EP3346050B1 - Wäschebehandlungsgerät und verfahren zum betreiben eines wäschebehandlungsgeräts - Google Patents

Wäschebehandlungsgerät und verfahren zum betreiben eines wäschebehandlungsgeräts Download PDF

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Publication number
EP3346050B1
EP3346050B1 EP17208891.6A EP17208891A EP3346050B1 EP 3346050 B1 EP3346050 B1 EP 3346050B1 EP 17208891 A EP17208891 A EP 17208891A EP 3346050 B1 EP3346050 B1 EP 3346050B1
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EP
European Patent Office
Prior art keywords
process air
treatment device
laundry treatment
laundry
drying
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.)
Active
Application number
EP17208891.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3346050A1 (de
Inventor
Kai-Uwe Bache
Alvaro Harbach
Andreas Stolze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL17208891T priority Critical patent/PL3346050T3/pl
Publication of EP3346050A1 publication Critical patent/EP3346050A1/de
Application granted granted Critical
Publication of EP3346050B1 publication Critical patent/EP3346050B1/de
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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
    • 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
    • D06F2103/28—Air properties
    • D06F2103/32—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
    • D06F2103/28—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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/62—Stopping or disabling machine operation
    • 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

Definitions

  • the invention relates to a laundry treatment device, in particular a tumble dryer or washer dryer, having at least one process air circuit in which process air can be circulated during a drying process for drying laundry in the process air circuit, at least one temperature sensor arranged on the process air circuit for detecting a temperature of the process air, at least one on the process air circuit arranged humidity sensor for detecting a relative humidity of the process air and at least one electronic unit connected to the temperature sensor and the humidity sensor, wherein the electronic unit is set up to determine a water load of the process air from the measured temperature and the measured relative humidity during the drying process and a To determine the maximum water load in the process air.
  • a laundry treatment device in particular a tumble dryer or washer dryer, having at least one process air circuit in which process air can be circulated during a drying process for drying laundry in the process air circuit, at least one temperature sensor arranged on the process air circuit for detecting a temperature of the process air, at least one on the process air circuit arranged humidity sensor for detecting a relative humidity of the process air and at least one electronic
  • the invention also relates to a method for operating a laundry treatment device which has at least one process air circuit in which process air can be circulated during a drying process for drying laundry located in the process air circuit, a temperature and a relative humidity of the process air being measured during the drying process during the drying process, a water load in the process air and a maximum water load in the process air are determined from the measured temperature and the measured relative air humidity.
  • a tumble dryer comprises a process air circuit in which process air is circulated while a drying process is being carried out.
  • the process air is guided through a container in which a laundry drum containing laundry to be dried is rotatably arranged and which forms a section of the process air circuit.
  • a degree of moisture or dryness of laundry to be dried within the laundry drum can conventionally, for example, be measured by measuring the electrical resistance the laundry can be determined.
  • a degree of humidity or degree of dryness of laundry to be dried within the laundry drum can conventionally be determined, for example, by measuring the relative humidity of the process air by means of a humidity sensor.
  • EP 3 255 204 A1 is considered state of the art according to Article 54 (3) EPC and discloses a laundry treatment device in the form of a clothes dryer or washer dryer.
  • the laundry treatment device has a process air circuit in which a process air can be circulated during a drying process for drying laundry located in the process air circuit.
  • the laundry treatment device has a temperature sensor arranged on the process air circuit for detecting a temperature of the process air, a humidity sensor arranged on the process air circuit for detecting a relative humidity of the process air, and an electronics unit connected to the temperature sensor and the humidity sensor.
  • the electronics unit is set up to determine a water load in the process air from the measured temperature and the measured relative humidity during the drying process and to determine a maximum water load in the process air.
  • EP 1 865 104 A1 discloses a drying cabinet with a process air circuit in which a process air can be circulated during a drying process for drying laundry located in the process air circuit. Furthermore, the drying cabinet has a temperature sensor arranged on the process air circuit for detecting a temperature of the process air, a humidity sensor arranged on the process air circuit for detecting a relative humidity of the process air, and an electronics unit connected to the temperature sensor and the humidity sensor.
  • DE 10 2006 053 274 A1 discloses a method for determining the load amount of laundry in a loading space with an air outlet of a clothes dryer, in particular an exhaust air dryer, the absolute humidity in the air outlet from the loading space being measured and the loading amount in the loading space by determining the maximum value and / or the course of the absolute air humidity is determined in the air outlet from the cargo space.
  • EP 0 428 846 A1 discloses a laundry dryer with a control system that includes a moisture content sensor for detecting a moisture content of the process air flowing out of a laundry drum of the laundry dryer.
  • the control system stores a maximum moisture content recorded during a drying process and compares this with a current moisture content of the process air recorded with the moisture content sensor, with the heating of the process air flowing into the laundry drum being reduced or interrupted if a difference between the currently recorded moisture content and the maximum moisture content occurs reached a predetermined value.
  • a laundry treatment device in particular a laundry dryer or washer dryer, comprises at least one process air circuit in which a process air can be circulated during a drying process for drying laundry located in the process air circuit, at least one temperature sensor arranged on the process air circuit for detecting a temperature of the process air, at least one humidity sensor arranged on the process air circuit for detecting a relative humidity of the process air and at least one electronic unit connected to the temperature sensor and the humidity sensor.
  • the electronics unit is set up to determine a water load of the process air from the measured temperature and the measured relative humidity during the drying process, to determine a maximum of the water load of the process air, to determine a value of a deviation of the current water load from the maximum of the water load and a switch-off signal to end the drying process when the value of the deviation reaches a predetermined limit value.
  • the drying process is not controlled and / or regulated as a function of the absolute humidity of the process air, as is conventional, but as a function of a deviation of the current water load in the process air from the determined maximum water load in the process air.
  • This makes the control and / or regulation of the drying process independent of the measurement accuracy and a drift of measured values of the moisture sensor over the service life of the moisture sensor. In particular, this allows conclusions to be drawn about the degree of dryness of the laundry to be dried, independently of the measurement accuracy of the moisture sensor.
  • the drying of the laundry is in a stationary state.
  • the relative humidity of the process air flowing out of the laundry drum of the laundry treatment device can rise to 100%.
  • Both the water loading of the process air to be introduced into the container and the water loading of the process air flowing out of the container have a maximum. Such a maximum of the water loading of the process air is continuously determined according to the invention during the drying process. As the laundry becomes increasingly dry, the water load in the process air decreases.
  • the total pressure p can be assumed to be constant in the present invention and corresponds to the air pressure in the vicinity of the laundry treatment appliance.
  • the vapor pressure p s (T) can be determined from the temperature measurement. Consequently, according to the invention, the water loading of the process air can be calculated from the temperature measurement and the measurement of the relative humidity.
  • the electronics unit can be formed by device electronics of the laundry treatment device or it can be designed as a separate unit.
  • the invention can be implemented cost-effectively by software implementation in the device electronics if the laundry treatment device additionally has the temperature sensor and the moisture sensor.
  • the electronics unit can itself use the switch-off signal generated to end the drying process when the value of the deviation reaches the predetermined limit value.
  • the process air circuit comprises at least one process air fan with which the process air can be circulated in the process air circuit during a drying process.
  • the process air circuit can have at least one process air filter for cleaning the process air.
  • the fact that the temperature sensor is arranged on the process air circuit means that it is at least partially arranged within the process air circuit in order to come into direct contact with the process air.
  • the fact that the moisture sensor is arranged on the process air circuit means that it is at least partially arranged within the process air circuit in order to come into direct contact with the process air.
  • the laundry treatment device can also have at least one heating device for heating the process air, which is arranged on the process air circuit.
  • the heating device can, for example, be designed as an electrical resistance heater or be formed by a heat exchanger of a heat pump.
  • the laundry treatment device comprises at least one condensation device arranged on the process air circuit for condensing moisture contained in the process air.
  • the condensation device can be designed as a heat exchanger of a heat pump or as a separate unit.
  • the laundry treatment device according to the invention can also have two or more temperature sensors for detecting the temperature of the process air and / or two or more moisture sensors for detecting the relative humidity of the process air.
  • the laundry treatment device can be designed as a laundry dryer, washer-dryer or cabinet dryer.
  • the moisture sensor is arranged with respect to a flow direction of the process air in the process air circuit in front of a container of the laundry treatment device, which receives a laundry drum of the laundry treatment device and forms a section of the process air circuit, and after a condensation device of the laundry treatment device arranged on the process air circuit. Since the relative humidity of the process air after passing through the condensation device is significantly lower than that of the process air flowing out of the container, the humidity sensor is exposed to a lower relative humidity. This prevents the humidity sensor from being adversely affected by high relative humidity, which would make the measurement of the relative humidity inaccurate.
  • This positioning of the moisture sensors is particularly advantageous when using several moisture sensors, since both the temperature and the relative humidity of the process air are subject to smaller fluctuations in the mentioned area of the process air circuit.
  • the measured values of the individual moisture sensors could in particular be at a maximum
  • the water loading of the process air and the water loading of the process air towards the end of the drying process differ so greatly from one another that precise control and / or regulation of the drying process would no longer be possible.
  • the present embodiment also makes a complex readout of the moisture sensors according to quality classes superfluous.
  • a temperature and a relative humidity of the process air are measured during the drying process During the drying process, a water load of the process air is determined from the measured temperature and the measured relative humidity, a maximum of the water load of the process air is determined, a value of a deviation of the current water load from the maximum of the water load is determined and the drying process is ended when the value of the deviation reached a predetermined limit.
  • the laundry treatment appliance is correspondingly associated with the method.
  • the laundry treatment device according to one of the aforementioned configurations or any combination of at least two of these configurations can be used to carry out the method.
  • the relative humidity of the process air with respect to a flow direction of the process air in the process air circuit is measured in front of a container of the laundry treatment device, which receives a laundry drum of the laundry treatment device and forms a section of the process air circuit, and after a condensation device of the laundry treatment device arranged on the process air circuit.
  • Fig. 1 shows a schematic illustration of an exemplary embodiment for a laundry treatment appliance 1.
  • the laundry treatment device 1 comprises a process air circuit 2 in which a process air can be circulated in accordance with the flow direction 3 during a drying process for drying laundry located in the process air circuit 2. Furthermore, the laundry treatment device 1 comprises a container 4, which receives a laundry drum 5 of the laundry treatment device 1 and forms a section of the process air circuit 2.
  • the laundry treatment device 1 comprises a temperature sensor 6 arranged on the process air circuit 2 for detecting a temperature of the process air. Furthermore, the laundry treatment device 1 comprises a moisture sensor 7 arranged on the process air circuit 2 for detecting a relative humidity of the process air. The laundry treatment device 1 further comprises an electronics unit 8 connected to the temperature sensor 6 and the moisture sensor 7.
  • the electronics unit 8 is set up to generate a water load from the measured temperature and the measured relative humidity during the drying process to determine the process air, to determine a maximum of the water load of the process air, to determine a value of a deviation of the current water load from the maximum of the water load and to generate a switch-off signal to end the drying process when the value of the deviation reaches a predetermined limit value.
  • the moisture sensor 7 and the temperature sensor 6 are arranged with respect to the flow direction 3 of the process air in the process air circuit 2 before the container 4 and after a condensation device 9 of the laundry treatment appliance 1 arranged on the process air circuit 2.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP17208891.6A 2017-01-09 2017-12-20 Wäschebehandlungsgerät und verfahren zum betreiben eines wäschebehandlungsgeräts Active EP3346050B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17208891T PL3346050T3 (pl) 2017-01-09 2017-12-20 Urządzenie do przetwarzania prania i sposób użytkowania urządzenia do przetwarzania prania

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017200177.1A DE102017200177A1 (de) 2017-01-09 2017-01-09 Wäschebehandlungsgerät und Verfahren zum Betreiben eines Wäschebehandlungsgeräts

Publications (2)

Publication Number Publication Date
EP3346050A1 EP3346050A1 (de) 2018-07-11
EP3346050B1 true EP3346050B1 (de) 2021-04-07

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EP17208891.6A Active EP3346050B1 (de) 2017-01-09 2017-12-20 Wäschebehandlungsgerät und verfahren zum betreiben eines wäschebehandlungsgeräts

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EP (1) EP3346050B1 (pl)
DE (1) DE102017200177A1 (pl)
PL (1) PL3346050T3 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3848501A1 (de) * 2020-01-13 2021-07-14 Schulthess Maschinen AG Vorrichtung und verfahren zur behandlung von wäsche

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428846A1 (en) * 1989-09-22 1991-05-29 Asko Cylinda Ab Tumble drier

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69002494T2 (de) * 1989-03-24 1993-11-25 Sanyo Electric Co Verfahren und Vorrichtung zur Steuerung eines Wäschetrockners.
US20030034443A1 (en) * 2001-01-12 2003-02-20 Kouznetsov Andrian I. Absolute humidity sensor to control drying equipment
ES2279674B1 (es) * 2005-03-23 2008-08-01 Ibai, S. Coop. Armario de desarrugado y secado de ropa.
DE102006053274A1 (de) 2006-11-06 2008-05-08 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Ermitteln der Ladungsmenge in einem Wäschetrockner und Wäschetrockner
US9206543B2 (en) * 2011-10-14 2015-12-08 Ecolab Usa Inc. Dryer monitoring
JP6089202B2 (ja) * 2012-09-20 2017-03-08 パナソニックＩｐマネジメント株式会社 除湿機
CN105696284B (zh) * 2014-12-09 2018-06-05 Lg电子株式会社 烘干机及其控制方法
DE102016210265A1 (de) * 2016-06-10 2017-12-14 BSH Hausgeräte GmbH Verfahren zur Ermittlung der Endrestfeuchte in einem Kondensationstrockner sowie hierfür geeigneter Kondensationstrockner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428846A1 (en) * 1989-09-22 1991-05-29 Asko Cylinda Ab Tumble drier

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EP3346050A1 (de) 2018-07-11
DE102017200177A1 (de) 2018-07-12
PL3346050T3 (pl) 2021-10-25

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