EP2314757A1 - Household appliance with improved condenser cooling system - Google Patents
Household appliance with improved condenser cooling system Download PDFInfo
- Publication number
- EP2314757A1 EP2314757A1 EP09425411A EP09425411A EP2314757A1 EP 2314757 A1 EP2314757 A1 EP 2314757A1 EP 09425411 A EP09425411 A EP 09425411A EP 09425411 A EP09425411 A EP 09425411A EP 2314757 A1 EP2314757 A1 EP 2314757A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- household appliance
- inlet
- condenser
- air
- casing
- 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
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 32
- 238000001035 drying Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
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
-
- 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, particularly a laundry dryer, having a condenser and an improved condenser cooling system.
- laundry dryer machines comprising a rotary drum adapted to receive the laundry to be dried, means for heating the drying air and a condenser for removing the moisture contained in the drying air at the exit of the rotary drum. These parts are arranged within an outer casing of the household appliance.
- the machine also comprises a special fan for successively circulating the drying air through the drum, the condenser and the heating means (typically an electrical resistor).
- a special fan for successively circulating the drying air through the drum, the condenser and the heating means (typically an electrical resistor).
- a second fan is also provided for feeding cooling air through the condenser.
- the cooling air is typically caused to flow into the laundry dryer through an opening of a side wall of the appliance casing.
- the condenser cooling might not be enough to ensure a satisfactory and effective dehumidification action on the air flow that comes out of the drum. This may affect the results of the whole drying cycle, leaving the laundry still partially wet at the end of the treatment.
- the object of the present invention is to provide a household appliance, particularly a laundry dryer, wherein the condenser can ensure a satisfactory condensing action on a wet air flow, even with a relatively high room temperature.
- a further object is to provide a household appliance that has a simple, inexpensive and compact structure.
- a household appliance comprising:
- the figures show a laundry dryer 11 having an outer casing 12, with a rotary drum 13, a condenser 15 and heating means 14 arranged therein.
- the rotary drum 13 has a cavity for receiving the laundry to be dried, and is rotated, during operation, by known motor means.
- Condenser 15 has, in use, the task of removing moisture from the drying air that comes out of the drum 13 and may be formed as is known per se in the art.
- the condenser 15 may include tube bundles designed to carry wet air and be impinged upon by the cooling air flow.
- the laundry dryer also comprises first conveying means 16 for successively circulating the drying air through the rotary drum 13, the condenser 15 and the heating means 14.
- the first conveying means 16 are preferably made of a fan placed downstream from the condenser 15 and upstream from the heating means 14.
- a drying air filter 26 is placed downstream from the drum 13 and upstream from the condenser 15.
- a tank 30 is also placed downstream from the condenser 13 for collecting condensed water, the latter being then pumped by the pump 31 into a container 32 located at the front opening of the household appliance. By opening the window 25 that closes the front opening, the container 32 may be removed from the household appliance and emptied of condensed water and being able to access the drying cavity of the drum 13.
- the household appliance 11 also comprises second conveying means 17, 28, 29, 33 for causing the cooling air 19 to flow through the condenser 15.
- the wet air flow 24 that comes out of the drum 13 flows through the condenser 15 in a first direction and the cooling air flow 19 flows through it in a second direction.
- the direction of the cooling air flow through the condenser 15 is transverse to the direction of the wet air flow 24.
- the second conveying means include a fan 17.
- the fan 17 is preferably placed downstream from the condenser 15, with respect to the direction of the cooling air flow 19.
- the second conveying means are adapted to draw the cooling air 19 from outside the casing 12.
- the second conveying means are adapted to draw the cooling air from outside the casing 12 through an inlet 18 that faces towards the floor 20 on which the household appliance 11 lies in its operating position.
- operating position is intended to indicate the normal position that the household appliance 11 takes when it performs its primary task (for instance, in the case of a laundry dryer, the task of drying laundry).
- This particular novel position of the cooling air inlet 18 affords a more efficient cooling action in the condenser 15.
- air is normally colder near the floor of a room, and warmer at higher levels.
- air is forced to flow over the floor (which is normally colder than air) before entering the condenser.
- This allows the cooling air to be on average colder than the air in the room where the household appliance is located. Therefore, even when ambient temperature is relatively warm, the laundry dryer may ensure a satisfactory cooling action on the wet air that flows through the condenser 15. This affords a more effective condensation effect, and a generally more effective laundry drying cycle.
- the inlet 18 faces towards the floor, with its axis so oriented as to cross the floor 20.
- the axis of the inlet 18 is inclined at an angle of less than 45° to a line orthogonal to the floor; in a particularly preferred embodiment, as shown in the figures, the axis of the inlet 18 is substantially orthogonal to the floor 20, in the operating position of the household appliance.
- the inlet 18 is made of an inlet opening formed in the bottom wall 22 of the casing 12 of the laundry dryer 11.
- the inlet 18 is advantageously located in the proximity of a side wall 21 of the casing.
- the inlet 18 has an elongate shape (as clearly shown in Figure 3 ) and extends along a side edge of the bottom wall 22 of the casing.
- This configuration provides satisfactory flow and distribution of air into the condenser, without requiring any special size or high-power fan 17.
- the inlet 18 is at 0.5 cm to 5 cm from the floor, with the household appliance in its operating position, due to the provision of support means 23 that keep the household appliance 11 (and the inlet 18) at a desired height. This both provides an improved cooling effect and ensures a sufficient flow into the condenser.
- the width of the inlet 18 (i.e. the smaller size of the inlet 18) as shown in Figure 2 , is greater than the distance of the inlet 18 from the floor 20, with the household appliance 11 in its operating position.
- the second conveying means also include a conduit 29 that carries the cooling air from the inlet 18 to the condenser 15, and a conduit 33 that carries the cooling air from the condenser 15 to the fan 17.
- a conduit 28 is also provided for carrying the cooling air from the fan 17 to the outlet 27.
- the outlet 27 is made of an opening formed in the front wall of the casing 11.
- the outlet is located at a distance equal to at least half the width of the household appliance. This avoids any air recirculation below the appliance, and prevents the air that comes out of the outlet 27, and heated in the condenser, from being sucked back into the inlet 18.
- the cold circuit system should be advantageously in line with the motor and the circuit should be under vacuum. This ensures a more uniform flow through the condenser, as compared with e.g. the uniformity obtained under pressure, and ensures lower parasitic flow distortions. Furthermore, this circuit under vacuum promotes and enhances the local temperature of the ventilation system within the movable casing.
- the invention provides a household appliance having a condenser and an effective condenser cooling system.
- the position of the cooling air inlet actually ensures satisfactory condenser cooling, even when the surrounding environment is relatively warm. This allows an effective drying cycle relatively independently of environmental conditions.
- the household appliance is inexpensive and compact, and sufficient air flows may be obtained for proper operation of the condenser.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
Description
- The present invention relates to a household appliance, particularly a laundry dryer, having a condenser and an improved condenser cooling system.
- It is known in the art to provide laundry dryer machines comprising a rotary drum adapted to receive the laundry to be dried, means for heating the drying air and a condenser for removing the moisture contained in the drying air at the exit of the rotary drum. These parts are arranged within an outer casing of the household appliance.
- The machine also comprises a special fan for successively circulating the drying air through the drum, the condenser and the heating means (typically an electrical resistor).
- A second fan is also provided for feeding cooling air through the condenser. The cooling air is typically caused to flow into the laundry dryer through an opening of a side wall of the appliance casing.
- If the environment that surrounds the household appliance is relatively warm, the condenser cooling might not be enough to ensure a satisfactory and effective dehumidification action on the air flow that comes out of the drum. This may affect the results of the whole drying cycle, leaving the laundry still partially wet at the end of the treatment.
- In view of the above state of the art, the object of the present invention is to provide a household appliance, particularly a laundry dryer, wherein the condenser can ensure a satisfactory condensing action on a wet air flow, even with a relatively high room temperature.
- A further object is to provide a household appliance that has a simple, inexpensive and compact structure.
- According to the present invention, this object is fulfilled by a household appliance comprising:
- a casing that houses a condenser for removing water from a wet air flow,
- first conveying means for causing wet air to flow through the condenser, and
- second conveying means for causing cooling air to flow through the condenser to cool said wet air,
- The characteristics and advantages of the present invention will appear from the following detailed description of one practical embodiment, which is given as a non limiting example with reference to the annexed drawings, in which:
-
Figure 1 is a perspective view of a household appliance of the invention, with certain parts being omitted for a clearer vision of the internal components of the appliance, -
Figure 2 is an elevational cross sectional view of the condenser and its cooling system, -
Figure 3 is a plan view of the condenser and its cooling system. - The figures show a
laundry dryer 11 having anouter casing 12, with arotary drum 13, acondenser 15 and heating means 14 arranged therein. - The
rotary drum 13 has a cavity for receiving the laundry to be dried, and is rotated, during operation, by known motor means. - The heating means 14, preferably consisting of an electrical resistor, have the task of heating the drying
air 24 circulating in the household appliance. -
Condenser 15 has, in use, the task of removing moisture from the drying air that comes out of thedrum 13 and may be formed as is known per se in the art. For instance, thecondenser 15 may include tube bundles designed to carry wet air and be impinged upon by the cooling air flow. - The laundry dryer also comprises first conveying
means 16 for successively circulating the drying air through therotary drum 13, thecondenser 15 and the heating means 14. - The first conveying
means 16 are preferably made of a fan placed downstream from thecondenser 15 and upstream from the heating means 14. - Preferably, a drying
air filter 26 is placed downstream from thedrum 13 and upstream from thecondenser 15. - A
tank 30 is also placed downstream from thecondenser 13 for collecting condensed water, the latter being then pumped by thepump 31 into acontainer 32 located at the front opening of the household appliance. By opening thewindow 25 that closes the front opening, thecontainer 32 may be removed from the household appliance and emptied of condensed water and being able to access the drying cavity of thedrum 13. - The
household appliance 11 also comprises second conveyingmeans air 19 to flow through thecondenser 15. - The
wet air flow 24 that comes out of thedrum 13 flows through thecondenser 15 in a first direction and the coolingair flow 19 flows through it in a second direction. Preferably, the direction of the cooling air flow through thecondenser 15 is transverse to the direction of thewet air flow 24. - The second conveying means include a
fan 17. Thefan 17 is preferably placed downstream from thecondenser 15, with respect to the direction of thecooling air flow 19. - The second conveying means are adapted to draw the
cooling air 19 from outside thecasing 12. - Particularly, according to the invention, the second conveying means are adapted to draw the cooling air from outside the
casing 12 through aninlet 18 that faces towards thefloor 20 on which thehousehold appliance 11 lies in its operating position. - As used herein, the term "operating position" is intended to indicate the normal position that the
household appliance 11 takes when it performs its primary task (for instance, in the case of a laundry dryer, the task of drying laundry). - This particular novel position of the
cooling air inlet 18 affords a more efficient cooling action in thecondenser 15. In fact, air is normally colder near the floor of a room, and warmer at higher levels. Furthermore, air is forced to flow over the floor (which is normally colder than air) before entering the condenser. This allows the cooling air to be on average colder than the air in the room where the household appliance is located. Therefore, even when ambient temperature is relatively warm, the laundry dryer may ensure a satisfactory cooling action on the wet air that flows through thecondenser 15. This affords a more effective condensation effect, and a generally more effective laundry drying cycle. - The
inlet 18 faces towards the floor, with its axis so oriented as to cross thefloor 20. Preferably, in the operating condition, the axis of theinlet 18 is inclined at an angle of less than 45° to a line orthogonal to the floor; in a particularly preferred embodiment, as shown in the figures, the axis of theinlet 18 is substantially orthogonal to thefloor 20, in the operating position of the household appliance. - Preferably, the
inlet 18 is made of an inlet opening formed in thebottom wall 22 of thecasing 12 of thelaundry dryer 11. - The
inlet 18 is advantageously located in the proximity of aside wall 21 of the casing. - Preferably, the
inlet 18 has an elongate shape (as clearly shown inFigure 3 ) and extends along a side edge of thebottom wall 22 of the casing. This configuration provides satisfactory flow and distribution of air into the condenser, without requiring any special size or high-power fan 17. - Preferably, the
inlet 18 is at 0.5 cm to 5 cm from the floor, with the household appliance in its operating position, due to the provision of support means 23 that keep the household appliance 11 (and the inlet 18) at a desired height. This both provides an improved cooling effect and ensures a sufficient flow into the condenser. - Preferably, the width of the inlet 18 (i.e. the smaller size of the inlet 18) as shown in
Figure 2 , is greater than the distance of theinlet 18 from thefloor 20, with thehousehold appliance 11 in its operating position. - The second conveying means also include a conduit 29 that carries the cooling air from the
inlet 18 to thecondenser 15, and aconduit 33 that carries the cooling air from thecondenser 15 to thefan 17. Aconduit 28 is also provided for carrying the cooling air from thefan 17 to theoutlet 27. - In one embodiment, the
outlet 27 is made of an opening formed in the front wall of thecasing 11. Preferably, in this case, the outlet is located at a distance equal to at least half the width of the household appliance. This avoids any air recirculation below the appliance, and prevents the air that comes out of theoutlet 27, and heated in the condenser, from being sucked back into theinlet 18. - The cold circuit system should be advantageously in line with the motor and the circuit should be under vacuum. This ensures a more uniform flow through the condenser, as compared with e.g. the uniformity obtained under pressure, and ensures lower parasitic flow distortions. Furthermore, this circuit under vacuum promotes and enhances the local temperature of the ventilation system within the movable casing.
- The above clearly shows that the objects of the present invention have been fulfilled.
- Particularly, the invention provides a household appliance having a condenser and an effective condenser cooling system. The position of the cooling air inlet actually ensures satisfactory condenser cooling, even when the surrounding environment is relatively warm. This allows an effective drying cycle relatively independently of environmental conditions.
- Furthermore, due to the particular shape and position of the inlet, the household appliance is inexpensive and compact, and sufficient air flows may be obtained for proper operation of the condenser.
- Those skilled in the art will obviously appreciate that a number of changes and variants may be made to the arrangements as described hereinbefore to meet incidental and specific needs, without departure from the scope of the invention, as defined in the following claims.
Claims (10)
- A household appliance comprising:- a casing (12) that houses a condenser (15) for removing water from a wet air flow,- first conveying means (16) for causing wet air to flow through the condenser (15), and- second conveying means (17, 28, 29, 33) for causing cooling air (19) to flow through the condenser (15) and cool said wet air,said second conveying means (17, 28, 29, 33) being adapted to draw the cooling air (19) from outside the casing (12) through an air inlet (18), characterized in that said inlet (18) is in a position in which it faces towards a floor (20) on which the household appliance (11) lies in its operating position.
- A household appliance as claimed in claim 1, characterized in that said inlet (18) is formed at an opening of a bottom wall (22) of the casing.
- A household appliance as claimed in any of the preceding claims, characterized in that the inlet (18) is in the proximity of a side wall (21) of the casing.
- A household appliance as claimed in one or more of the preceding claims, characterized in that the inlet (18) has a narrow elongate shape and extends along a side edge of said bottom wall (22).
- A household appliance as claimed in one or more of the preceding claims, characterized in that it has an outlet (27) through which, in use, cooling air is ejected from the appliance after flowing through the condenser (15), said outlet (27) consisting of an opening on a side wall or on said bottom wall (22) of the casing of the household appliance.
- A household appliance as claimed in one or more of the preceding claims, characterized in that the outlet (27) is at a distance from the inlet (18) equal to at least half the width of the casing (12) of the household appliance.
- A household appliance as claimed in one or more of the preceding claims, characterized in that it has support means (23) for keeping, in use, said inlet (18) at 0.5 cm to 5 cm from the floor (20).
- A household appliance as claimed in one or more of the preceding claims, characterized in that the axis of the inlet (18) is substantially orthogonal to the floor (20), when the household appliance is in the operating position.
- A household appliance as claimed in one or more of the preceding claims, characterized in that the smallest width of the inlet (18) is greater than the distance of the inlet (18) from the floor (20), when the household appliance is in its operating position.
- A household appliance as claimed in one or more of the preceding claims, characterized in that it is a laundry dryer comprising a rotary drum (13) for receiving the laundry to be dried and heating means (14) for heating a drying air, wherein said first conveying means are adapted to successively circulate the drying air through the drum (13), the condenser (15) and the heating means (14).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL09425411T PL2314757T3 (en) | 2009-10-20 | 2009-10-20 | Household appliance with improved condenser cooling system |
EP20090425411 EP2314757B1 (en) | 2009-10-20 | 2009-10-20 | Household appliance with improved condenser cooling system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20090425411 EP2314757B1 (en) | 2009-10-20 | 2009-10-20 | Household appliance with improved condenser cooling system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2314757A1 true EP2314757A1 (en) | 2011-04-27 |
EP2314757B1 EP2314757B1 (en) | 2015-04-22 |
Family
ID=42062607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20090425411 Not-in-force EP2314757B1 (en) | 2009-10-20 | 2009-10-20 | Household appliance with improved condenser cooling system |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2314757B1 (en) |
PL (1) | PL2314757T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPR20120053A1 (en) * | 2012-08-09 | 2014-02-10 | Indesit Co Spa | APPLIANCES FOR DRYING OF ARTICLES AND FUNCTIONING METHOD |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54106960A (en) | 1978-02-08 | 1979-08-22 | Hitachi Ltd | Clothes drier |
EP0434169A2 (en) | 1989-12-22 | 1991-06-26 | OCEAN S.p.A. | Manufacturing method and improved rotary drum clothes |
EP1961853A1 (en) * | 2005-11-17 | 2008-08-27 | Kabushiki Kaisha Toshiba | Clothes dryer |
US20090064530A1 (en) | 2007-08-03 | 2009-03-12 | Lg Electronics Inc. | Clothes treatment apparatus |
DE102008006349A1 (en) * | 2008-01-28 | 2009-07-30 | BSH Bosch und Siemens Hausgeräte GmbH | Condensation dryer with condensate pan and container and method for its operation |
DE102008006347A1 (en) | 2008-01-28 | 2009-07-30 | BSH Bosch und Siemens Hausgeräte GmbH | Condensation dryer and method for its operation |
DE102008010519A1 (en) * | 2008-02-22 | 2009-09-03 | BSH Bosch und Siemens Hausgeräte GmbH | Dryer with cooled engine |
-
2009
- 2009-10-20 EP EP20090425411 patent/EP2314757B1/en not_active Not-in-force
- 2009-10-20 PL PL09425411T patent/PL2314757T3/en unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54106960A (en) | 1978-02-08 | 1979-08-22 | Hitachi Ltd | Clothes drier |
EP0434169A2 (en) | 1989-12-22 | 1991-06-26 | OCEAN S.p.A. | Manufacturing method and improved rotary drum clothes |
EP1961853A1 (en) * | 2005-11-17 | 2008-08-27 | Kabushiki Kaisha Toshiba | Clothes dryer |
US20090064530A1 (en) | 2007-08-03 | 2009-03-12 | Lg Electronics Inc. | Clothes treatment apparatus |
DE102008006349A1 (en) * | 2008-01-28 | 2009-07-30 | BSH Bosch und Siemens Hausgeräte GmbH | Condensation dryer with condensate pan and container and method for its operation |
DE102008006347A1 (en) | 2008-01-28 | 2009-07-30 | BSH Bosch und Siemens Hausgeräte GmbH | Condensation dryer and method for its operation |
DE102008010519A1 (en) * | 2008-02-22 | 2009-09-03 | BSH Bosch und Siemens Hausgeräte GmbH | Dryer with cooled engine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPR20120053A1 (en) * | 2012-08-09 | 2014-02-10 | Indesit Co Spa | APPLIANCES FOR DRYING OF ARTICLES AND FUNCTIONING METHOD |
EP2695988A1 (en) * | 2012-08-09 | 2014-02-12 | Indesit Company S.p.A. | Household electrical appliance for drying items and operating method |
Also Published As
Publication number | Publication date |
---|---|
PL2314757T3 (en) | 2015-10-30 |
EP2314757B1 (en) | 2015-04-22 |
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