EP2403987B1 - Waschtrockner mit temperaturfühler - Google Patents

Waschtrockner mit temperaturfühler Download PDF

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Publication number
EP2403987B1
EP2403987B1 EP10707261A EP10707261A EP2403987B1 EP 2403987 B1 EP2403987 B1 EP 2403987B1 EP 10707261 A EP10707261 A EP 10707261A EP 10707261 A EP10707261 A EP 10707261A EP 2403987 B1 EP2403987 B1 EP 2403987B1
Authority
EP
European Patent Office
Prior art keywords
temperature detecting
detecting device
drying machine
process air
laundry
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
EP10707261A
Other languages
English (en)
French (fr)
Other versions
EP2403987A1 (de
Inventor
Wenfeng Pang
Zhihua Yan
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
Original Assignee
BSH Bosch und Siemens 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 Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2403987A1 publication Critical patent/EP2403987A1/de
Application granted granted Critical
Publication of EP2403987B1 publication Critical patent/EP2403987B1/de
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Classifications

    • 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
    • D06F34/18—Condition of the laundry, e.g. nature or 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
    • D06F2103/32—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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/12—Humidity or dryness of laundry
    • 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
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the present invention relates to a laundry drying machine, comprising a process air circulation circuit, a condensing device disposed within the process air circulation circuit and comprising at least one condensing passage, a temperature detecting device which comprises a head portion for sensing a temperature of the process air and a base portion connected therewith, wherein the temperature detecting device is mounted in the process air circulation circuit and at least a portion of which is disposed below the condensing device.
  • a laundry drying machine of this general type is disclosed in DE 195 22 307 C2 .
  • a device to adjust a relative humidity in solid bodies comprising a humidity sensor which is placed in a shielding chamber covered by a separating layer having a time constant for permeating humidity which is approximately equal to the respective time constant of the solid bodies is disclosed in DE 31 38 915 A1 .
  • a conventional laundry-drying machine generally includes a rotary drum rotatably mounted within an outer drum that receives and holds laundry in need of drying, a heating device for heating the process air to a certain temperature in order to remove moisture contained in the laundry, a blowing device that drives the process air circulation, and a condensing device condensing the moisture carried in the process air.
  • the process air is heated by means of said heating device to a system-preset temperature. Then, under the effect of the blowing device, the process air is delivered to within the rotary drum where it comes into extensive contact with laundry that was placed in the rotary drum. After heat exchange with the laundry has been effected, the moisture carried in the process air is condensed into water and then discharged by means of a pump. Then, the process air flowing through said condensing device, under effect of said blowing device, is drawn into said heating device and reheated. It then enters the next cycle.
  • a sensor is generally required to measure the temperature of the process air prior to entering the condensing device and after completion of the heat exchange. In this way, the level of laundry drying is accurately controlled.
  • the machine's outer drum and the condensing device There are very few positions between the machine's outer drum and the condensing device that are suitable for installing a sensor.
  • the sensor is installed near the inlet to the condensing device, which affects the precision of sensor measurement results and thereby affects control over laundry dryness.
  • process air from the rotary drum often will carry some lint, that is, small particulates like residuals of fibres, dirt or detergent.
  • some lint When flowing through the sensor, some lint will adhere to the sensor surface. Over a long period of time, accumulated lint will ultimately affect sensor precision.
  • the object of the present invention is to provide a laundry drying machine that will overcome the defect described above and thereby ensure accurate drying levels.
  • a laundry drying machine comprising a process air circulation circuit, a condensing device disposed within the process air circulation circuit and comprising a condensing passage; a temperature detecting device comprising a head portion for sensing temperature of the process air and a base portion connected therewith.
  • the temperature detecting device is mounted on the process air circuit, and at least a portion of the temperature detecting device is disposed below the condensing passage.
  • a shield is mounted above the head portion of the temperature detecting device, and the shield comprises an opening portion adjacent to a bottom side of said head portion of the temperature detecting device.
  • laundry drying machine refers to a machine that is dedicated to drying laundry solely as well as to a machine that is dedicated to other functions involving laundry besides drying laundry, with washing laundry being a prominent example of such other function.
  • An according machine dedicated both to washing and drying laundry is commonly referred to as washer-dryer.
  • said opening portion is adjacent to the bottom of said head portion so as to expose the area under said head portion to the air.
  • the large water flow drawn into the flushing device will, after reaching the bottom of the connecting duct, splash and spray onto the head portion of the temperature detecting device, thereby washing lint from the surface of the temperature detecting device.
  • the spraying by the flushing device generally occurs when the drying procedure has ended or has nearly ended it lasts for a very short period of time. Therefore, it will not negatively affect the precision of required data.
  • a flushing device is disposed above said condensing device, said temperature detecting device is mounted on a connecting duct which is connected to the condensing device and close to the bottom of said connecting duct.
  • said shield has a plurality of holes. Air flow is unobstructed because of these holes.
  • said shield comprises a side wall portion. Said holes are formed on said side wall portion. As the holes are disposed on the side wall, it is not easy for the water to flow across and enter the shield interior and from there drop onto the temperature detecting device.
  • each of said holes comprises a bottom wall which is inclined downwards along a direction from the inner side to the outer side. These inclined bottom walls can divert outwards the flow of water that has dropped onto their surfaces and prevent water drops from entering the shield interior and dropping from there onto the temperature detecting device.
  • a laundry drying machine 1 includes a rotatable drum 2 whose walls are provided with perforations and which is held in an outer drum 3 or tub 3.
  • the top of the outer drum 3 is provided with a heating tube assembly 4, in which is provided a heating device 5.
  • a condensing device 6 is provided behind the outer drum 3.
  • One end of the heating tube assembly 4 connects to an air inlet 7 provided on the outer drum 3.
  • One end of the condensing device 6 connects by means of a connecting duct 13 and a corrugated hose 9 to an air outlet 8 provided on the outer drum 3.
  • Another end of the heating tube assembly 4 connects to another end of the condensing device 6.
  • the heating tube assembly 4, the outer drum 3, the rotary drum 2, the condensing device 6, the connecting passage 13, and the corrugated hose 9 form an air circulation circuit.
  • a connecting duct 13 connects to the underside of the condensing device 6.
  • the other end of the connecting duct 13 connects to the corrugated hose 9 and through the latter further connects to the air outlet 8.
  • a blowing device 10 is provided between the condensing device 6 and the heating tube device 5.
  • process air traversing the process air passage is first heated by means of said heating device 5 and then supplied into the rotary drum 2, where it comes into extensive contact with damp laundry placed therein and evaporates the moisture in the laundry.
  • the steam-carrying process air then passes through the air outlet 8 on the outer drum 3 and enters the condensing device 6.
  • the condensing device 6 the moisture in the process air is condensed into water, which flows down the inner wall 14 (see FIG. 4 ) of the condensing device 6.
  • the process air from which moisture has been separated is drawn into the heating tube assembly 4 again, where it is reheated by said heating device 5. It thereby enters the next cycle to extract more moisture from the damp laundry.
  • Laundry produces much lint during the drying process by fibrous particles and residuals of dirt and detergent being torn off by the process air.
  • This lint enters the corrugated hose 9, the connecting duct 13, and the condensing device 6 and adheres to the inner walls of these components.
  • a flushing device 15 is mounted above the condensing device 6. It sprays water downward at set intervals to clean these components by washing off the lint which is in turn carried down into the outer drum 3 and discharged from there into a wastewater sink.
  • a temperature sensor 12 is mounted on the connecting duct 13 connected to the condensing device 6 and is near the bottom 19 of the connecting duct 13.
  • a shield 11 is mounted above the temperature sensor 12 to avoid contact between condensation from the condensing device 6 and the temperature sensor 12.
  • the condensing device 6 includes two condensing passages 16.
  • the temperature sensor 12 includes a heat portion 17 that senses process temperature and a base portion 18 connected therewith.
  • the head portion 17 is in part located under the condensing passage 16.
  • the shield 11 includes a mounting part 20, which is secured to the position-fixing frame 21 of the condensing device 6.
  • the shield 11 also includes two side wall portions 22 extending downwards from the mounting part 20.
  • the head portion 17 of the temperature sensor 12 is located between the two side wall portions 22.
  • the bottoms of the side wall portions 22 are separate from each other, thus forming an opening portion 23.
  • the opening portion 23 is nearly under the temperature sensor head portion 17.
  • the underside of the head portion 17 is exposed to the air which is not encircled by the shield 11. Therefore, after the water sprayed by the flushing device 15 reaches the bottom 19 of the connecting duct 13, it splashes and sprays the head portion 17 of the temperature sensor, washing off lint adhering to its surface.
  • Each of the two side wall portions 22 of the shield 11 has a plurality of holes 24 to facilitate passage of air inside and outside of the shield 11.
  • each hole 24 has a bottom wall 25 that is inclined downwards along a direction from the inner side to the outer side. These inclined bottom walls 25 can divert outwards the flow of water that has dropped onto their surfaces and prevent water drops from entering the shield 11 interior and dropping from there onto the temperature sensor 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (5)

  1. Wäschetrocknungsmaschine (1), die einen Prozessluftumlaufkreis (2, 3, 4, 6, 9, 13), eine Kondensationseinrichtung (6), die in dem Prozessluftumlaufkreis (2, 3, 4, 6, 9, 13) angeordnet ist und wenigstens einen Kondensationsdurchlass (16) aufweist, und einen Temperaturfühler (12), der einen Kopfabschnitt (17) zum Abfühlen einer Temperatur der Prozessluft und einen Basisabschnitt (18), der damit verbunden ist, aufweist, umfasst, wobei der Temperaturfühler (12) in dem Prozessluftumlaufkreis (2, 3, 4, 6, 9, 13) montiert ist und wenigstens ein Abschnitt hiervon unter der Kondensationseinrichtung (16) angeordnet ist, dadurch gekennzeichnet, dass über dem Kopfabschnitt (17) des Temperaturfühlers (12) eine Abschirmung (11) angebracht ist.
  2. Wäschetrocknungsmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass über der Kondensationseinrichtung (6) eine Spüleinrichtung (15) angeordnet ist, der Temperaturfühler (12) in einem Verbindungsrohrstutzen (13) angebracht ist, der mit der Kondensationseinrichtung (6) verbunden ist und sich in der Nähe des Bodens (19) des Verbindungsrohrstutzens (13) befindet, und die Abschirmung (11) in der Nähe der Unterseite des Kopfabschnitts (17) des Temperaturfühlers (12) einen Öffnungsabschnitt (23) aufweist.
  3. Wäschetrocknungsmaschine (1) nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die Abschirmung (11) mehrere Löcher (24) besitzt.
  4. Wäschetrocknungsmaschine (1) nach Anspruch 3, dadurch gekennzeichnet, dass die Abschirmung (11) einen Seitenwandabschnitt (22) aufweist, wobei die Löcher (24) in dem Seitenwandabschnitt (22) ausgebildet sind.
  5. Wäschetrocknungsmaschine (1) nach Anspruch 4, dadurch gekennzeichnet, dass jedes der Löcher (24) eine Bodenwand (25) aufweist, die in einer Richtung von der Innenseite zu der Außenseite der Abschirmung (11) nach unten geneigt ist.
EP10707261A 2009-03-02 2010-03-01 Waschtrockner mit temperaturfühler Active EP2403987B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200920035815U CN201386218Y (zh) 2009-03-02 2009-03-02 家用衣物烘干设备
PCT/EP2010/052549 WO2010100111A1 (en) 2009-03-02 2010-03-01 Laundry drying machine comprising a temperature detecting device

Publications (2)

Publication Number Publication Date
EP2403987A1 EP2403987A1 (de) 2012-01-11
EP2403987B1 true EP2403987B1 (de) 2012-05-23

Family

ID=41578748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10707261A Active EP2403987B1 (de) 2009-03-02 2010-03-01 Waschtrockner mit temperaturfühler

Country Status (3)

Country Link
EP (1) EP2403987B1 (de)
CN (1) CN201386218Y (de)
WO (1) WO2010100111A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2570548A1 (de) * 2011-09-19 2013-03-20 Electrolux Home Products Corporation N.V. Wäschetrockner mit mindestens einem Kondensator
CN104727112B (zh) * 2013-12-24 2018-05-08 博西华电器（江苏）有限公司 衣物处理设备
CN109402988B (zh) * 2017-08-16 2022-02-22 青岛海尔洗涤电器有限公司 烘干系统控制方法及衣物处理装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575193A (en) * 1968-05-20 1971-04-20 Whirlpool Co Total sensing combination washer-dryer
DE3138915A1 (de) * 1981-09-30 1983-04-14 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur einstellung der relativ-feuchte in festkoerpern
EP1974089B1 (de) * 2005-12-30 2009-02-25 Arçelik Anonim Sirketi Trockner

Also Published As

Publication number Publication date
CN201386218Y (zh) 2010-01-20
WO2010100111A1 (en) 2010-09-10
EP2403987A1 (de) 2012-01-11

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