or that the controlling and measuring device (6) detects an induced voltage (U) of the electric motor (4) as an electrical parameter of the electric motor (4) and that the controlling and measuring device (6) determines the loading (B) of the drum (2) and/or the air output (L) in dependence on the detected current (I) and/or the induced voltage (U).
- Laundry treatment appliance according to claim 2, characterised in that the controlling and measuring device (6) detects an amplitude of the current (I) through the electric motor (4) and/or a current envelope of the current (I) through the electric motor (4) and that the controlling and measuring device (6) determines the loading (B) of the drum (2) and/or the air output (L) also in dependence on the amplitude of the current (I) and/or the current envelope of the current (I).
- Laundry treatment appliance according to any one of claims 1 to 3, characterised in that the controlling and measuring device (6) determines the air output in dependence on an instantaneous time gradient of the detected electrical parameter of the electric motor (4) particularly the current (I) through the electric motor (4) and/or the induced voltage (U) of the electric motor (4).
- Laundry treatment appliance according to any one of claims 1 to 4, characterised in that the controlling and measuring device (6) determines the remaining drying time (Δt) in dependence on an instantaneous current (I) through the electric motor (4) and/or an instantaneous induced voltage (U) of the electric motor (4).
- Laundry treatment appliance according to any one of claims 1 to 5, characterised in that the controlling and measuring device (6) determines the remaining drying time (Δt) in dependence on an instantaneous time gradient of the current (I) through the electric motor (4) and/or an instantaneous time gradient of the induced voltage (U) of the electric motor (4).
- Laundry treatment appliance according to any one of claims 1 to 6, characterised in that the controlling and measuring device (6) determines the remaining drying time (Δt) in dependence on the loading (B) of the drum (2) and/or the air output (L) determined by the controlling and measuring device (6).
- Laundry treatment appliance according to any one of claims 1 to 7, characterised in that the controlling and measuring device (6) controls a rotational speed of the drum (2) in dependence on at least the loading (B) and/or air output (L) of the drum (2) determined by the controlling and measuring device (6).
- Laundry treatment appliance according to claim 8, characterised in that the controlling and measuring device (6) variably controls the rotational speed of the drum (2) during a drying process.
- Laundry treatment appliance according to any one of claims 1 to 9, characterised in that the controlling and measuring device (6) recognises overloading of the drum (2) in dependence on the determined loading (B).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009028358A DE102009028358B4 (en) | 2009-08-07 | 2009-08-07 | Laundry treatment device with an electric motor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2281935A1 EP2281935A1 (en) | 2011-02-09 |
EP2281935B1 true EP2281935B1 (en) | 2016-04-20 |
Family
ID=42712530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10171172.9A Active EP2281935B1 (en) | 2009-08-07 | 2010-07-29 | Laundry appliance with an electric motor |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2281935B1 (en) |
DE (1) | DE102009028358B4 (en) |
PL (1) | PL2281935T3 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011005164A1 (en) * | 2011-03-07 | 2012-09-13 | BSH Bosch und Siemens Hausgeräte GmbH | Method and device for drying a good |
EP2610388B1 (en) * | 2011-12-27 | 2016-03-16 | Electrolux Home Products Corporation N.V. | Laundry drying machine and control method thereof |
DE102012207740A1 (en) | 2012-05-09 | 2013-11-14 | BSH Bosch und Siemens Hausgeräte GmbH | Method for the load-dependent operation of a dryer and dryer suitable for this purpose |
DE102012216397A1 (en) | 2012-09-14 | 2014-03-20 | BSH Bosch und Siemens Hausgeräte GmbH | Condensation dryer with determination of the load and method for its operation |
EP2735643A1 (en) | 2012-11-26 | 2014-05-28 | Electrolux Home Products Corporation N.V. | A method for controlling a laundry dryer including a fan motor for driving a drying air stream fan with a variable speed |
EP2735642A1 (en) | 2012-11-26 | 2014-05-28 | Electrolux Home Products Corporation N.V. | A method for controlling a laundry dryer with a variable drum rotation speed and a variable fan rotation speed |
DE102012221693A1 (en) * | 2012-11-28 | 2014-05-28 | BSH Bosch und Siemens Hausgeräte GmbH | Method and device for determining the power of a household appliance |
CN104903507B (en) * | 2013-01-25 | 2017-09-12 | Lg电子株式会社 | Clothes treatment device |
DE102013210126A1 (en) | 2013-05-29 | 2014-12-04 | BSH Bosch und Siemens Hausgeräte GmbH | Method for operating a dryer with load detection and suitable dryer |
EP2927364B1 (en) * | 2014-03-31 | 2019-08-21 | Electrolux Appliances Aktiebolag | Method of conducting a drying cycle in a laundry treating machine, laundry treating machine and electronic controller unit |
EP2927367A1 (en) * | 2014-03-31 | 2015-10-07 | Electrolux Appliances Aktiebolag | Method of conducting a drying cycle in a laundry treating machine, laundry treating machine and electronic controller unit |
EP2927363B1 (en) * | 2014-03-31 | 2019-06-12 | Electrolux Appliances Aktiebolag | Method of conducting a drying cycle in a laundry treating machine, laundry treating machine and electronic controller unit |
DE102015201831A1 (en) | 2015-02-03 | 2016-08-04 | BSH Hausgeräte GmbH | Method for determining laundry properties and suitable condensation dryer |
DE102015221032A1 (en) * | 2015-10-28 | 2017-05-04 | BSH Hausgeräte GmbH | Laundry drying apparatus have a process air circuit and a volume flow determination device |
DE102016210265A1 (en) | 2016-06-10 | 2017-12-14 | BSH Hausgeräte GmbH | Method for determining the residual moisture content in a condensation dryer and suitable condensation dryer |
DE102016225113A1 (en) | 2016-12-15 | 2018-06-21 | BSH Hausgeräte GmbH | Method for operating a laundry treatment appliance with improved control and suitable laundry treatment appliance |
US11365509B2 (en) * | 2019-10-01 | 2022-06-21 | Whirlpool Corporation | Dual motor dryer drive contained within a common assembly |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH04193298A (en) * | 1990-11-27 | 1992-07-13 | Matsushita Electric Ind Co Ltd | Control for dryer |
EP2260138A1 (en) * | 2008-04-11 | 2010-12-15 | Diehl AKO Stiftung & Co. KG | Clothes drier |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3824799A1 (en) * | 1988-07-21 | 1990-01-25 | Licentia Gmbh | Control process for a laundry dryer working on the drum principle |
US5101575A (en) * | 1990-01-02 | 1992-04-07 | Whirlpool Corporation | Heater diagnostics and electronic control for a clothes dryer |
JP2634967B2 (en) | 1991-06-28 | 1997-07-30 | シャープ株式会社 | Fully automatic washing and drying machine |
US5899005A (en) * | 1997-03-13 | 1999-05-04 | General Electric Company | System and method for predicting the dryness of clothing articles |
DE19849403A1 (en) * | 1998-10-27 | 2000-05-04 | Ako Werke Gmbh & Co | Program control for washing machines |
DE102008019921A1 (en) * | 2008-04-21 | 2009-10-22 | BSH Bosch und Siemens Hausgeräte GmbH | Domestic appliance for drying laundry items and method for operating such a domestic appliance |
-
2009
- 2009-08-07 DE DE102009028358A patent/DE102009028358B4/en not_active Expired - Fee Related
-
2010
- 2010-07-29 PL PL10171172.9T patent/PL2281935T3/en unknown
- 2010-07-29 EP EP10171172.9A patent/EP2281935B1/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04193298A (en) * | 1990-11-27 | 1992-07-13 | Matsushita Electric Ind Co Ltd | Control for dryer |
EP2260138A1 (en) * | 2008-04-11 | 2010-12-15 | Diehl AKO Stiftung & Co. KG | Clothes drier |
Also Published As
Publication number | Publication date |
---|---|
PL2281935T3 (en) | 2016-10-31 |
DE102009028358A1 (en) | 2011-02-17 |
EP2281935A1 (en) | 2011-02-09 |
DE102009028358B4 (en) | 2012-03-08 |
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