GB2087029A - Improvements in or Relating to Heat Exchangers - Google Patents
Improvements in or Relating to Heat Exchangers Download PDFInfo
- Publication number
- GB2087029A GB2087029A GB8030376A GB8030376A GB2087029A GB 2087029 A GB2087029 A GB 2087029A GB 8030376 A GB8030376 A GB 8030376A GB 8030376 A GB8030376 A GB 8030376A GB 2087029 A GB2087029 A GB 2087029A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heat exchanger
- water
- spray
- heat
- air
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
- F28D3/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits with tubular conduits
-
- 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
- D06F58/22—Lint collecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The invention provides a waste heat (for air from tumble dryers), recovery heat exchanger 10 having nozzles 16 and 17 to wash it intermittently with water to remove e.g. accumulated lint or dirt. Nozzle 16 is directed with the air flow 14 and covers the whole area of cross-section; nozzle 17 is directed downwards to traverse the air stream 14. Electrically-operated valves control water supply to the nozzle 16, 17 according to a cycle. <IMAGE>
Description
SPECIFICATION
Improvements In or Relating to Heat
Exchangers
This invention relates to heat exchangers and in particular to waste heat recovery heat exchangers.
In laundrys or laundrettes it is common to use so called tumble dryers for drying washed clothing or other material with hot air. The hot air carrying the moisture from the clothes or other material with it is usually vented to the atmosphere and the heat content of it is thus lost.
Attempts have been made to recapture this heat by the use of a heat exchanger arranged to preheat water which is to be used in the laundry or laundrette for washing purposes. However, the air leaving a tumble dryer carries with it a considerable amount of lint and other particles from the clothing or other material being dried and this has clogged the waste heat recovery heat exchangers making the inefficient and inconvenient to use.
It is the object of the present invention to provide a waste heat recovery exchanger which alleviates this problem.
Accordingly the present invention provides a waste heat recovery heat exchanger provided with means to wash it intermittently with water to remove any contamination from it.
Preferably such means for washing the heat exchanger comprises a water jet spray system arranged to cover the cross-section of the heat exchanger which is transverse to the air flow passing through it.
Preferably such means for washing the heat exchanger further includes a water jet spray directed through the heat exchanger in a direction transverse to the air flow passing through it.
In order to promote a further understanding of the above and other aspects of the present invention an embodiment will now be described by way of example only with reference to the accompanying drawing which shows in schematic cross-section a waste heat recovery heat exchanger.
The drawing shows a heat exchanger 10 which comprises a plurality of tubes 11 arranged in closely spaced fins 12 in conventional manner per se. The haat exchanger 10 is arranged in a duct 13 through which air from tumble dryers passes in the direction of arrow 14, being driven by a motorised fan device 15. The air thus passes between the fins 12 over the tubes 1 1. Means is provided to circulate water through the tubes 11 thus to take-up heat from the air and pre-heat the water.
A spray nozzle 16 is arranged in the duct 13 upstream of the heat a; chanser 10 and is supplied with water under pressure to direct a spray of water over the entire area of the heat exchanger 10. The spray 1 6 is arranged so that the spray pattern corresponds to the crosssection at the heat exchanger 10 and in this embodiment is square, although of course it may be round or of other shape.
A second spray device 17 is provided above the heat exchanger 10 to direct a spray of water downwards through the heat exchanger in a direction transverse to the air flow. Means 1 8 is provided at the bottom of the heat exchanger to collect the water from the two spray arrangements and carry the water away to a filter arrangement arranged to retrieve any material washed out of the heat exchanger. Suitable electrically operates valves are provided to control the supply of water to the spray arrangement 1 6 and 1 7, and preferably such valves are operated automatically at set intervals of time so that the heat exchanger is washed cyclically.
Thus it can be seen that the spray 16 provides means to dislodge any lint or other foreign matter building up on the front of the heat exchanger or further into it, while the spray 17 deflects the thus dislodged material downwards and carries it out through the means 18.
By this means it is possible to retrieve the waste heafe Prsm the hot air leaving such items as tumble dryers economically and reliably Claims (Filed on 21/8/81) 1. A waste heat recovery heat exchanger having means arranged to wash it intermittently with water to remove contamination or accummulated dirt from it.
2. A heat exchanger as claimed in Claim 1 in which said washing means comprises a water jet spray system arranged to cover the cross-section of the heat exchanger transverse to the intended air flow through it.
3. A heat exchanger as claimed in Claim 2, in which said washing means further includes a water jet spray system directed through the heat exchanger in a direction transverse to the intended air flow through it
4. A heat exchanger as claimed in Claim 2 or 3 in which the first water spray system is arranged to provide a spray pattern corresponding to the cross section of the heat exchanger.
6. A heat exchanger as claimed in any one of
Claims 2, 3 or 4 in which said water jet spray systems are operated automatically at set intervals a time.
6. A heat exchanger substantially as herein described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (1)
- **WARNING** start of CLMS field may overlap end of DESC **.SPECIFICATION Improvements In or Relating to Heat Exchangers This invention relates to heat exchangers and in particular to waste heat recovery heat exchangers.In laundrys or laundrettes it is common to use so called tumble dryers for drying washed clothing or other material with hot air. The hot air carrying the moisture from the clothes or other material with it is usually vented to the atmosphere and the heat content of it is thus lost.Attempts have been made to recapture this heat by the use of a heat exchanger arranged to preheat water which is to be used in the laundry or laundrette for washing purposes. However, the air leaving a tumble dryer carries with it a considerable amount of lint and other particles from the clothing or other material being dried and this has clogged the waste heat recovery heat exchangers making the inefficient and inconvenient to use.It is the object of the present invention to provide a waste heat recovery exchanger which alleviates this problem.Accordingly the present invention provides a waste heat recovery heat exchanger provided with means to wash it intermittently with water to remove any contamination from it.Preferably such means for washing the heat exchanger comprises a water jet spray system arranged to cover the cross-section of the heat exchanger which is transverse to the air flow passing through it.Preferably such means for washing the heat exchanger further includes a water jet spray directed through the heat exchanger in a direction transverse to the air flow passing through it.In order to promote a further understanding of the above and other aspects of the present invention an embodiment will now be described by way of example only with reference to the accompanying drawing which shows in schematic cross-section a waste heat recovery heat exchanger.The drawing shows a heat exchanger 10 which comprises a plurality of tubes 11 arranged in closely spaced fins 12 in conventional manner per se. The haat exchanger 10 is arranged in a duct 13 through which air from tumble dryers passes in the direction of arrow 14, being driven by a motorised fan device 15. The air thus passes between the fins 12 over the tubes 1 1. Means is provided to circulate water through the tubes 11 thus to take-up heat from the air and pre-heat the water.A spray nozzle 16 is arranged in the duct 13 upstream of the heat a; chanser 10 and is supplied with water under pressure to direct a spray of water over the entire area of the heat exchanger 10. The spray 1 6 is arranged so that the spray pattern corresponds to the crosssection at the heat exchanger 10 and in this embodiment is square, although of course it may be round or of other shape.A second spray device 17 is provided above the heat exchanger 10 to direct a spray of water downwards through the heat exchanger in a direction transverse to the air flow. Means 1 8 is provided at the bottom of the heat exchanger to collect the water from the two spray arrangements and carry the water away to a filter arrangement arranged to retrieve any material washed out of the heat exchanger. Suitable electrically operates valves are provided to control the supply of water to the spray arrangement 1 6 and 1 7, and preferably such valves are operated automatically at set intervals of time so that the heat exchanger is washed cyclically.Thus it can be seen that the spray 16 provides means to dislodge any lint or other foreign matter building up on the front of the heat exchanger or further into it, while the spray 17 deflects the thus dislodged material downwards and carries it out through the means 18.By this means it is possible to retrieve the waste heafe Prsm the hot air leaving such items as tumble dryers economically and reliably Claims (Filed on 21/8/81)1. A waste heat recovery heat exchanger having means arranged to wash it intermittently with water to remove contamination or accummulated dirt from it.2. A heat exchanger as claimed in Claim 1 in which said washing means comprises a water jet spray system arranged to cover the cross-section of the heat exchanger transverse to the intended air flow through it.3. A heat exchanger as claimed in Claim 2, in which said washing means further includes a water jet spray system directed through the heat exchanger in a direction transverse to the intended air flow through it4. A heat exchanger as claimed in Claim 2 or 3 in which the first water spray system is arranged to provide a spray pattern corresponding to the cross section of the heat exchanger.6. A heat exchanger as claimed in any one of Claims 2, 3 or 4 in which said water jet spray systems are operated automatically at set intervals a time.6. A heat exchanger substantially as herein described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8030376A GB2087029A (en) | 1980-09-19 | 1980-09-19 | Improvements in or Relating to Heat Exchangers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8030376A GB2087029A (en) | 1980-09-19 | 1980-09-19 | Improvements in or Relating to Heat Exchangers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2087029A true GB2087029A (en) | 1982-05-19 |
Family
ID=10516174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8030376A Withdrawn GB2087029A (en) | 1980-09-19 | 1980-09-19 | Improvements in or Relating to Heat Exchangers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2087029A (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0468573A1 (en) * | 1990-07-24 | 1992-01-29 | Whirlpool Europe B.V. | Device for cleaning an evaporator, in particular of lint in a clothes dryer |
| EP0648885A1 (en) * | 1993-10-15 | 1995-04-19 | Esswein S.A. | Device for cleaning the filter of a machine's drying system |
| WO1998003832A1 (en) * | 1996-07-22 | 1998-01-29 | Integral Energietechnik Gmbh | Method of cooling contaminated fluids |
| US5924478A (en) * | 1997-05-08 | 1999-07-20 | Caterpillar Inc. | Radiator washing system and method |
| DE19812091A1 (en) * | 1998-03-19 | 2000-01-20 | Eberhard Stenz | Equipment for cleaning space heating radiators, recirculates washing fluid via a suction pump and a spray pump |
| CN1322287C (en) * | 2004-11-29 | 2007-06-20 | 王继柱 | Domestic sewage extracting and flushing process in sewage hot pump thermal supplying air conditioner system |
| WO2007093461A1 (en) * | 2006-02-17 | 2007-08-23 | BSH Bosch und Siemens Hausgeräte GmbH | Cleaning apparatus for a component of a household tumble dryer |
| FR2911180A1 (en) * | 2007-01-04 | 2008-07-11 | Pierre Brun | Hot and humid air treating device for e.g. commercial laundry drier, has air/air heat exchanger and air/liquid exchanger that are placed in series for reheating air from air/liquid exchanger and/or external air with air to be treated |
| US20090031513A1 (en) * | 2006-02-17 | 2009-02-05 | BSH Bosch und Siemens Hausgeräte GmbH | Cleaning Device for a Component Within a Process Air Circuit of a Household Tumble-Dryer |
| EP2072661A1 (en) * | 2007-12-21 | 2009-06-24 | BSH Bosch und Siemens Hausgeräte GmbH | Laundry drying device with a solenoid |
| EP2157231A1 (en) * | 2008-08-22 | 2010-02-24 | BSH Bosch und Siemens Hausgeräte GmbH | Domestic tumble drier and method for cleaning a component, in particular an evaporator of an evaporator device for such a drier |
| US20120246960A1 (en) * | 2011-03-29 | 2012-10-04 | Lee Junseok | Clothes treating apparatus having heat exchanger cleaning device |
| EP2636785A1 (en) * | 2012-02-06 | 2013-09-11 | LG Electronics, Inc. | Laundry machine comprising a nozzle and a heater arranged in a drying duct and control method hereof |
| DE102014201280A1 (en) * | 2014-01-24 | 2015-07-30 | Gebrüder Lödige Maschinenbau GmbH | Refrigeration system with an air-cooled heat exchanger |
| CN105625007A (en) * | 2014-12-01 | 2016-06-01 | 青岛海尔洗衣机有限公司 | Lint cleaning device and method for clothes dryer evaporator |
| CN103334254B (en) * | 2012-02-06 | 2016-11-30 | Lg电子株式会社 | Washing machine and control method thereof |
| US10087569B2 (en) | 2016-08-10 | 2018-10-02 | Whirlpool Corporation | Maintenance free dryer having multiple self-cleaning lint filters |
| US10161665B2 (en) | 2013-03-14 | 2018-12-25 | Whirlpool Corporation | Refrigerator cooling system having secondary cooling loop |
| US20180371681A1 (en) * | 2015-12-15 | 2018-12-27 | Qingdao Haier Drum Washing Machine Co., Ltd. | Washer-dryer and control method |
| US10502478B2 (en) | 2016-12-20 | 2019-12-10 | Whirlpool Corporation | Heat rejection system for a condenser of a refrigerant loop within an appliance |
| US10514194B2 (en) | 2017-06-01 | 2019-12-24 | Whirlpool Corporation | Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators |
| US10519591B2 (en) | 2016-10-14 | 2019-12-31 | Whirlpool Corporation | Combination washing/drying laundry appliance having a heat pump system with reversible condensing and evaporating heat exchangers |
| US10544539B2 (en) | 2017-02-27 | 2020-01-28 | Whirlpool Corporation | Heat exchanger filter for self lint cleaning system in dryer appliance |
| US10718082B2 (en) | 2017-08-11 | 2020-07-21 | Whirlpool Corporation | Acoustic heat exchanger treatment for a laundry appliance having a heat pump system |
| US10738411B2 (en) | 2016-10-14 | 2020-08-11 | Whirlpool Corporation | Filterless air-handling system for a heat pump laundry appliance |
| US11015281B2 (en) | 2017-09-26 | 2021-05-25 | Whirlpool Corporation | Laundry appliance having a maintenance free lint removal system |
-
1980
- 1980-09-19 GB GB8030376A patent/GB2087029A/en not_active Withdrawn
Cited By (49)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0468573A1 (en) * | 1990-07-24 | 1992-01-29 | Whirlpool Europe B.V. | Device for cleaning an evaporator, in particular of lint in a clothes dryer |
| EP0648885A1 (en) * | 1993-10-15 | 1995-04-19 | Esswein S.A. | Device for cleaning the filter of a machine's drying system |
| FR2711073A1 (en) * | 1993-10-15 | 1995-04-21 | Esswein Sa | Cleaning device for filter of the drying circuit by hot air flow of a machine, in particular for a washer-dryer machine or for a dryer. |
| WO1998003832A1 (en) * | 1996-07-22 | 1998-01-29 | Integral Energietechnik Gmbh | Method of cooling contaminated fluids |
| US5924478A (en) * | 1997-05-08 | 1999-07-20 | Caterpillar Inc. | Radiator washing system and method |
| DE19812091A1 (en) * | 1998-03-19 | 2000-01-20 | Eberhard Stenz | Equipment for cleaning space heating radiators, recirculates washing fluid via a suction pump and a spray pump |
| CN1322287C (en) * | 2004-11-29 | 2007-06-20 | 王继柱 | Domestic sewage extracting and flushing process in sewage hot pump thermal supplying air conditioner system |
| US8245347B2 (en) | 2006-02-17 | 2012-08-21 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Cleaning apparatus for a component of a household tumble dryer |
| US20090031513A1 (en) * | 2006-02-17 | 2009-02-05 | BSH Bosch und Siemens Hausgeräte GmbH | Cleaning Device for a Component Within a Process Air Circuit of a Household Tumble-Dryer |
| WO2007093461A1 (en) * | 2006-02-17 | 2007-08-23 | BSH Bosch und Siemens Hausgeräte GmbH | Cleaning apparatus for a component of a household tumble dryer |
| US8266815B2 (en) * | 2006-02-17 | 2012-09-18 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Cleaning device for a component within a process air circuit of a household tumble-dryer |
| FR2911180A1 (en) * | 2007-01-04 | 2008-07-11 | Pierre Brun | Hot and humid air treating device for e.g. commercial laundry drier, has air/air heat exchanger and air/liquid exchanger that are placed in series for reheating air from air/liquid exchanger and/or external air with air to be treated |
| EP2072661A1 (en) * | 2007-12-21 | 2009-06-24 | BSH Bosch und Siemens Hausgeräte GmbH | Laundry drying device with a solenoid |
| EP2157231A1 (en) * | 2008-08-22 | 2010-02-24 | BSH Bosch und Siemens Hausgeräte GmbH | Domestic tumble drier and method for cleaning a component, in particular an evaporator of an evaporator device for such a drier |
| US20120246960A1 (en) * | 2011-03-29 | 2012-10-04 | Lee Junseok | Clothes treating apparatus having heat exchanger cleaning device |
| EP2691567A4 (en) * | 2011-03-29 | 2015-08-05 | Lg Electronics Inc | Clothes treating apparatus having heat exchanger cleaning device |
| CN103547728B (en) * | 2011-03-29 | 2016-03-23 | Lg电子株式会社 | There is the device for clothing processing of heat exchanger cleaning device |
| CN103547728A (en) * | 2011-03-29 | 2014-01-29 | Lg电子株式会社 | Clothes treating apparatus having heat exchanger cleaning device |
| US8857071B2 (en) * | 2011-03-29 | 2014-10-14 | Lg Electronics Inc. | Clothes treating apparatus having heat exchanger cleaning device |
| AU2012237107B2 (en) * | 2011-03-29 | 2015-09-17 | Lg Electronics Inc. | Laundry Machine |
| US9328448B2 (en) | 2012-02-06 | 2016-05-03 | Lg Electronics Inc. | Laundry machine with drying duct comprising a nozzle |
| CN103334254B (en) * | 2012-02-06 | 2016-11-30 | Lg电子株式会社 | Washing machine and control method thereof |
| US9085843B2 (en) | 2012-02-06 | 2015-07-21 | Lg Electronics Inc. | Control method of laundry machine |
| CN103334254A (en) * | 2012-02-06 | 2013-10-02 | Lg电子株式会社 | Laundry machine and control method thereof |
| EP2636785A1 (en) * | 2012-02-06 | 2013-09-11 | LG Electronics, Inc. | Laundry machine comprising a nozzle and a heater arranged in a drying duct and control method hereof |
| US9328449B2 (en) | 2012-02-06 | 2016-05-03 | Lg Electronics Inc. | Control method of laundry machine |
| US9334601B2 (en) | 2012-02-06 | 2016-05-10 | Lg Electronics Inc. | Control method of laundry machine |
| US9644306B2 (en) | 2012-02-06 | 2017-05-09 | Lg Electronics Inc. | Control method of laundry machine |
| US10161665B2 (en) | 2013-03-14 | 2018-12-25 | Whirlpool Corporation | Refrigerator cooling system having secondary cooling loop |
| DE102014201280A1 (en) * | 2014-01-24 | 2015-07-30 | Gebrüder Lödige Maschinenbau GmbH | Refrigeration system with an air-cooled heat exchanger |
| CN105625007A (en) * | 2014-12-01 | 2016-06-01 | 青岛海尔洗衣机有限公司 | Lint cleaning device and method for clothes dryer evaporator |
| CN105625007B (en) * | 2014-12-01 | 2019-08-27 | 青岛海尔洗衣机有限公司 | A kind of dryer evaporator trash line clearup device and method for cleaning |
| US20180371681A1 (en) * | 2015-12-15 | 2018-12-27 | Qingdao Haier Drum Washing Machine Co., Ltd. | Washer-dryer and control method |
| US10087569B2 (en) | 2016-08-10 | 2018-10-02 | Whirlpool Corporation | Maintenance free dryer having multiple self-cleaning lint filters |
| US10633785B2 (en) | 2016-08-10 | 2020-04-28 | Whirlpool Corporation | Maintenance free dryer having multiple self-cleaning lint filters |
| US11299834B2 (en) | 2016-10-14 | 2022-04-12 | Whirlpool Corporation | Combination washing/drying laundry appliance having a heat pump system with reversible condensing and evaporating heat exchangers |
| US10519591B2 (en) | 2016-10-14 | 2019-12-31 | Whirlpool Corporation | Combination washing/drying laundry appliance having a heat pump system with reversible condensing and evaporating heat exchangers |
| US10738411B2 (en) | 2016-10-14 | 2020-08-11 | Whirlpool Corporation | Filterless air-handling system for a heat pump laundry appliance |
| US11542653B2 (en) | 2016-10-14 | 2023-01-03 | Whirlpool Corporation | Filterless air-handling system for a heat pump laundry appliance |
| US10502478B2 (en) | 2016-12-20 | 2019-12-10 | Whirlpool Corporation | Heat rejection system for a condenser of a refrigerant loop within an appliance |
| US10544539B2 (en) | 2017-02-27 | 2020-01-28 | Whirlpool Corporation | Heat exchanger filter for self lint cleaning system in dryer appliance |
| US11920288B2 (en) | 2017-02-27 | 2024-03-05 | Whirlpool Corporation | Heat exchanger filter for self lint cleaning system in dryer appliance |
| US11634856B2 (en) | 2017-02-27 | 2023-04-25 | Whirlpool Corporation | Heat exchanger filter for self lint cleaning system in dryer appliance |
| US11142864B2 (en) | 2017-02-27 | 2021-10-12 | Whirlpool Corporation | Heat exchanger filter for self lint cleaning system in dryer appliance |
| US10514194B2 (en) | 2017-06-01 | 2019-12-24 | Whirlpool Corporation | Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators |
| US10823479B2 (en) | 2017-06-01 | 2020-11-03 | Whirlpool Corporation | Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators |
| US10718082B2 (en) | 2017-08-11 | 2020-07-21 | Whirlpool Corporation | Acoustic heat exchanger treatment for a laundry appliance having a heat pump system |
| US11015281B2 (en) | 2017-09-26 | 2021-05-25 | Whirlpool Corporation | Laundry appliance having a maintenance free lint removal system |
| US11739472B2 (en) | 2017-09-26 | 2023-08-29 | Whirlpool Corporation | Laundry appliance having a maintenance free lint removal system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |