EP2883997A1 - Appareil de séchage de linge et procédé de commande de condenseur dans un appareil de séchage de linge - Google Patents

Appareil de séchage de linge et procédé de commande de condenseur dans un appareil de séchage de linge Download PDF

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Publication number
EP2883997A1
EP2883997A1 EP14193589.0A EP14193589A EP2883997A1 EP 2883997 A1 EP2883997 A1 EP 2883997A1 EP 14193589 A EP14193589 A EP 14193589A EP 2883997 A1 EP2883997 A1 EP 2883997A1
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EP
European Patent Office
Prior art keywords
water
water outlet
condenser
outlet
control valve
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.)
Granted
Application number
EP14193589.0A
Other languages
German (de)
English (en)
Other versions
EP2883997B1 (fr
Inventor
Shanliang Qian
Henrik Birke
Wenfeng Pang
Thomas Schneider
Qi Zhang
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
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2883997A1 publication Critical patent/EP2883997A1/fr
Application granted granted Critical
Publication of EP2883997B1 publication Critical patent/EP2883997B1/fr
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/20General details of domestic laundry dryers 
    • D06F58/24Condensing arrangements
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/30Drying processes 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/20General details of domestic laundry dryers 
    • D06F58/22Lint collecting arrangements

Definitions

  • the present invention relates to the field of home appliances, and more particularly to a laundry drying apparatus and a method for controlling a condenser in a laundry drying apparatus.
  • a drying function for laundry applies process air at high temperature to laundry for drying, in order to evaporate and remove humidity from the laundry. Humidity thus evaporated and removed as vapor may then be condensed by use of a condenser which reduces the temperature of the process air and vapor contained therein, and transforms the vapor back to humidity.
  • a condenser is usually a water-cooled condenser or an air-cooled condenser.
  • the present invention relates to a water-cooled condenser, which is referred to as a condenser in short hereinafter.
  • the control of a condenser mainly includes a cooling function for condensing vapor, and a washing function for cleaning the condenser from fluff which is a fine particular matter extracted from the laundry being dried by the process air and retained in the condenser by means of the condensed humidity.
  • a cooling function for condensing vapor mainly includes a cooling function for condensing vapor, and a washing function for cleaning the condenser from fluff which is a fine particular matter extracted from the laundry being dried by the process air and retained in the condenser by means of the condensed humidity.
  • a relatively small water flow is mainly fed to the condenser. With the water consumption thus required, a more stable water flow achieves a better cooling effect.
  • washing is to clean impurities and sediments as fluff and possibly also residuals from washing liquids in the condenser, a relatively large water flow needs to be fed to the condenser.
  • two different water control valves are used to implement a cooling function and a washing function for a condenser.
  • a water control valve allowing a water flow of 0.5 l/min (liter/minute) or 0.25 l/min is used, and switching timing of that water control valve is controlled to achieve a water flow required;
  • a water control valve allowing 10 l/min or 8 l/min is used to wash the condenser.
  • a water control valve having a small flow rate for implementing a cooling function may have problems of relatively low precision of a flow rate allowance. Further, easy formation of sediments in a high temperature working environment might further affect precision.
  • the present invention provides a laundry drying apparatus and a method for controlling a condenser in a laundry drying apparatus, so as to implement a cooling function and a washing function for a condenser by using one water control valve.
  • a selection between a cooling function and a cleaning function is enabled by providing a water tank between the water inlet and the condenser, and a water control valve that may control admission of water to the water tank as follows: If cooling the condenser is desired, the admission of water to the water tank is limited for enabling flow of water through the second outlet only, thereby effecting the desired cooling. In this mode of operation the admission of water has to be limited to the flow that can leave the water tank through the second outlet without further increase of water level in the water tank.
  • the admission of water is increased, so as to raise the level of water in the water tank from the second outlet to the first outlet, thereby enabling flow of water through the first outlet in addition to the second outlet, for effecting the desired washing.
  • the water control valve is directly installed on the water inlet of the water tank, or the water control valve is connected to the water inlet of the water tank through a pipe.
  • the water tank further includes a vent hole.
  • the vent hole is located below the water inlet.
  • the first water outlet and the second water outlet are integrated on the condenser, or the first water outlet and the second water outlet are connected to the condenser through pipes.
  • a flow section of the first water outlet is larger than a flow section of the second water outlet; or, the number of the first water outlets is greater than the number of the second water outlets.
  • the present invention further provides a method for controlling a condenser in a laundry drying apparatus, the laundry drying apparatus further comprising a water control valve and a water tank, wherein the water control valve is connected to a water inlet of the water tank, the water tank comprises a first water outlet and a second water outlet, the first water outlet and the second water outlet are separately connected to the condenser, and the position of the first water outlet on the water tank is higher than that of the second water outlet, as determined relative to a direction of gravity, the method which includes:
  • a flow section of the first water outlet is larger than a flow section of the second water outlet; or, the number of the first water outlets is greater than the number of the second water outlets.
  • switching timing of the water control valve is controlled as follows: an ON duration is not longer than V/(m-m1), an OFF duration is not longer than time required for water in the water tank to completely flow away, where V is a water tank volume from the position of the first water outlet to a bottom portion of the water tank, m is a flow rate of the water control valve, and m1 is a flow rate of the second water outlet.
  • an ON duration of the water control valve is controlled to ensure that water flows out of the first water outlet.
  • a water control valve having a relatively large flow rate may be used, and in this way a problem of relatively low precision of a flow rate caused by a water control valve having a small flow rate can be alleviated.
  • a laundry drying apparatus includes a condenser 0, and further includes a water control valve 1 and a water tank 2.
  • the water tank 2 is on a right side of the condenser 0; however, this embodiment is not limited to such a position disposal relationship.
  • members in FIG. 1 are all schematically represented, and are not intended to limit the shapes of the members in a practical case.
  • the condenser 0 is schematically represented by a segment of pipe, and is not intended to limit the condenser in a practical case.
  • a water inlet 3 is provided at a top portion of the water tank 2 in FIG. 1 .
  • the water control valve 1 is connected to the water inlet 3.
  • Multiple connect manners may be used for the water control valve 1 and the water inlet 3.
  • the water control valve 1 may be directly installed on the water inlet 3, or the water control valve 1 may also be connected to the water inlet 3 through a pipe.
  • the water control valve 1 controls water to be fed to the water tank 2 through the water inlet 3.
  • a water backflow may occur for abnormal causes such as pressure. If water in the backflow contains pollutants, the Deutsche VGW (DVGW) test requirements fail to be met. Therefore, preferably, a vent hole 4 may be provided on the water tank 2 to prevent a water backflow. Certainly, if the DVGW test requirements are not taken into consideration, or the DVGW test requirements can be met in other manners, the vent hole 4 may also be omitted. In FIG. 1 , the vent hole 4 is disposed below the water inlet 3.
  • At least two water outlets are provided on the water tank 2. Two water outlets are used as an example in FIG. 1 .
  • the two water outlets have a certain height difference as determined relative to a direction of gravity, and herein the water outlet having a higher position as determined relative to a direction of gravity is called a first water outlet 5, and the water outlet having a lower position as determined relative to a direction of gravity is called a second water outlet 6.
  • the first water outlet 5 and the second water outlet 6 are separately connected to the condenser 0.
  • the first water outlet 5 and the second water outlet 6 may be connected to the condenser 0 by using an integral structure, or may also be connected to the condenser 0 through a pipe.
  • the second water outlet 6 may be disposed at a bottom portion of the water tank 2.
  • a flow section of the first water outlet 5 may be made larger than a flow section of the second water outlet 6.
  • the hole diameter of the first water outlet 5 may be set to be greater than that of the hole diameter, so that a relatively small water flow flows out of the second water outlet 6, and a relatively large water flow flows out of the first water outlet 5, so as to separately meet requirements for cooling and washing.
  • the number of the first water outlets 5 is greater than the number of the second water outlets 6, for example, 5 first water outlets 5 are disposed, and one second water outlet 6 is disposed; in this way, a water flow flowing out of the first water outlet 5 to the condenser 0 is also relatively large, and a water flow flowing out of the second water outlet 6 to the condenser 0 is relatively small, so as to meet separately meet requirements for cooling and washing.
  • the flow section of the first water outlet 5 is greater than the flow section of the second water outlet 6, and the number of the first water outlets 5 is greater than the number of the second water outlets 6. These two manners may be used at the same time. Specifically, the sizes of the flow sections and the numbers of the first water outlets 5 and the second water outlets 6 may be determined according to practical water amount demands of cooling water and washing water.
  • An ON duration is not longer than V/(m-m1), where V is a water tank volume from the position of the first water outlet 5 to a bottom portion of the water tank 2, m is a flow rate of the water control valve 1, and m1 is a flow rate of the second water outlet 6; the objective is to make that the water level of water fed in the water tank 2 is not higher than the first water outlet 5, so as to prevent water from flowing out of the first water outlet 5.
  • An OFF duration is not longer than time required for water in the water tank 2 to completely flow away; the objective to produce a flow interruption, so as to ensure that cooling water flowing to the condenser 0 is as stable as possible.
  • an ON duration of the water control valve 1 needs to be controlled to ensure that water flows out of the first water outlet 5; for example, the ON duration of the water control valve 1 may be made to be longer than V/(m-m1).
  • the duration of feeding water may be properly reduced.
  • the specific ON duration may be decided according to washing demands. In this way, water flows out of the first water outlet 5 to generate a relatively large water flow to be fed to the condenser 0, so as to implement the washing function for the condenser 0.
  • the water control valve 1 may be selected according to a specific volume of the water tank 2 and opening sizes of the first water outlet 5 and the second water outlet 6. A recommended range is 2 L/min to 15 L/min.
  • FIG. 2 shows the comparison of a group of experimental data.
  • Line 1 represents a water flow that is generated through the second water outlet 6 of the water tank 2 when a water control valve of 10 L/min is used by using the manner of the present invention.
  • Line 2 represents a water flow generated by using a manner in the prior art when a water control valve for implementing a cooling function is 0.5 L/min.
  • Line 3 represents a water flow in an optimal case, that is, a completely stable water flow.
  • a cooling water flow generated by using the manner of the present invention already has a relatively small fluctuation, and is closer to a completely stable water flow in comparison. If a standard difference of a flow rate is used to denote the magnitude of fluctuation of a flow rate, a standard difference of the cooling water flow generated by using the manner of the present invention is only 20% of the standard difference of the cooling water flow generated by using the manner in the prior art, and the stability is significantly increased, so as to ensure the effect of a cooling function.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP14193589.0A 2013-11-26 2014-11-18 Appareil de séchage de linge et procédé de commande d'un condenseur dans ledit appareil de séchage de linge Active EP2883997B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310608884.4A CN104674532B (zh) 2013-11-26 2013-11-26 衣物烘干设备和用于控制衣物烘干设备中冷凝器的方法

Publications (2)

Publication Number Publication Date
EP2883997A1 true EP2883997A1 (fr) 2015-06-17
EP2883997B1 EP2883997B1 (fr) 2016-09-21

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EP14193589.0A Active EP2883997B1 (fr) 2013-11-26 2014-11-18 Appareil de séchage de linge et procédé de commande d'un condenseur dans ledit appareil de séchage de linge

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EP (1) EP2883997B1 (fr)
CN (1) CN104674532B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106120278B (zh) * 2016-08-25 2018-08-17 海信(山东)冰箱有限公司 一种洗干一体机及其烘干控制方法
CN111623561A (zh) * 2019-02-27 2020-09-04 青岛海尔滚筒洗衣机有限公司 一种热泵式干衣机热泵系统降温方法及热泵式干衣机
DE102020108714A1 (de) * 2020-03-30 2021-09-30 Miele & Cie. Kg Verfahren zum Betreiben eines Waschautomaten und Waschautomat
CN113846473B (zh) * 2020-06-28 2024-07-16 苏州三星电子有限公司 冷凝喷嘴和洗衣机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0340403A2 (fr) * 1988-05-04 1989-11-08 A. MERLONI S.p.A. Dispositif de nettoyage pour conduit de circulation d'air, en particulier pour les parties de séchage des machines à laver et à sécher
GB2228308A (en) * 1989-02-17 1990-08-22 Servis Group Limited Drying machine with water spray condenser

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3346993B2 (ja) * 1996-09-13 2002-11-18 株式会社東芝 洗濯乾燥機
JP4457524B2 (ja) * 2001-06-05 2010-04-28 パナソニック株式会社 洗濯乾燥機
CN100519911C (zh) * 2004-11-30 2009-07-29 乐金电子(天津)电器有限公司 滚筒洗衣机
DE102007016074A1 (de) * 2007-04-03 2008-10-09 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und Vorrichtung zum Reinigen eines Bauteiles, insbesondere eines Verdampfers einer Kondensatoreinrichtung sowie Wasch- oder Wäschetrockner mit einer solchen Vorrichtung
JP2009061217A (ja) * 2007-09-10 2009-03-26 Toshiba Corp 衣類乾燥機
CN102995369A (zh) * 2012-12-21 2013-03-27 无锡小天鹅股份有限公司 干衣机

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0340403A2 (fr) * 1988-05-04 1989-11-08 A. MERLONI S.p.A. Dispositif de nettoyage pour conduit de circulation d'air, en particulier pour les parties de séchage des machines à laver et à sécher
GB2228308A (en) * 1989-02-17 1990-08-22 Servis Group Limited Drying machine with water spray condenser

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CN104674532A (zh) 2015-06-03
CN104674532B (zh) 2018-01-09
EP2883997B1 (fr) 2016-09-21

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