EP2055826A1 - Sèche-linge à évacuation d'air doté d'une récupération de chaleur et cuve de condensation ainsi que son procédé de fonctionnement - Google Patents

Sèche-linge à évacuation d'air doté d'une récupération de chaleur et cuve de condensation ainsi que son procédé de fonctionnement Download PDF

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Publication number
EP2055826A1
EP2055826A1 EP08105513A EP08105513A EP2055826A1 EP 2055826 A1 EP2055826 A1 EP 2055826A1 EP 08105513 A EP08105513 A EP 08105513A EP 08105513 A EP08105513 A EP 08105513A EP 2055826 A1 EP2055826 A1 EP 2055826A1
Authority
EP
European Patent Office
Prior art keywords
air
exhaust air
exhaust
condensate
dryer
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
EP08105513A
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German (de)
English (en)
Other versions
EP2055826B1 (fr
Inventor
Klaus Grunert
Günter Steffens
Andreas Dr. 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
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.)
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Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2055826A1 publication Critical patent/EP2055826A1/fr
Application granted granted Critical
Publication of EP2055826B1 publication Critical patent/EP2055826B1/fr
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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements
    • 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 invention relates to an exhaust air dryer with heat recovery and condensate tray and a preferred method for its operation.
  • tumble dryers are operated as exhaust air or condensation dryers.
  • Condensation dryers whose operation is based on the condensation of moisture evaporated from the laundry by means of warm process air, do not require an exhaust hose and allow energy recovery from the heated process air, for example by using a heat pump.
  • condensation dryers generally require that the accumulated condensate be collected and either pumped off or disposed of by manually emptying catch containers.
  • the DE 30 00 865 A1 discloses a clothes dryer with heat recovery.
  • the tumble dryer consists of a container receiving and moving the laundry, into which a supply air flow heated by a heating element opens, while the moist hot air is conducted as exhaust air via an outlet.
  • a heat exchanger is arranged in front of the heating element, which is flowed through by the moist hot exhaust air from the container.
  • a tumble dryer is described with a heat pump circuit, in which a supply air opening is arranged in the process air channel between the condenser and the evaporator, which is closable with a controllable closure device.
  • ambient air of, for example, 20 ° C. and 60% relative humidity, so-called supply air
  • supply air generally flows into the heat exchanger surfaces of an air-to-air heat exchanger and is cooled therefrom, leaving the drying chamber heated up warm process air.
  • condensate is produced which is collected or pumped away in a container (condensate tray).
  • a container indensate tray.
  • the amount of accumulating condensate is a measure of the heat energy emitted in the heat exchanger and thus a measure of the improvement of energy efficiency.
  • Object of the present invention was to provide a vented dryer with high energy efficiency, in which it is unnecessary to pump out condensate or to empty a condensate pan.
  • the invention thus relates to an exhaust air dryer with a drying chamber for objects to be dried, a supply air duct for process air in which there is a heater for heating supply air and the heated supply air (process air) can be performed by means of a first blower on the objects to be dried, an exhaust duct, a motor for driving the drying chamber, a first heat exchanger in the exhaust duct and arranged below the first heat exchanger condensate pan, wherein the exhaust air dryer has first means for discharging warm air from a motor housing comprehensive housing interior to the condensate pan and across.
  • the heating for heating the exhaust air may be, for example, an electrical resistance heater and / or a second heat exchanger.
  • an electrical resistance heater and a second heat exchanger are used.
  • the second heat exchanger can be an air-to-air heat exchanger, in which the warm air from the drying chamber is used for heating the process air, or the condenser of a heat pump.
  • the exhaust air duct between the first heat exchanger and an exhaust outlet on an opening which due to a suction effect caused by passing through the opening exhaust air (venturi effect), the entrainment (also called “entrainment”) of allows air above the condensate tray.
  • the opening is preferably located above the condensate tray.
  • the aforesaid first means comprise a second fan (also termed an "evaporative fan") which directs the warm air from a housing interior comprising the engine to and from the condensate tray.
  • a second fan also termed an "evaporative fan” which directs the warm air from a housing interior comprising the engine to and from the condensate tray.
  • the first fan and the second fan are driven by the same motor. It is particularly preferred here that the first fan and the second fan are arranged on opposite sides of the engine. Most preferably, this motor is the motor that is also used to drive the drying chamber.
  • the above-mentioned first means are, for example, an embodiment of the interior of the housing and of the air passages in the region of the engine and the supply line from the housing interior to the condensate pan, which enables effective removal of the waste heat, and finally the means for discharging the warm air, such as, for example second fan and / or a hole in the exhaust duct between the exhaust air outlet and the first heat exchanger.
  • the aforesaid first means are preferably chosen so as to allow the discharge of warm air at a rate of 10 to 100 m 3 / hour.
  • the dryer according to the invention has at least one first heat exchanger, by means of which the heat contained in the exhaust air is recovered in the condensate tray with the formation of condensate.
  • This may be an air-to-air heat exchanger, in which the moist, hot process air from the drying chamber (drum) is used to heat supply air, which is then fed to the drying chamber.
  • an evaporator of a heat pump circuit can be used as the first heat exchanger.
  • a dryer equipped with a heat pump the cooling of the warm, moisture-laden process air essentially takes place in the evaporator of the heat pump, where the heat transferred is used to evaporate a refrigerant used in the heat pump cycle.
  • the refrigerant of the heat pump evaporated due to the heating is supplied via a compressor to the condenser of the heat pump, where due to the condensation of the gaseous refrigerant heat is released, which is used to heat the supply air before entering the drying chamber (drum).
  • the condenser of the heat pump is in the supply air duct between the first fan and the heater or between the first fan and the supply air access.
  • each can form condensate.
  • more than one condensate tray can be used.
  • the condensate tray is preferably designed so that it can hold a sufficient amount of condensate, generally at least 0.5 l.
  • the accumulated amount of condensate and thus the predetermined capacity of the condensate tray for condensate will usually depend on the efficiency of the first heat exchanger. However, in general, with a capacity of the exhaust air dryer of 5 kg of laundry with 60% relative humidity, a capacity of at least 0.5 l will be required.
  • the condensate tray has second means for detecting and / or discharging a quantity of condensate exceeding a predetermined limit quantity.
  • a second container may be provided, which can catch any overflowing condensate.
  • an audible and / or visual warning indication can take place.
  • a body having a high surface area is present in the condensate tray.
  • This body is preferably a fleece.
  • the evaporation of the condensate is generally particularly effective at the beginning and towards the end of a drying process, since in both cases, the loading of the process air with moisture is relatively low.
  • the dryer according to the invention is preferably designed so that this residual condensate evaporates during the cooling of the dryer. This can be done, for example, in the embodiment with an opening between the exhaust air outlet and the first heat exchanger by the fact that in the presence of an external exhaust pipe - especially in windy weather - a small air flow in the area of the condensate tray.
  • exhaust air and supply air and / or refrigerant in the heat pump are each passed through the corresponding heat exchangers in a crossflow or countercurrent process.
  • the heating is appropriately regulated, that is to say in accordance with the invention. As the degree of drying progresses, its heat output is reduced.
  • the invention also relates to a method for operating an exhaust air dryer with a drying chamber for objects to be dried, a supply air duct for process air, in which there is a heater for heating the supply air and the heated supply air (process air) by means of a first blower on the objects to be dried can be performed, an exhaust duct, a motor for driving the drying chamber, a first heat exchanger in the exhaust duct, arranged below the first heat exchanger condensate pan and first means for discharging warm air from the motor housing comprehensive housing interior to the condensate pan and across, wherein during operation of the exhaust air dryer in the condensate pan condensate by means of warm air, which consists of the motor housing comprehensive interior is led to the condensate pan and over this away, is evaporated and the resulting warm, moist air is led out of the exhaust air dryer.
  • a second fan directs the warm air from the housing interior, which surrounds the engine, to the drain pan and over it.
  • the warm and humid air guided over the condensate pan can be conveyed either directly into the installation room of the dryer or mixed into the exhaust air of the dryer.
  • the exhaust air dryer according to the invention and the method according to the invention for its operation have the advantage that the exhaust air dryer falls into a better energy efficiency class and accumulating condensate can be transported to the outside only by removal by means of exhaust air without the need for a condensate pan or a pump to be emptied.
  • the invention has the advantage that, according to the invention, the waste heat of the engine is dissipated. Due to the active cooling of the motor this can be made smaller in terms of laminated core and winding.
  • FIGS. 1 to 3 Further details of the invention will become apparent with reference to the FIGS. 1 to 3 from the following description of non-limiting embodiments of the exhaust air dryer according to the invention and the method for operating this exhaust air dryer.
  • FIG. 1 shows a vertically cut exhaust air dryer (hereinafter abbreviated to "dryer”) according to an embodiment of the invention, in which both an opening in the exhaust duct between exhaust outlet and first heat exchanger as well as a second fan for the transport of warm air from a housing interior to the condensate pan is used.
  • dryer vertically cut exhaust air dryer
  • FIG. 2 shows a section of an embodiment of an exhaust air dryer according to the invention.
  • Fig. 3 shows a section of a further embodiment of an exhaust air dryer according to the invention.
  • the in FIG. 1 shown dryer 1 has a drum rotatable about a horizontal axis as a drying chamber 3, are mounted within which driver 4 for moving laundry during a drum rotation.
  • Supply air is conducted by means of a first blower 19 from the supply air inlet 11 through a supply air duct 2 via a condenser 12 of a heat pump 12,13,14,15 as a second heat exchanger and a heater 18 through the drum 3.
  • the laden with moisture process air as exhaust air is further passed through an exhaust duct 16 via an evaporator 14 of a heat pump 12,13,14,15 and an exhaust outlet 17 the installation room of the dryer 1.
  • the moist, warm process air is cooled and, after condensation of the moisture contained in the process air, is conducted as exhaust air into the installation space of the dryer.
  • heated air from the heater 18, ie from the side of the drum 3 opposite a door 5 is passed through the perforated bottom into the drum 3, where it comes into contact with the laundry to be dried and flows through the filling opening of the drum 3 to a lint filter 6 within a closing the filling opening door 5.
  • the air flow in the door 5 is deflected downward and directed from the exhaust duct 16 to the evaporator 14 of the heat pump 12,13,14,15.
  • the moisture absorbed by the process air from the items of laundry condenses there and is collected in a condensate tray 20.
  • the cooled and dehumidified process air leaves the exhaust air duct 16 at the exhaust air outlet 17 as exhaust air.
  • a warm air stream which originates from the surroundings of a motor 21 for driving the drum 3 and the first blower 19, is conducted via the feed line 25 via the condensate located in the condensate tray 20.
  • the condensate evaporates and is continued by the warm, now humid air flow.
  • the continuation of the warm humid air flow takes place at the in FIG. 1 shown embodiment through an opening 22 in the exhaust duct 16, which is located in the region of the condensate pan, preferably above the condensate pan.
  • the opening 22 connects the gaseous phase on the condensate tray with the exhaust air in the exhaust duct 16 of the exhaust air dryer.
  • the exhaust air guided through the opening 22 creates a suction (Venturi effect), which leads to entrainment of the warm, moist air above the condensate.
  • Venturi effect the warm air flow from the environment of the Motor 21 with the aid of a second blower 23 ("evaporation fan") through the supply line 25 via the condensate contained in the condensate tray 20 condensate.
  • a second blower 23 evaporation fan
  • the moist, warm process air is led to the evaporator 14 of a heat pump 12, 13, 14, 15, where it is cooled.
  • the refrigerant of the heat pump evaporated in the evaporator 14 is conducted to the condenser 12 via a compressor 13.
  • the condenser 12 the refrigerant liquefies with release of heat to the entering through the Zu Kunststoffeingang 11 supply air in the supply air channel 2.
  • the now in liquid form refrigerant is again passed through a throttle valve 15 to the evaporator 14, whereby the refrigerant circuit is closed.
  • the drum 3 is in the in Fig. 1 shown embodiment at the rear bottom by means of a pivot bearing and front mounted by means of a bearing plate 7, wherein the drum 3 rests with a brim on a sliding strip 8 on the bearing plate 7 and is held at the front end.
  • the control of the exhaust air dryer via a control device 10, which can be controlled by the user via an operating unit 9.
  • the first blower 19, the second blower 23 and the drum 3 are driven by the same motor 21, with the first blower 19 and the second blower 23 on opposite sides of the engine 21.
  • a body 26 with a large surface, preferably a fleece, is located in the condensate tray 20.
  • the body 26 has the task to assist by distribution of the condensate over a large area of its evaporation.
  • FIG. 2 shows a section of a further embodiment of an exhaust air dryer according to the invention.
  • warm air from the housing interior, in particular the environment of the motor 21, not shown here by means of a second fan 23 ("evaporation fan") in a feed line 25 to the condensate pan 20, in which the condensate collected at the first heat exchanger 14 is collected .
  • the condensate can easily evaporate due to the warm air flow.
  • the evaporated condensate is carried by the warm air flow and can - in FIG. 2 not shown in detail - either discharged directly into the installation room for the exhaust air dryer or its exhaust air are mixed in the exhaust duct 16.
  • Fig. 3 shows a section of a further embodiment of an exhaust air dryer according to the invention.
  • the warm air from the environment of the motor 21, not shown here is conducted in a supply line 25 due to the suction effect occurring at an opening 22 in the exhaust duct 16 via the condensate located in a condensate tray 20 without the aid of a second blower.
  • the evaporated condensate containing air is transported together with the exhaust air in the installation room of the exhaust air dryer.
  • Fig. 3 14 means a first heat exchanger.
  • FIGS. 2 and 3 can also be combined, as for example in FIG. 1 is shown.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
EP08105513A 2007-10-31 2008-10-08 Sèche-linge à évacuation d'air doté d'une récupération de chaleur et cuve de condensation ainsi que son procédé de fonctionnement Active EP2055826B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007052079A DE102007052079A1 (de) 2007-10-31 2007-10-31 Ablufttrockner mit Wärmerückgewinnung und Kondensatwanne sowie Verfahren zu seinem Betrieb

Publications (2)

Publication Number Publication Date
EP2055826A1 true EP2055826A1 (fr) 2009-05-06
EP2055826B1 EP2055826B1 (fr) 2010-12-22

Family

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EP08105513A Active EP2055826B1 (fr) 2007-10-31 2008-10-08 Sèche-linge à évacuation d'air doté d'une récupération de chaleur et cuve de condensation ainsi que son procédé de fonctionnement

Country Status (4)

Country Link
US (1) US20090119943A1 (fr)
EP (1) EP2055826B1 (fr)
AT (1) ATE492679T1 (fr)
DE (2) DE102007052079A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20091803A1 (it) * 2009-10-20 2011-04-21 Candy Spa Elettrodomestico con un sistema di raffreddamento del condensatore perfezionato
US20140373379A1 (en) * 2013-06-20 2014-12-25 Lg Electronics Inc. Dryer with a waste heat recovery means
US10053813B2 (en) 2013-08-23 2018-08-21 BSH Hausgeräte GmbH Laundry treatment apparatus comprising a receiving device
CN113188305A (zh) * 2021-04-30 2021-07-30 北京汉浦科技有限公司 一种船用木材真空干燥系统的控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10557229B2 (en) * 2018-03-21 2020-02-11 Haier Us Appliance Solutions, Inc. Blockage detection in a dryer appliance

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000865A1 (de) 1980-01-11 1981-07-16 Fichtel & Sachs Ag, 8720 Schweinfurt Waeschetrockner mit waermerueckgewinnung
DE3928698A1 (de) * 1989-08-30 1991-03-07 Albrecht Wulff Trocknungsverfahren und waeschetrockner zur durchfuehrung des verfahrens
DE4023000A1 (de) * 1990-07-19 1992-01-23 Bosch Siemens Hausgeraete Waeschetrockner mit einem waermepumpenkreis
DE19743509A1 (de) * 1997-10-01 1999-04-08 Bosch Siemens Hausgeraete Haushalt-Wäschetrockner mit einem Wäschefeuchtigkeit abführenden Prozeßluft-Kreis
EP1516953A1 (fr) * 2003-09-22 2005-03-23 Electrolux Home Products Corporation N.V. Sèche-linge domestique silencieux à condensation
WO2007061206A1 (fr) * 2005-11-24 2007-05-31 Lg Electronics Inc. Sechoir

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US3032887A (en) * 1958-05-02 1962-05-08 Gen Motors Corp Clothes drier
US3942265A (en) * 1974-05-09 1976-03-09 General Electric Company Dryer control arrangement
US4103433A (en) * 1976-11-08 1978-08-01 Q-Dot Corporation Home laundry dryer
US4700492A (en) * 1986-02-05 1987-10-20 Whirlpool Corporation Air actuated automatic lint screen cleaning system for dryer
DE3735551C1 (de) * 1987-10-21 1988-12-15 Loh Kg Rittal Werk Vorrichtung zum Entfernen von Tauwasser aus einem kompressorbetriebenen Kuehlgeraet
EP1564325B1 (fr) * 2004-02-10 2018-04-11 Electrolux Home Products Corporation N.V. Sèche-linge amélioré avec possibilité de lisser des habits
JP4783125B2 (ja) * 2005-11-17 2011-09-28 株式会社東芝 衣類乾燥機
DE102005062616B4 (de) * 2005-12-23 2021-10-28 Dbk David + Baader Gmbh Durchlaufverdunster zum Abtransport einer Flüssigkeit
DE102007011809A1 (de) * 2007-03-12 2008-09-18 BSH Bosch und Siemens Hausgeräte GmbH Trockner mit Wärmerückgewinnung sowie Verfahren zu seinem Betrieb

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000865A1 (de) 1980-01-11 1981-07-16 Fichtel & Sachs Ag, 8720 Schweinfurt Waeschetrockner mit waermerueckgewinnung
DE3928698A1 (de) * 1989-08-30 1991-03-07 Albrecht Wulff Trocknungsverfahren und waeschetrockner zur durchfuehrung des verfahrens
DE4023000A1 (de) * 1990-07-19 1992-01-23 Bosch Siemens Hausgeraete Waeschetrockner mit einem waermepumpenkreis
DE4023000C2 (de) 1990-07-19 2003-02-27 Bsh Bosch Siemens Hausgeraete Wäschetrockner mit einem Wärmepumpenkreis
DE19743509A1 (de) * 1997-10-01 1999-04-08 Bosch Siemens Hausgeraete Haushalt-Wäschetrockner mit einem Wäschefeuchtigkeit abführenden Prozeßluft-Kreis
EP1516953A1 (fr) * 2003-09-22 2005-03-23 Electrolux Home Products Corporation N.V. Sèche-linge domestique silencieux à condensation
WO2007061206A1 (fr) * 2005-11-24 2007-05-31 Lg Electronics Inc. Sechoir

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20091803A1 (it) * 2009-10-20 2011-04-21 Candy Spa Elettrodomestico con un sistema di raffreddamento del condensatore perfezionato
US20140373379A1 (en) * 2013-06-20 2014-12-25 Lg Electronics Inc. Dryer with a waste heat recovery means
US9441322B2 (en) * 2013-06-20 2016-09-13 Lg Electronics Inc. Dryer with a waste heat recovery means
US10053813B2 (en) 2013-08-23 2018-08-21 BSH Hausgeräte GmbH Laundry treatment apparatus comprising a receiving device
CN113188305A (zh) * 2021-04-30 2021-07-30 北京汉浦科技有限公司 一种船用木材真空干燥系统的控制方法
CN113188305B (zh) * 2021-04-30 2023-11-17 张国华 一种船用木材真空干燥系统的控制方法

Also Published As

Publication number Publication date
DE502008002062D1 (de) 2011-02-03
DE102007052079A1 (de) 2009-05-07
US20090119943A1 (en) 2009-05-14
ATE492679T1 (de) 2011-01-15
EP2055826B1 (fr) 2010-12-22

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