WO2007077072A1 - Appareil menager destine a secher un article humide et procede de determination du degre d'humidite dans un tel appareil menager - Google Patents

Appareil menager destine a secher un article humide et procede de determination du degre d'humidite dans un tel appareil menager Download PDF

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Publication number
WO2007077072A1
WO2007077072A1 PCT/EP2006/069277 EP2006069277W WO2007077072A1 WO 2007077072 A1 WO2007077072 A1 WO 2007077072A1 EP 2006069277 W EP2006069277 W EP 2006069277W WO 2007077072 A1 WO2007077072 A1 WO 2007077072A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
moisture
treatment chamber
domestic appliance
temperature
Prior art date
Application number
PCT/EP2006/069277
Other languages
German (de)
English (en)
Inventor
Andreas Stolze
Original Assignee
BSH Bosch und Siemens Hausgeräte 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 Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Publication of WO2007077072A1 publication Critical patent/WO2007077072A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0034—Drying phases, including dripping-off phases
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/48—Drying arrangements
    • A47L15/483—Drying arrangements by using condensers
    • 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
    • D06F34/26—Condition of the drying air, e.g. air humidity or temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
    • G01N25/62—Investigating or analyzing materials by the use of thermal means by investigating moisture content by psychrometric means, e.g. wet-and-dry bulb thermometers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/18—Air temperature
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/19—Air 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
    • 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 domestic appliance for drying a moist material with flowing air, comprising a treatment chamber for receiving the goods, a duct system for guiding the air through the treatment chamber and a measuring device for determining a moisture content of the goods.
  • the invention also relates to a method for determining a moisture level of flowing air in a domestic appliance for drying a moist material with the flowing air, wherein the domestic appliance comprises a treatment chamber for receiving the goods, a duct system for guiding the air through the treatment chamber and a measuring device for determining a degree of humidity of the air
  • Such a domestic appliance is designed in particular as a tumble dryer or dishwasher, wherein the good is a laundry or crockery.
  • the features mentioned apply to virtually every dryer and dishwasher of the prior art.
  • EP 0 942 094 B1 and EP 0 997 571 B1 each disclose such a domestic appliance in the form of a tumble dryer.
  • WO 2005/053502 A1 discloses such a domestic appliance in the form of a dishwasher.
  • the conductivity sensor determines a dependent on the content of moisture electrical conductance of the laundry.
  • Humidity sensor used to close from the measured relative humidity of the air flowing from the laundry to the moisture content of the laundry.
  • a psychrometer is an instrument with two thermometers for measuring humidity in air with high accuracy. From the air temperature, which measures the one thermometer, and from the so-called humidity temperature, which measures the other thermometer, one can on the relative humidity be closed.
  • the object is achieved by a domestic appliance with the features of claim 1 and a method having the features of claim 9.
  • the household appliance according to the invention for drying a moist material with flowing air comprising a treatment chamber for receiving the goods, a duct system for guiding the air through the treatment chamber and a measuring device for determining a moisture content of the goods, characterized in that the measuring device two in the channel system Having arranged downstream of the treatment chamber, located close to each other temperature sensors, of which a first temperature sensor is directly exposed to the effluent from the treatment chamber air and a second temperature sensor of a moisture-absorbing material, by which moisture from the flowing air can be accommodated, is surrounded.
  • the invention is based on the important realization that a psychrometer can be provided and work in a moisture-transporting air flow even if moistening is not predetermined externally at the second temperature sensor designated in the previous paragraph. Rather, it is sufficient to provide a moisture-absorbing material, which is then moistened automatically in the air flow of the humidified air and absorbs the liquid.
  • the air flow has a decreasing moisture content over time, as is the case with a drying process in a domestic appliance of the type discussed here, in any case, when the air flow leading system has heated up to a predetermined operating temperature and the drying process proceeds relatively stationary , So the adjustment of the moisture content of the material at the second temperature sensor by release, ie evaporation, of moisture, which is the psychrometer in function.
  • the air flow entrains a proportion of moisture condensed out, which is basically always the case in a household appliance of the type discussed here, a part of this condensed moisture is precipitated on the material of the second temperature sensor and also provides for the functionally required humidification of this material. So no separate source of liquid is needed.
  • the two temperature sensors emit electrically evaluable measuring signals, which are evaluated by an electrical evaluation unit.
  • the possible measurement signal pairings are in tabular form in the electrical evaluation unit, with each of them being assigned an air humidity of the air.
  • the humidity can also be calculated by the electronic evaluation unit from the two measurement signals.
  • the second temperature sensor particularly preferably measures a lower temperature (T 2 ) than a temperature (T 1 ) measured by the first temperature sensor, and is a humidity of the temperature measured from the difference between the temperatures measured by the two temperature sensors Treatment chamber outgoing air can be determined.
  • the domestic appliance is preferably designed as a tumble dryer, in which the treatment chamber is a rotatable drum.
  • the duct system is a substantially closed circuit for the flowing air.
  • "essentially closed” means that the circuit runs without significant leaks, but pressure equalization with an environment of the circuit is possible at any time.
  • the possibility can be provided to discharge part of the circulating air by opening flaps or the like and
  • a cold stage and a hot stage are provided, to which cold stage air flowing from the treatment chamber first passes and in which cold stage moisture from the air is condensable, and to which heat stage dehumidified air from the cold stage
  • the temperature sensors are arranged between an outlet opening of the treatment chamber and the cold stage.
  • the determination of the degree of moisture is repeated cyclically.
  • the entire drying process possibly with the exception of this process preliminary heating phase during which the domestic appliance and the material to be dried are heated above all to predetermined process temperatures, accompanied by the process, and controlled or regulated according to the measurement results of the process.
  • Another preferred development of the method according to the invention is characterized in that the flowing air passes condensed moisture past the temperature sensors, wherein the material absorbs this condensed moisture. This ensures that the material gets and maintains the moisture required for the function of the process for an extended period of time without any additional effort.
  • FIG. schematically illustrates a clothes dryer.
  • the schematically shown in FIG. illustrated tumble dryer 1 comprises a treatment chamber 10 in the form of a rotatable laundry drum 10, out of which via an outlet opening 12 led out air and into which via an inlet opening 14 air can be introduced. Via the outlet opening 12, the air enters a pipe 16, by means of a fan 18. The air is led to a cold stage 32.
  • a tumble dryer 1 with thermoelectric heat pump 20, 32, 34 is assumed, in which a plurality of Peltier elements 20 are arranged in series. The Peltier elements 20 are cold in the operating state on one side and warm on another side.
  • a hot stage 34 is formed both on the cold sides of a cold stage 32 and on the warm sides; Both at the cold stage 32 and at the hot stage 34 are suitable, not shown here for clarity heat exchanger assemblies coupled to the Peltier elements 20.
  • the air sucked out of the laundry drum 10 first reaches the cold stage 32, ie the cold sides of the Peltier elements 20.
  • the air coming from the laundry drum 10 is saturated with water, which comes from the laundry to be dried.
  • the moisture from the air condenses on the cold stage 32 now and is collected in a (not shown) container.
  • the dried cooled air is passed through the tube 22 into the tube 24 and thus passes to the hot stage 34, ie to the warm sides Peltier elements 20.
  • the dried air is heated and the heated air through the pipe 24 to the inlet opening 14 and thus back in the drum returned.
  • the air always absorbs moisture (in the drum 10) and releases moisture (at the cold stage 32). In the meantime, it is heated (at the heat level 34).
  • the first sensor 26 measures a temperature T 1 , directly the temperature of the air flow in the tube 16.
  • the second temperature sensor 28 is coated (illustrated by a white circle) with a moisture absorbing material 36, such as a cotton cover 36.
  • a cotton ball 36 can also surround the sensor 28.
  • the air flowing in the tube 16 is heavily laden with moisture, be it moisture in vapor form or moisture in condensed form, it adds moisture to the material 36, e.g. As the coating or cotton ball, and wets this.
  • the sensor 28 no longer measures the temperature T 1 directly; instead, the sensor 28 is cooled by the heat of evaporation of the moisture, so that a lower temperature T 2 is measured.
  • the two temperature sensors 26 and 28 work together as a psychrometer, in contrast to conventional psychrometers in this case an automatic wetting of the moisture-absorbing material is used in the air flow, instead of the sensor 28 is humidified by a separate operation or a separate device regardless of the air flow.
  • the two sensors 26 and 28 are followed by an electronic evaluation unit 30, the corresponding signals are supplied, which represent the temperatures T 1 and T 2 . From these signals, the electronic evaluation unit determines the humidity in the flowing through the pipe 16 Air flow, and so the degree of moisture of the laundry in the laundry drum 10 Often, this is done by evaluating a psychrometric table, in which pairings of the temperatures T 1 and T 2 is associated with a respective humidity.
  • the electronic evaluation unit 30 may alternatively or additionally use a Psych rometerformel, which is known under the name Sprungsche formula. From the observed temperature difference T 1 -T 2 , the vapor pressure e of
  • e is the water vapor partial pressure of the ambient air in hPa
  • E 2 is the saturation vapor pressure at the temperature of the moist surface in hPa
  • T 1 is the of
  • thermoelectric heat pump a thermoelectric heat pump
  • thermoelectric heat pump another heat pump
  • Temperature sensors 26 and 28 are arranged as close to the outlet opening 12 of the laundry drum 10 or other treatment chamber 10, to each
  • the two temperature sensors 26 and 28 are shown at a sufficient distance from the Peltier elements 20.
  • a psychrometer is used in the context of a domestic appliance to determine a humidity in order to conclude on the degree of humidity of a good to be dried. This is based essentially on the knowledge that the second temperature sensor 28 only has to be coated with a moisture-absorbing material 36, which absorbs moisture on its own and does not have to be specially moistened with moisture.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Drying Of Solid Materials (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

L'invention concerne un appareil ménager (1) destiné à sécher un article humide avec de l'air en circulation, comportant une chambre de traitement (10) destinée à recevoir l'article, un système de canal (16, 22, 24) destiné à guider l'air au travers de la chambre de traitement (10) et un dispositif de mesure (26, 28, 30) destiné à déterminer le degré d'humidité de l'article. Le dispositif de mesure (26, 28, 30) comporte deux capteurs de température (26, 28) disposés à proximité l'un de l'autre dans le système de canal (16, 22, 24), en aval de la chambre de traitement (10). Un premier capteur de température (26) est exposé directement à l'air sortant de la chambre de traitement (10), et un deuxième capteur de température (28) est entouré par un matériau (36) capable d'absorber l'humidité, absorbant l'humidité de l'air en circulation. L'appareil domestique (1) est notamment un sèche-linge (1). L'invention concerne également l'utilisation d'un psychromètre pour la mesure d'un degré d'humidité dans un tel appareil domestique (1).
PCT/EP2006/069277 2005-12-29 2006-12-04 Appareil menager destine a secher un article humide et procede de determination du degre d'humidite dans un tel appareil menager WO2007077072A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005062938A DE102005062938A1 (de) 2005-12-29 2005-12-29 Hausgerät zur Trocknung eines feuchten Gutes
DE102005062938.5 2005-12-29

Publications (1)

Publication Number Publication Date
WO2007077072A1 true WO2007077072A1 (fr) 2007-07-12

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PCT/EP2006/069277 WO2007077072A1 (fr) 2005-12-29 2006-12-04 Appareil menager destine a secher un article humide et procede de determination du degre d'humidite dans un tel appareil menager

Country Status (2)

Country Link
DE (1) DE102005062938A1 (fr)
WO (1) WO2007077072A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024046325A1 (fr) * 2022-08-31 2024-03-07 深圳洛克创新科技有限公司 Dispositif de traitement de vaisselle

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007050533A1 (de) * 2007-10-19 2009-04-23 Meiko Maschinenbau Gmbh & Co. Kg Geschirrspülmaschine mit verbesserter Wärmerückgewinnung
DE102007061519A1 (de) * 2007-12-20 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrocknungsgerät mit einer Feuchtigkeitsbestimmungseinrichtung und Ver-fahren zum Betreiben eines Wäschetrocknungsgeräts
US9895044B2 (en) 2012-08-28 2018-02-20 Whirlpool Corporation Dishwasher with controlled dry cycle
CN107747189B (zh) * 2017-10-31 2022-08-26 青岛胶南海尔洗衣机有限公司 一种烘干装置及洗衣机
CN113403821B (zh) * 2021-07-09 2023-03-17 海信冰箱有限公司 一种干衣机控制方法以及干衣机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB240618A (en) * 1924-09-03 1925-10-08 American Laundry Mach Co Improvements in drying apparatus
DE3111426A1 (de) * 1981-03-24 1982-10-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt "waeschetrockner"
EP0388939A1 (fr) * 1989-03-24 1990-09-26 Sanyo Electric Co., Ltd. Dispositif et procédé de réglage d'un sèche-linge
US5853246A (en) * 1995-02-06 1998-12-29 Lowder; Val Wet-bulb thermometer
DE19741843A1 (de) * 1997-09-23 1999-04-08 Agfa Gevaert Ag Psychrometer
EP0997571A2 (fr) * 1998-09-17 2000-05-03 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour surveiller l'air de séchage dans un séchoir à linge domestique et un séchoir à linge domestique utilisant un tel procédé

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19725536C2 (de) * 1997-06-17 2000-06-15 Miele & Cie Verfahren zum Steuern der Heizleistung eines Wäschetrockners

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB240618A (en) * 1924-09-03 1925-10-08 American Laundry Mach Co Improvements in drying apparatus
DE3111426A1 (de) * 1981-03-24 1982-10-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt "waeschetrockner"
EP0388939A1 (fr) * 1989-03-24 1990-09-26 Sanyo Electric Co., Ltd. Dispositif et procédé de réglage d'un sèche-linge
US5853246A (en) * 1995-02-06 1998-12-29 Lowder; Val Wet-bulb thermometer
DE19741843A1 (de) * 1997-09-23 1999-04-08 Agfa Gevaert Ag Psychrometer
EP0997571A2 (fr) * 1998-09-17 2000-05-03 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour surveiller l'air de séchage dans un séchoir à linge domestique et un séchoir à linge domestique utilisant un tel procédé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "Psychrometer", INTERNET ARTIKEL (WIKIPEDIA), 26 November 2005 (2005-11-26), XP002427716, Retrieved from the Internet <URL:http://de.wikipedia.org/w/index.php?title=Psychrometer&diff=11086423&oldid=9381660> [retrieved on 20070402] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024046325A1 (fr) * 2022-08-31 2024-03-07 深圳洛克创新科技有限公司 Dispositif de traitement de vaisselle

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