GB2087029A - Improvements in or Relating to Heat Exchangers - Google Patents

Improvements in or Relating to Heat Exchangers Download PDF

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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
spray
water
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Withdrawn
Application number
GB8030376A
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.)
HEAT PUMPS W R Ltd
Original Assignee
HEAT PUMPS W R Ltd
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.)
Filing date
Publication date
Application filed by HEAT PUMPS W R Ltd filed Critical HEAT PUMPS W R Ltd
Priority to GB8030376A priority Critical patent/GB2087029A/en
Publication of GB2087029A publication Critical patent/GB2087029A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D3/00Heat-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
    • F28D3/02Heat-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
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/20General details of domestic laundry dryers 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/20General details of domestic laundry dryers 
    • D06F58/22Lint collecting arrangements

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)

  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 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.
GB8030376A 1980-09-19 1980-09-19 Improvements in or Relating to Heat Exchangers Withdrawn GB2087029A (en)

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 (25)

* Cited by examiner, † Cited by third party
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

Cited By (42)

* Cited by examiner, † Cited by third party
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
WO2007093461A1 (en) * 2006-02-17 2007-08-23 BSH Bosch und Siemens Hausgeräte 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
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
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
EP2691567A4 (en) * 2011-03-29 2015-08-05 Lg Electronics Inc Clothes treating apparatus having 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
CN103334254B (en) * 2012-02-06 2016-11-30 Lg电子株式会社 Washing machine and control method thereof
US9644306B2 (en) 2012-02-06 2017-05-09 Lg Electronics Inc. Control method of laundry machine
US9085843B2 (en) 2012-02-06 2015-07-21 Lg Electronics Inc. Control method of laundry machine
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
US9328448B2 (en) 2012-02-06 2016-05-03 Lg Electronics Inc. Laundry machine with drying duct comprising a nozzle
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
CN103334254A (en) * 2012-02-06 2013-10-02 Lg电子株式会社 Laundry machine and control method thereof
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
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
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
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
US10738411B2 (en) 2016-10-14 2020-08-11 Whirlpool Corporation Filterless air-handling system for a heat pump laundry appliance
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
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
US10823479B2 (en) 2017-06-01 2020-11-03 Whirlpool Corporation Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators
US10514194B2 (en) 2017-06-01 2019-12-24 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

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)