EP2458068B1 - Laundry drying equipment comprising a blower - Google Patents

Laundry drying equipment comprising a blower Download PDF

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Publication number
EP2458068B1
EP2458068B1 EP11189924.1A EP11189924A EP2458068B1 EP 2458068 B1 EP2458068 B1 EP 2458068B1 EP 11189924 A EP11189924 A EP 11189924A EP 2458068 B1 EP2458068 B1 EP 2458068B1
Authority
EP
European Patent Office
Prior art keywords
air
passage
drying equipment
drying
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
EP11189924.1A
Other languages
German (de)
French (fr)
Other versions
EP2458068A1 (en
Inventor
Ying Chang
Jie Gao
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.)
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Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL11189924T priority Critical patent/PL2458068T3/en
Publication of EP2458068A1 publication Critical patent/EP2458068A1/en
Application granted granted Critical
Publication of EP2458068B1 publication Critical patent/EP2458068B1/en
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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 
    • D06F58/24—Condensing arrangements

Definitions

  • the present invention relates to a household appliance for drying laundry, and more particularly to a blower in a condensing system of the household appliance.
  • An existing laundry drying equipment such as a washer-dryer integrating washing and drying functions is commonly disposed with a tub combination formed by a machine tub and a drum rotatably located in the machine tub, and laundry to be processed is dried in the drum.
  • the tub combination may be simply a drum.
  • the tub combination is connected to a condensing system and an air heating passage in turn. After a drying procedure of the laundry drying equipment is started, dry air is heated in the air heating passage to form dry hot air, and then enters the tub combination to exchange heat with wet laundry to take away moisture in the laundry to form relatively wet hot air.
  • the wet hot air enters the condensing system, and after the condensation action of the condensing system, moisture in the wet hot air is condensed into water.
  • the condensed air becomes relatively dry cold air.
  • the relatively dry cold air is guided into the air heating passage under the action of the fan to enter the next cycle. The process is repeated until the drying process ends.
  • Document DE 37 38 031 C2 discloses a condensing system using ambient air which is air drawn from the ambient of the laundry drying equipment as a condensing medium.
  • the condensing system using air as the condensing medium generally includes at least one drying air passage and at least one cooling air passage in communication with ambient air.
  • the relatively wet and hot air discharged from the tub combination flows through the drying air passage, and the ambient air flows through the cooling air passage.
  • the relatively wet hot air and the ambient air exchange heat so that the wet hot air is cooled, and water vapor in the wet hot air is condensed into water and separated from the air.
  • the condensing system may complete the cooling and dehumidification of the drying air through a heat absorber of a heat pump or sprayed water.
  • a driving device for driving the drying air is generally disposed in the circulation passage. Furthermore, for the condensing system using ambient air as the condensing medium, an air driving device also needs to be disposed in the cooling air passage so that ambient air continuously enters the cooling air passage and exchanges heat with the wet hot air in the drying air passage.
  • An objective of the present invention is to increase the drying efficiency of a laundry drying equipment.
  • a laundry drying equipment includes a tub combination, an air heating passage, a condensing system connected between the tub combination and the air heating passage, and a blower that allows air to pass through the condensing system, wherein the blower includes an air amplifier, which includes an annular wall, a high-pressure air inlet is disposed on the annular wall, and wherein the high-pressure air inlet is connected to an air pressurizer.
  • An advantage of the invention is that, through the air amplifier, the flow amount and speed of the air passing through the condensing system are greatly increased, so that the condensation efficiency is improved, thereby improving the drying efficiency of the equipment.
  • the condensing system includes a drying air passage and a cooling air passage, and the air amplifier is connected with at least one of the drying air passage and the cooling air passage.
  • the air amplifier is disposed on the drying air passage, so that the volume of air condensed in unit time can be increased, and the air amplifier is disposed on the cooling air passage, so that more cold air can participate in cooling in unit time, thereby taking away more heat and improving the condensation efficiency.
  • the air pressurizer is a fan.
  • the air pressurizer is a turbofan.
  • the cooling air passage is adjacent to the drying air passage.
  • a heat exchange device is disposed in the cooling air passage.
  • two ends of the cooling air passage are in communication with outer atmosphere.
  • a laundry drying equipment 10 includes a machine tub 12 and a drum 14 capable of rotating after being driven by an electrical motor and mounted in the machine tub 12. Laundry to be processed is dried in the drum 14. Numerous through holes (not shown) are formed in a wall of the drum 14. The drum 14 and the machine tub 12 communicate with each other in space through the through holes. The machine tub 12 and the drum 14 form a tub combination 13.
  • the machine tub 12 is connected to a condensing system 16 and a heating passage 20 in turn to form an air circulation passage 22.
  • a first blower 18 is mounted on the air circulation passage 22 to drive drying air to circularly flow in the air circulation passage 22 to take away moisture in the laundry.
  • a work flow of the laundry drying equipment 10 is as follows. Circulating air enters the drum 14 after being heated by the heating passage 20, and exchanges heat with wet laundry to take away the moisture in the laundry to form high-moisture and high-temperature air.
  • the high-moisture and high-temperature air enters the condensing system 16 from the machine tub 12. Under the condensation action of the condensing system 16, moisture in the high-moisture and high-temperature air is condensed into water.
  • the water flows into the machine tub 12 and is finally drained through a drainage system 24. Condensed drying air is guided into the heating passage 20 again under the action of the first blower 18 to enter the next cycle.
  • the condensing system 16 includes a cooling air inlet 34 and a cooling air outlet 36 communicating with the outside.
  • a second blower 38 sucks ambient air from the cooling air inlet 34 into the condensing system 16, which exchanges heat with drying air passing through the condensing system 16 to take away a part of heat of the drying air, and then is discharged from the cooling air outlet 36.
  • the condensing system 16 includes a drying air passage 2 and a cooling air passage 4 isolated from each other by a separation wall 8.
  • the cooling air passage 4 is installed with a heat exchange piece 6.
  • the circulating drying air 3 delivers the temperature to the separation wall 8, thereby delivering the temperature to the heat exchange piece 6 through the separation wall 8.
  • Outer cool air 5 entering the cooling air passage 4 passes through the heat exchange piece 6 to take away most heat to cool the wet hot drying air 3, so that moisture in the drying air 3 is condensed.
  • the second blower 38 includes an air amplifier 40.
  • the air amplifier 40 includes an annular wall 42.
  • a high-pressure air inlet 44 is disposed on the annular wall 42.
  • An air pressurizer 46 is connected to the high-pressure air inlet 44.
  • the air pressurizer 46 sucks air from the outside and injects pressurized air from the high-pressure air inlet 44 into the annular wall 42, so that high-speed high-volume air enters the cooling air passage 4 through the annular wall 42.
  • the air pressurizer 46 is a turbofan 46.
  • the Coanda air amplification effect (a basic principle of hydromechanics) is used.
  • a small amount of compressed air is fed and used as power, so as to form a reduced pressure region at one end of the annular wall and enable surrounding air to enter the reduced pressure region and be combined with the original compressed air to form a high-speed high-volume air flow passing through the annular wall of the air amplifier 40.
  • the air amplifier 40 may also be disposed in the first blower 18 to increase the flow speed and amount of the circulating drying air, so that more moisture is condensed in unit time, thereby improving the drying efficiency.
  • an air amplifier 40 may also be disposed in a blower 18 connected with a circulating air passage, so as to increase the flow speed and volume of circulating drying air passing through the condensing system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)

Description

  • The present invention relates to a household appliance for drying laundry, and more particularly to a blower in a condensing system of the household appliance.
  • An existing laundry drying equipment such as a washer-dryer integrating washing and drying functions is commonly disposed with a tub combination formed by a machine tub and a drum rotatably located in the machine tub, and laundry to be processed is dried in the drum. In a simple laundry dryer the tub combination may be simply a drum. The tub combination is connected to a condensing system and an air heating passage in turn. After a drying procedure of the laundry drying equipment is started, dry air is heated in the air heating passage to form dry hot air, and then enters the tub combination to exchange heat with wet laundry to take away moisture in the laundry to form relatively wet hot air. The wet hot air enters the condensing system, and after the condensation action of the condensing system, moisture in the wet hot air is condensed into water. The condensed air becomes relatively dry cold air. The relatively dry cold air is guided into the air heating passage under the action of the fan to enter the next cycle. The process is repeated until the drying process ends.
  • Document DE 37 38 031 C2 discloses a condensing system using ambient air which is air drawn from the ambient of the laundry drying equipment as a condensing medium. The condensing system using air as the condensing medium generally includes at least one drying air passage and at least one cooling air passage in communication with ambient air. The relatively wet and hot air discharged from the tub combination flows through the drying air passage, and the ambient air flows through the cooling air passage. The relatively wet hot air and the ambient air exchange heat so that the wet hot air is cooled, and water vapor in the wet hot air is condensed into water and separated from the air.
  • As an alternative to using ambient air for cooling, the condensing system may complete the cooling and dehumidification of the drying air through a heat absorber of a heat pump or sprayed water.
  • For the purpose of enabling the drying air to circularly flow in the tub combination, the condensing system and the air heating passage, a driving device for driving the drying air is generally disposed in the circulation passage. Furthermore, for the condensing system using ambient air as the condensing medium, an air driving device also needs to be disposed in the cooling air passage so that ambient air continuously enters the cooling air passage and exchanges heat with the wet hot air in the drying air passage.
  • During the operation of the laundry drying equipment, a lot of energy and time need to be consumed, so how to increase the drying efficiency is an objective to be achieved in this field.
  • An objective of the present invention is to increase the drying efficiency of a laundry drying equipment.
  • To achieve the above objective, the present invention adopts the technical solution defined by the independent claim attached. Preferred embodiments of the invention are defined in dependent claims as well as in the subsequent disclosure.
  • According to the invention a laundry drying equipment includes a tub combination, an air heating passage, a condensing system connected between the tub combination and the air heating passage, and a blower that allows air to pass through the condensing system, wherein the blower includes an air amplifier, which includes an annular wall, a high-pressure air inlet is disposed on the annular wall, and wherein the high-pressure air inlet is connected to an air pressurizer.
  • An advantage of the invention is that, through the air amplifier, the flow amount and speed of the air passing through the condensing system are greatly increased, so that the condensation efficiency is improved, thereby improving the drying efficiency of the equipment.
  • Preferably, the condensing system includes a drying air passage and a cooling air passage, and the air amplifier is connected with at least one of the drying air passage and the cooling air passage. The air amplifier is disposed on the drying air passage, so that the volume of air condensed in unit time can be increased, and the air amplifier is disposed on the cooling air passage, so that more cold air can participate in cooling in unit time, thereby taking away more heat and improving the condensation efficiency.
  • Preferably, the air pressurizer is a fan.
  • Preferably, the air pressurizer is a turbofan.
  • Preferably, the cooling air passage is adjacent to the drying air passage.
  • Preferably, a heat exchange device is disposed in the cooling air passage.
  • Preferably, two ends of the cooling air passage are in communication with outer atmosphere.
  • The detailed implementation of a preferred embodiment of the present invention will be described in the following, with reference to the attached drawing. In the drawing,
    • FIG. 1 is a schematic structural view of a laundry drying equipment; and
    • FIG. 2 is a schematic view showing the operating principle of a condensing system in FIG. 1.
  • As shown in FIG. 1, a laundry drying equipment 10 includes a machine tub 12 and a drum 14 capable of rotating after being driven by an electrical motor and mounted in the machine tub 12. Laundry to be processed is dried in the drum 14. Numerous through holes (not shown) are formed in a wall of the drum 14. The drum 14 and the machine tub 12 communicate with each other in space through the through holes. The machine tub 12 and the drum 14 form a tub combination 13. The machine tub 12 is connected to a condensing system 16 and a heating passage 20 in turn to form an air circulation passage 22. A first blower 18 is mounted on the air circulation passage 22 to drive drying air to circularly flow in the air circulation passage 22 to take away moisture in the laundry.
  • Specifically, a work flow of the laundry drying equipment 10 is as follows. Circulating air enters the drum 14 after being heated by the heating passage 20, and exchanges heat with wet laundry to take away the moisture in the laundry to form high-moisture and high-temperature air. The high-moisture and high-temperature air enters the condensing system 16 from the machine tub 12. Under the condensation action of the condensing system 16, moisture in the high-moisture and high-temperature air is condensed into water. The water flows into the machine tub 12 and is finally drained through a drainage system 24. Condensed drying air is guided into the heating passage 20 again under the action of the first blower 18 to enter the next cycle.
  • The condensing system 16 includes a cooling air inlet 34 and a cooling air outlet 36 communicating with the outside. A second blower 38 sucks ambient air from the cooling air inlet 34 into the condensing system 16, which exchanges heat with drying air passing through the condensing system 16 to take away a part of heat of the drying air, and then is discharged from the cooling air outlet 36.
  • As shown in FIG. 2, the condensing system 16 includes a drying air passage 2 and a cooling air passage 4 isolated from each other by a separation wall 8. The cooling air passage 4 is installed with a heat exchange piece 6. When flowing through the drying air passage 2, the circulating drying air 3 delivers the temperature to the separation wall 8, thereby delivering the temperature to the heat exchange piece 6 through the separation wall 8. Outer cool air 5 entering the cooling air passage 4 passes through the heat exchange piece 6 to take away most heat to cool the wet hot drying air 3, so that moisture in the drying air 3 is condensed.
  • Referring to FIG. 1 again, the second blower 38 includes an air amplifier 40. The air amplifier 40 includes an annular wall 42. A high-pressure air inlet 44 is disposed on the annular wall 42. An air pressurizer 46 is connected to the high-pressure air inlet 44. The air pressurizer 46 sucks air from the outside and injects pressurized air from the high-pressure air inlet 44 into the annular wall 42, so that high-speed high-volume air enters the cooling air passage 4 through the annular wall 42. Preferably, the air pressurizer 46 is a turbofan 46.
  • In brief, in the air amplifier 40, the Coanda air amplification effect (a basic principle of hydromechanics) is used. A small amount of compressed air is fed and used as power, so as to form a reduced pressure region at one end of the annular wall and enable surrounding air to enter the reduced pressure region and be combined with the original compressed air to form a high-speed high-volume air flow passing through the annular wall of the air amplifier 40.
  • Since a large amount of high-speed outer cold air passes through the cooling air passage 4, a large amount of heat can be taken away, so that the heat exchange efficiency is obviously higher than that obtained in the case that only a common fan is used to drive the cooling air, thereby effectively improving the drying efficiency.
  • In other implementations, the air amplifier 40 may also be disposed in the first blower 18 to increase the flow speed and amount of the circulating drying air, so that more moisture is condensed in unit time, thereby improving the drying efficiency.
  • In other implementations, for laundry drying devices using water or a heat pump for condensation or other laundry drying devices not using outer cold air for condensation, an air amplifier 40 may also be disposed in a blower 18 connected with a circulating air passage, so as to increase the flow speed and volume of circulating drying air passing through the condensing system.
  • The specific implementations described above description and shown in the accompanying drawings are merely provided for describing the present invention, but are not intended to limit the present invention. Any variation made to the present invention by persons of ordinary skill in the art within the scope of the basic technical idea of the present invention shall fall within the protection scope of the present invention.

Claims (7)

  1. A laundry drying equipment, comprising a tub combination (13), an air heating passage (20), a condensing system (16) connected between the tub combination and the air heating passage, and a blower (18, 38) that allows air to pass through the condensing system, characterized in that, the blower (18, 38) comprises an air amplifier (40) for increasing the flow amount end speed of air which comprises an annular wall (42), a high-pressure air inlet (44) disposed on the annular wall (42), and the high-pressure air inlet (44) connected with an air pressurizer (46).
  2. The laundry drying equipment according to claim 1, characterized in that the condensing system (16) comprises a drying air passage (2) and a cooling air passage (4), and the air amplifier (40) is connected with at least one of the drying air passage and the cooling air passage.
  3. The laundry drying equipment according to one of claims 1 and 2, characterized in that the air pressurizer (46) is a fan (46).
  4. The laundry drying equipment according to claim 3, characterized in that the air pressurizer (46) is a turbofan (46).
  5. The laundry drying equipment according to claim 2, characterized in that the cooling air passage (4) is adjacent to the drying air passage (2).
  6. The laundry drying equipment according to claim 5, characterized in that a heat exchange device (6) is disposed in the cooling air passage.
  7. The laundry drying equipment according to claim 5, characterized in that, two ends (34, 36) of the cooling air passage are in communication with outer atmosphere.
EP11189924.1A 2010-11-26 2011-11-21 Laundry drying equipment comprising a blower Active EP2458068B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11189924T PL2458068T3 (en) 2010-11-26 2011-11-21 Laundry drying equipment comprising a blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105697983A CN102477687A (en) 2010-11-26 2010-11-26 Clothes drying equipment

Publications (2)

Publication Number Publication Date
EP2458068A1 EP2458068A1 (en) 2012-05-30
EP2458068B1 true EP2458068B1 (en) 2013-05-29

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EP11189924.1A Active EP2458068B1 (en) 2010-11-26 2011-11-21 Laundry drying equipment comprising a blower

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EP (1) EP2458068B1 (en)
CN (1) CN102477687A (en)
PL (1) PL2458068T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105088713A (en) * 2014-04-17 2015-11-25 无锡小天鹅股份有限公司 Washing and drying all-in-one machine
CN108691175B (en) * 2014-07-24 2020-11-27 博西华电器（江苏）有限公司 Clothes dryer
KR102366933B1 (en) 2015-07-30 2022-02-23 엘지전자 주식회사 Device for treating laundry
CN106637875A (en) * 2015-11-04 2017-05-10 博西华电器（江苏）有限公司 Clothes dryer with assistant caring space
CN106592176B (en) * 2016-11-30 2019-05-21 无锡小天鹅股份有限公司 Straight-line dryer and condensing unit for straight-line dryer

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738031C2 (en) 1987-11-09 1995-10-12 Bosch Siemens Hausgeraete Method and device for removing lint from a condensate separator designed as a heat exchanger
DE19959977A1 (en) * 1999-12-13 2001-06-21 Bsh Bosch Siemens Hausgeraete Household condenser tumble dryer and process for its operation
KR100487329B1 (en) * 2002-10-10 2005-05-03 엘지전자 주식회사 Condensing Type Clothes Drier and Controlling the Same
EP1541744A1 (en) * 2003-12-11 2005-06-15 Electrolux Home Products Corporation N.V. Household clothes drying machine with improved condenser
ATE365827T1 (en) * 2004-04-28 2007-07-15 Electrolux Home Prod Corp HOUSEHOLD CLOTHES DRYER WITH TWO-STAGE CONDENSER
DE102006031353A1 (en) * 2006-07-06 2008-01-17 BSH Bosch und Siemens Hausgeräte GmbH Domestic appliance for the care of laundry items and method for conducting cooling air in such a household appliance
EP1925714B1 (en) * 2006-11-24 2012-02-08 Candy S.p.A. Apparatus and method for controlling the flow of drying air in a laundry drying machine
CN201433318Y (en) * 2009-07-06 2010-03-31 博西华电器（江苏）有限公司 Cloth baking equipment
CN201433319Y (en) * 2009-07-06 2010-03-31 博西华电器（江苏）有限公司 Cloth baking equipment
CN201463472U (en) * 2009-08-14 2010-05-12 张文标 Step type multistage structure strong wind drier
CN102182589B (en) * 2011-03-31 2013-03-27 潍柴动力股份有限公司 Air inlet system for engine

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Publication number Publication date
EP2458068A1 (en) 2012-05-30
PL2458068T3 (en) 2013-08-30
CN102477687A (en) 2012-05-30

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