EP3282050B1 - Wartungsfreier trockner mit mehreren selbstreinigenden flusenfiltern - Google Patents

Wartungsfreier trockner mit mehreren selbstreinigenden flusenfiltern Download PDF

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Publication number
EP3282050B1
EP3282050B1 EP17184083.8A EP17184083A EP3282050B1 EP 3282050 B1 EP3282050 B1 EP 3282050B1 EP 17184083 A EP17184083 A EP 17184083A EP 3282050 B1 EP3282050 B1 EP 3282050B1
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EP
European Patent Office
Prior art keywords
lint
fluid
filter
angled
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.)
Active
Application number
EP17184083.8A
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English (en)
French (fr)
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EP3282050A1 (de
Inventor
Gianluca Bocchino
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
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
Priority claimed from US15/658,971 external-priority patent/US10633785B2/en
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Publication of EP3282050A1 publication Critical patent/EP3282050A1/de
Application granted granted Critical
Publication of EP3282050B1 publication Critical patent/EP3282050B1/de
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    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the device is in the field of laundry appliances, more specifically, a maintenance free laundry appliance having a plurality of self-cleaning lint filters.
  • Document WO 2015/101387 A1 discloses a laundry treatment apparatus having a first lint filter and a second lint filter downstream of the first lint filter; second lint filter and a washing liquid collector are arranged such that liquid flows along portion of surface of filter and carries fluff washed off from surface into collector.
  • Document EP 2 202 349 A2 discloses a laundry dryer having a filter for filtering fluff in process air channel of dryer, and cleaning device for cleaning filter, where filter is arranged in inclined compartment.
  • a laundry appliance includes a rotating drum for processing laundry.
  • a door is operable within a door opening and that provides selective access to the rotating drum.
  • a blower directs process air through an air path that includes the rotating drum.
  • a heat exchanger is positioned within the air path that cools and dehumidifies the process air.
  • a first lint filter within the air path is positioned forward of the drum and below the door opening.
  • a second lint filter within the air path is positioned downstream of the first lint filter and positioned forward of the heat exchanger.
  • the first and second lint filters capture lint from the process air at respective positions upstream of the heat exchanger.
  • the first lint filter is angled with respect to the second lint filter.
  • a filter spray system has a plurality of fluid sprayers that deliver fluid to the first lint filter and the second lint filter, respectively, wherein each fluid sprayer of the plurality of fluid sprayers directs captured lint from the first and second lint filters to a common drain channel.
  • a lint removal system for a laundry appliance includes an air moving unit that directs process air through an air path for processing laundry.
  • a heat exchanger dehumidifies the process air delivered from a rotating drum via the air path.
  • An angled first lint filter is positioned within the air path positioned forward of the rotating drum for capturing lint particles from the process air.
  • a second lint filter is positioned upstream of the heat exchanger and downstream of the angled first lint filter for capturing lint particles from the process air.
  • a first fluid sprayer directs fluid to a surface of the angled first lint filter for removing captured lint from the angled first lint filter.
  • a second fluid sprayer directs the fluid to a surface of the second lint filter for removing the captured lint from the second lint filter.
  • the fluid from the second fluid sprayer and the first fluid sprayer and the captured lint from the angled first lint filter and the second lint filter are directed to a common drain channel.
  • the terms "upper,” “lower,” “right,” “left,” “rear,” “front,” “vertical,” “horizontal,” and derivatives thereof shall relate to the device as oriented in FIG. 1 .
  • the device may assume various alternative orientations and step sequences, except where expressly specified to the contrary.
  • the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
  • reference numeral 10 generally refers to a lint removal system for a laundry appliance 12, or other appliance incorporating a heat pump system 14 having a plurality of heat exchangers 16.
  • the laundry appliance 12 can include a rotating drum 18 and an air path 20 having an air moving unit 22 adapted to deliver air 24 through the air path 20 and through the rotating drum 18.
  • At least a portion of the heat pump system 14 is positioned within the air path 20, and, in particular, at least one of the heat exchangers 16 of the heat pump system 14.
  • the heat pump system 14 serves to condition air 24 within the air path 20 for heating and cooling the air 24 within the air path 20 and also extracting moisture and humidity in the form of condensate 26 from air 24 delivered from the rotating drum 18.
  • the heat exchanger 16 of the heat pump system 14 is adapted to cool and dehumidify air 24 within the air path 20.
  • the heat exchanger 16 condenses moisture within the air 24 into condensate 26 that is captured within a drain channel 28 positioned below the heat exchanger 16.
  • a plurality of air filters 30 are positioned upstream from the heat exchanger 16.
  • the plurality of air filters 30 serve to remove lint 32 from the air 24 delivered to the heat exchangers 16 within the air path 20. Accordingly, a plurality of air filters 30 serve to capture lint 32 within the air 24 of the air path 20 so that the lint 32 does not adhere, or substantially does not adhere, to the heat exchanger 16 of the heat pump system 14.
  • a filter spray system 34 is disposed in communication with the plurality of air filters 30.
  • the filter spray system 34 includes a plurality of fluid sprayers 36 that deliver fluid 38 to each air filter 30 of the plurality of air filters 30.
  • the fluid 38 sprayed onto the plurality of air filters 30 is captured by the drain channel 28.
  • lint 32 present on any one or more of the plurality of air filters 30 is sprayed off by the plurality of fluid sprayers 36 such that the fluid 38 from the sprayers and the lint 32 from the plurality of air filters 30 is moved from the plurality of air filters 30 to the drain channel 28.
  • a fluid pump 40 is disposed in communication with the drain channel 28 and the fluid outlet 42. In this manner, the fluid pump 40 operates to deliver fluid 38 and lint 32 from the drain channel 28 to the fluid outlet 42 and to the exterior of the laundry appliance 12.
  • the heat pump system 14 for the laundry appliance 12 can include a compressor 50, a first heat exchanger 52 in the form of an evaporator 54 that extracts heat 190 at least from air 24 moving through the air path 20 of the laundry appliance 12 and a second heat exchanger 56 in the form of a condenser 58 that releases heat 190 for use in the laundry appliance 12.
  • the heat pump system 14 also includes an expansion device 60 and a refrigerant 62 that moves through a refrigerant line 64 that connects the various components of the heat pump system 14.
  • the operation of a refrigerant-powered heat pump within an appliance is generally known by those having skill in the art.
  • the air moving unit 22 typically in the form of a blower, moves air 24 through the air path 20 and across the damp clothing placed within the drum 18.
  • the blower moves air 24 across the condenser 58 or other heat source such that the air 24 is heated before it moves into the drum 18.
  • the heated air 24 moves across the wet clothing within the drum 18 and extracts moisture from the clothing such that the heated air 24 becomes heated and humid air 70.
  • the heated air 24 also collects lint 32 from the clothing disposed within the drum 18.
  • the heated and humid air 70 that also contains lint 32 is then moved through the plurality of filters wherein the lint 32 carried within the heated and humid air 70 is captured within the plurality of filters.
  • the heated and humid air 70 moves from the plurality of filters to the evaporator 54 or heat sink that extracts heat 190 from the heated and humid air 70.
  • the extraction of heat 190 also causes condensation of the humidity within the heated and humid air 70 from the drum 18. This condensation precipitates from the air 24 and is captured within the drain channel 28 positioned below the evaporator 54.
  • the air 24 is then moved back to the condenser 58 and/or other heat source to be cycled through the air path 20 and drum 18 once again.
  • the lint removal system 10 can include a plurality of air filters 30 for removing lint 32 from air 24 in the air path 20.
  • the plurality of air filters 30 can include first and second lint filters 80, 82 where the second lint filter 82 has a second mesh size smaller than a first mesh size of the first lint filter 80.
  • the first lint filter 80 captures particles of lint 32 having a larger size, which typically accounts for the majority of lint 32 carried within the heated and humid air 70 delivered from the drum 18. Smaller particles of lint 32 not captured by the first lint filter 80 are then moved toward the second lint filter 82 having the smaller second mesh size.
  • the lint removal system 10 can also include a third lint filter 84 having a third mesh size smaller than the second mesh size of the second lint filter 82. In such an embodiment, even smaller particles of lint 32 that pass through the second lint filter 82 may be captured by the third lint filter 84, such that the vast majority of lint carried by the heated and humid air 70 emanating from the rotating drum 18 can be captured within the lint removal system 10. It is also contemplated that the lint removal system 10 may include more than three air filters 30 where each successive air filter 30 includes a mesh size that is smaller than the previous air filter 30 within the plurality of air filters 30.
  • the filter spray system 34 includes a plurality of filter sprayers that are paired with a corresponding air filter 30.
  • a first fluid sprayer 90 is paired with the first lint filter 80
  • a second fluid sprayer 92 is paired with the second lint filter 82
  • a third fluid sprayer 94 is paired with a third lint filter 84, and so on for each air filter 30 within the lint removal system 10.
  • each of the first, second and third fluid sprayers 90, 92, 94 can include two or more subsprayers 96 that are adapted to spray fluid 38 on corresponding filter portions 98 of the respective first, second and third lint filters 80, 82, 84.
  • fluid 38 delivered to the first fluid sprayer 90 can be separately apportioned between the subsprayers 96 of the first and second fluid sprayer 90, 92.
  • different filter portions 98 of the first lint filter 80 can be sprayed through use of the subsprayers 96 of the first fluid sprayer 90, and so on for each air filter 30.
  • each filter portion 98 of the various air filters 30 can be washed at different times.
  • fluid 38 may adhere to the mesh openings of a particular filter portion 98.
  • Air 24 moving through the particular filter portion 98 can, over time, dislodge, remove, evaporate, or otherwise eliminate the adhered fluid 38 from within the particular filter portion 98.
  • the filter portion 98 may be temporarily blocked from allowing air 24 to pass through that filter portion 98.
  • subsprayers 96 for each of the first, second and third lint filters 80, 82, 84 allows for the passage of air 24 within the air path 20 through various filter portions 98 that have not yet been sprayed. This passage of air 24 through the unsprayed filter portions 100 of each air filter 30 also provides for a faster and more expedient removal of the adhered fluid 38 from the sprayed filter portions 102 of the particular air filter 30. Accordingly, the use of the subsprayers 96 within each of the first, second and third fluid sprayers 90, 92, 94 can be sequenced during a particular washing cycle to account for the removal of any adhered fluid 38 within the recently sprayed filter portions 102 of the first, second and third lint filters 80, 82, 84.
  • the subsprayers 96 or nozzles 160 of each of the first, second and third fluid sprayers 90, 92, 94 can be separated into two subsprayers 96, three subsprayers 96, or combinations thereof.
  • the exact number of subsprayers 96 or nozzles 160 for washing each air filter 30 can vary depending upon the amount of lint 32 typically being captured/sprayed, the frequency of spraying cycles, the position of the particular fluid sprayers 36/corresponding air filter 30, combinations thereof, and other similar factors that can bear on the amount of subsprayers 96 needed for a particular air filter 30 within the lint removal system 10.
  • fluid 38 used for the filter spray system 34 can be obtained through an external fluid source 110, such as a wall spigot external to the laundry appliance 12. According to various embodiments, it is contemplated that fluid 38 can be captured through a recycling of condensate 26 captured within the drain channel 28 or other container during use of the heat pump system 14.
  • the laundry appliance 12 can include an electrovalve 112 that regulates the flow of fluid 38, typically water, from the external fluid source 110, or other source of fluid 38.
  • the electrovalve 112 can be a solenoid, stepper motor, servo motor, combinations thereof, or other similar electrically operated motor.
  • the electrovalve 112 for receiving fluid 38 from the external fluid source 110 can include a single fluid valve 114 that is activated and deactivated for delivering fluid 38 from the external fluid source 110 to the filter spray system 34. It is also contemplated that the electrovalve 112 can include a plurality of fluid valves 114 for separately and independently delivering fluid 38 from the external fluid source 110 to various portions of the laundry appliance 12.
  • Fluid valves 114 contained within the electrovalve 112 can be used for delivering fluid 38 to a sprayer system that disposes water within the rotating drum 18, or other similar uses not necessarily related to the filter spray system 34. It is also contemplated that the electrovalve 112 can include a fluid valve 114 that is separately and independently operable and in communication with each of the first, second and third fluid sprayers 90, 92, 94. Accordingly, a first fluid valve 116 may be used for delivering fluid 38 to the first fluid sprayer 90 for cleaning the first lint filter 80. A second fluid valve 118 can be used for delivering fluid 38 to the second fluid sprayer 92 for cleaning the second lint filter 82.
  • a third fluid valve 120 can be used for delivering fluid 38 to the third fluid sprayer 94 for cleaning the third lint filter 84.
  • the various fluid valves 114 can be sequenced to open and close separately, simultaneously, in patterns, in combinations, or other sequences. It should be understood that the exact configuration of the electrovalve 112 and the various fluid valves 114 can be modified depending upon the particular design of the laundry appliance 12 and the configuration of the lint removal system 10.
  • a diverter valve 130 is positioned downstream from the electrovalve 112 and the one or more fluid valves 114 for apportioning fluid 38 between the plurality of fluid sprayers 36, between the subsprayers 96 for each fluid sprayer 36, or both.
  • the diverter valve 130 can be in the form of a stepper motor, solenoid, servo motor, or other similar electrically operated valve for apportioning fluid 38 between the various subsprayers 96 and/or the first, second and third fluid sprayers 90, 92, 94.
  • a primary diverter valve 140 can be in communication with the electrovalve 112, where the primary diverter valve 140 is operable between a plurality of positions, each corresponding to one of the first, second or third fluid sprayer 90, 92, 94.
  • each position of the primary diverter valve 140 is in communication with a fluid line 142 that delivers fluid 38 to one of the first, second or third fluid sprayers 90, 92, 94.
  • Each fluid line 142 connected to the first, second and third fluid sprayers 90, 92, 94, respectively, can include a dedicated diverter valve 144 that apportions fluid 38 between the various subsprayers 96 within each of the first, second and third fluid sprayers 90, 92, 94, respectively.
  • the electrovalve 112 and one or more diverter valves 130 can be operated through an algorithm that sequences the operation of each of the first, second and third fluid sprayers 90, 92, 94 and the subsprayers 96 for each of the air filters 30 according to a preset algorithm.
  • This preset algorithm serves to sequentially operate the spraying of filter portions 98 of the first, second and third lint filters 80, 82, 84 to maximize the spraying operation of each of the fluid sprayers 36 and also minimize the obstruction that may be caused by adhesion of the fluid 38 on the various filter portions 98 of the first, second and third lint filters 80, 82, 84.
  • each of the first, second and third lint filters 80, 82, 84 is sprayed at least once during each drying cycle.
  • the first lint filter 80 may capture more lint 32 during each drying cycle.
  • the first lint filter 80 in various embodiments, may be sprayed multiple times during a particular drying cycle of the laundry appliance 12.
  • the second and third lint filters 82, 84 may be sprayed less during a particular drying cycle, and may be sprayed only at the conclusion of a particular drying cycle.
  • each air filter 30 within the lint removal system 10 can be spaced apart from the other air filters 30 and can be placed in a parallel configuration with each of the other air filters 30 of the lint removal system 10.
  • the spacing between each of the air filters 30 of the lint removal system 10 allows for each respective fluid sprayer 36 to effectively deliver fluid 38 to a front surface 150 of each of the first, second and third lint filters 80, 82, 84 and without interfering with the operation of an adjacent air filter 30 by spraying fluid 38 on the back surface 152 of an adjacent air filter 30.
  • the second fluid sprayer 92 can be adapted to spray fluid 38 on the front surface 150 of the second lint filter 82.
  • the second lint filter 82 is spaced sufficiently far enough from the first lint filter 80 such that operation of the second fluid sprayer 92 can spray fluid 38 onto the front surface 150 of the second lint filter 82 without depositing fluid 38 or depositing substantial amounts of the fluid 38 on the back surface 152 of the first lint filter 80.
  • sequencing of activation and deactivation of the particular subsprayers 96 within the first, second and third fluid sprayers 90, 92, 94 can be configured to minimize the effect of inadvertent spray from contacting a back surface 152 of the first or second lint filters 80, 82 as a result of the operation of the second and third fluid sprayers 92, 94.
  • a gap of approximately 10 mm may be considered between each of the air filters 30 to avoid obstruction by lint 32 and also allows installation and operation of nozzles 160 for the subsprayers 96 during use of the laundry appliance 12. While 10 mm is used as an example herein, the distance between the air filters 30 can vary to be either greater than or less than 10 mm between adjacent air filters 30. The individual spaces between the various air filters 30 within the lint removal system 10 can also vary.
  • the space between the first and second lint filters 80, 82 may be greater than the space between the second and third lint filters 82, 84 where it is contemplated that less lint 32 will accumulate between the second and third lint filters 82, 84 than between the first and second lint filters 80, 82.
  • the first, second and third fluid sprayers 90, 92, 94 can be positioned above or within the air path 20 adjacent to the respective air filter 30. It is also contemplated that the first, second and third fluid sprayers 90, 92, 94 can be incorporated within a wall 170 of the air path 20 for delivering fluid 38 to the first, second and third lint filters 80, 82, 84.
  • the first, second and third fluid sprayers 90, 92, 94 can include a plurality of nozzles 160 that correspond to each of the subsprayers 96 for the first, second and third fluid sprayers 90, 92, 94.
  • Each of the nozzles 160 can deliver fluid 38 in a predetermined fluid path 180 for cleaning the corresponding filter portion 98 of the first, second or third lint filter 80, 82, 84.
  • the fluid path 180 emanating from each nozzle 160 can take any one of various shapes that can include, but is not limited to, a fan spray, a cascade spray, a plurality of individual spray jets, an angled spray path, various shaped or contoured spray patterns, combinations thereof, and other similar fluid paths 180.
  • the particular fluid path 180 can be based upon various factors that may include the desired filter portion 98 of the particular air filter 30 to be sprayed, the shape of the air filter 30, the spacing of the air filters 30, and other similar considerations.
  • the various fluid sprayers 36 can be adapted to direct the fluid 38 in various configurations and directions with respect to the respective air filter 30. It is contemplated that, in various embodiments, one or more of the fluid sprayers 36 can direct fluid 38 toward the back surface 152 of the respective air filter 30. In such an embodiment, any one or more of the fluid sprayers 36 can direct fluid 38 through the back surface 152 of the respective air filter 30 in order to push lint 32 off from and away from the front surface 150 of the respective air filter 30.
  • At least one of the fluid sprayers 36 can be adapted to direct the fluid 38 toward the front surface 150 of a respective air filter 30 and at least one of the other fluid sprayers 36 can be adapted to direct fluid 38 toward the back surface 152 of the corresponding air filter 30.
  • the first fluid sprayer 90 can be configured to direct fluid 38 to the back surface 152 of the first lint filter 80.
  • the second and third fluid sprayers 92, 94 can be configured to direct the flow of fluid 38 to the front surface 150 of the second and third lint filters 82, 84, respectively. While this exemplary embodiment is disclosed, it should be understood that various combinations of front surface 150 fluid sprayers 36 and back surface 152 fluid sprayers 36 can be included in a particular filter spray system 34 of a laundry appliance 12.
  • the spray sequence for cleaning the two or more air filters 30 contained within the lint removal system 10 can be activated by various methods.
  • One such method includes a timer that automatically activates a spray sequence according to certain times within a particular drying cycle. It is contemplated that each type of drying cycle may have a corresponding spray sequence that accounts for the type of clothing being dried and various other parameters that may be indicative of a particular drying cycle.
  • a drying cycle for delicates may result in less accumulation of lint 32 within the plurality of air filters 30 such that fewer spray sequences may need to be performed.
  • a drying sequence for drying towels may require the performance of more frequent spray cycles to clean the plurality of air filters 30 more times to remove greater amounts of lint 32 that may be accumulated within the plurality of air filters 30.
  • the various spray cycles may also be initiated through a temperature-related signal where an increase in temperature of the compressor 50 for the heat pump system 14 may initiate a spray sequence for cleaning the plurality of air filters 30.
  • an increase in temperature of the compressor 50 for the heat pump system 14 may initiate a spray sequence for cleaning the plurality of air filters 30.
  • the movement of air 24 through the air path 20 may become progressively blocked through the accumulation of lint 32.
  • the transfer of heat 190 from the heat exchangers 16 to the air 24 within the air path 20 also becomes more inefficient.
  • the compressor 50 may have to operate at longer intervals to maintain the desired parameters for operating the laundry appliance 12. The longer operation of the compressor 50 increases the temperature in and around the compressor 50.
  • This increase in temperature can be communicated to the laundry appliance 12 through a thermostat, thermocouple, thermistor, or other similar sensor.
  • the sensor of the compressor 50 can communicate temperature readings to a control for the laundry appliance 12 indicating that the blockage of lint 32 is sufficient such that the increase in temperature of the compressor 50 needs to be addressed and the spray sequence needs to be activated to remove a build-up of lint 32 causing the temperature increase within the compressor 50.
  • Other mechanisms for activating a spray sequence can include, but are not limited to, a lint detector, airflow monitors, and other similar monitors that serve to indicate a build-up of lint 32 within the plurality of air filters 30.
  • the fluid 38 from the first, second, and third fluid sprayers 90, 92, 94 as well as the lint 32 collected from the first, second and third lint filters 80, 82, 84, is moved to the drain channel 28 positioned below the evaporator 54 of the heat pump system 14.
  • the condensed fluid 38 precipitated by the evaporator 54 drops into the same drain channel 28 as that of the sprayed fluid 38 and lint 32 mixture.
  • the drain channel 28 can be sloped or otherwise disposed at a particular angle.
  • This angle can be any one of various angles that promotes the flow of fluid 38, and potentially lint 32, from the front portion 200 of the basement 202, where the air filters 30 and fluid sprayers 36 are located, to the rear portion 204 of the basement 202, where the fluid pump 40 is located.
  • the drain channel 28 can include a separate fluid sprayer 36 that can be activated to move fluid 38 and lint 32 within the drain channel 28 and toward the fluid pump 40.
  • the volume of the drain channel 28 can also vary and can be defined based upon an energy tradeoff. The size of a front opening can affect the maximum amount of lint 32 drainable.
  • a 35 mm front opening section in the front portion 200 of the drain channel 28 and an approximately 65 mm rear opening section at the rear portion 204 of the drain channel 28 can be used. It should be understood that other front and rear opening sections can be modified depending upon the desired performance of the particular laundry appliance 12.
  • various air diverters 212 may be implemented within the laundry appliance 12 and in the air path 20 to direct the flow of air 24, such that the heated and humid air 70 from the drum 18, which typically contains lint 32, can be directed through each of the plurality of air filters 30 of the lint removal system 10.
  • the various air diverters 212 that at least partially define the air path 20 can be used to ensure that the flow of air 24 through the air path 20 flows through each of the plurality of air filters 30 within the lint removal system 10. Also, as discussed above, it is contemplated that fewer spray sequences may be activated onto the third lint filter 84 as opposed to the second or first lint filters 82, 80.
  • the design of the lint removal system 10 is such that maintenance of the various air filters 30 and fluid sprayers 36 can be performed primarily by a service technician. Accordingly, the lint removal system 10 may not be equipped with a convenient access panel on the exterior of the laundry appliance 12. This is to deter an owner of the laundry appliance 12 who may not be knowledgeable as to the operation of the lint removal system 10 from trying to maintain the lint removal system 10.
  • the lint removal system 10 is adapted to be substantially maintenance free, such that cleaning and/or maintenance of the heat pump system 14 and the lint removal system 10 is necessary only at substantially infrequent times, such as every six months, annually, bi-annually, every three years, or at greater time intervals, or after a large number of drying cycles of the laundry appliance 12.
  • the fluid pump 40 can include a pump inlet 222 that collects fluid 38 and lint 32 from the drain channel 28 and moves the fluid 38 and lint 32 through an impeller chamber 224, where various impellers 226 draw in the fluid 38 and lint 32 and direct the fluid 38 and lint 32 to a drain conduit 228 and out of the laundry appliance 12 to an external drain 220.
  • the fluid pump 40 can be positioned at a rear portion 204 of the basement 202 of the laundry appliance 12 and the drain conduit 228 can extend upward from the fluid pump 40 such that the fluid pump 40 moves the fluid 38 and lint 32 upward through the drain channel 28 and out through the external drain 220.
  • the external fluid source 110 and external drains 220 are positioned adjacent to one another such that the drain conduit 228 needs to be positioned near the inlet electrovalve 112. In this manner, the lint 32 and fluid 38 can be properly eliminated from the laundry appliance 12.
  • the incorporation of the lint removal system 10 is meant to make removal of lint 32 from the laundry appliance 12 a substantially maintenance-free operation.
  • the laundry appliance 12 can be designed without a removable door-mounted lint filter as is present in conventional laundry dryers.
  • a fence or similar blocking member 240 can be installed within the door opening 210 to prevent larger objects such as coins, Legos, pens, toys, and other similar objects from coming into contact with the first lint filter 80 of the lint removal system 10.
  • This blocking member 240 can include a concave shape for capturing and retaining such items. It is also contemplated that the fence or blocking member 240 can have a convex shape such that larger items can simply roll or slide off the blocking member 240 or can be captured within a collection area adjacent to the blocking member 240.
  • first, second and third lint filters 80, 82, 84 are discussed within various embodiments of the lint removal system 10, it is contemplated that the plurality of air filters 30 may include only first and second lint filters 80, 82. Various embodiments may also include first, second and third lint filters 80, 82, 84 and can also include a third lint filter 84. It is also contemplated that the lint removal system 10 disclosed herein can be positioned in the basement 202 of the laundry appliance 12, or can be positioned in another location of the laundry appliance 12 to provide space for various operational mechanisms of the laundry appliance 12.
  • the lint removal system 10 described herein can also be included within a laundry appliance 12 that includes both washing and drying functions to be an all-in-one laundry appliance 12. It is contemplated that the lint removal system 10 can also be included within laundry appliances 12 of varying sizes, such as a small apartment-type laundry unit as well as a larger commercial-type laundry unit.
  • the lint removal system 10 can be incorporated within various types of appliances that incorporate a heat pump system 14 or other similar refrigerant systems.
  • Such appliances can include, but are not limited to, dryers, refrigerators, freezers, chillers, and other similar appliances that incorporate a heat exchange mechanism.
  • the lint removal system 10 can include an angled lint filter 260 that is typically positioned upstream of the first, second and third lint filters 80, 82, 84.
  • the angled lint filter 260 can also be positioned below the door opening 210 and within the air path 20, where the angled lint filter 260 is positioned therein to separate lint 32 from process air 24 moving through the air path 20.
  • a portion of the filter spray system 34 in the form of an angled spray mechanism 262 is connected to a fluid source 264.
  • the angled spray mechanism 262 is positioned at a first edge 266 of the angled lint filter 260 to spray fluid 38 onto a portion of the angled lint filter 260 in order to remove and capture lint 32 that has been entrapped by a surface of the angled lint filter 260.
  • the lint drain 272 is typically positioned to allow for movement of the fluid 38 and captured lint 270 from the angled lint filter 260 to be delivered to the drain channel 28 in substantially the same manner as captured lint 270 is removed from the first, second and third lint filters 80, 82, 84 toward the common drain channel 28.
  • the angled lint filter 260 can be used in conjunction with any number of the typically vertically oriented first, second and third lint filters 80, 82, 84. Accordingly, the lint removal system 10 may include the angled lint filter 260 along with only the first lint filter 80.
  • the angled lint filter 260 may also be accompanied by additional vertically oriented filters that make up the first, second and third lint filters 80, 82, 84.
  • a bypass member 280 can be positioned at or near the second edge 274 of the angled lint filter 260.
  • the bypass member 280 is selectively operable to a blocking position 282 that directs process air 24 through the angled lint filter 260 and toward the first, second and third lint filters 80, 82, 84 for further removal of lint 32 from the air 24 moving through the air path 20.
  • the bypass member 280 is also operable to a drain position 284 that allows for movement of material from the upstream surface 268 of the angled lint filter 260 and into the lint drain 272 for disposal into the drain channel 28.
  • the bypass member 280 when the bypass member 280 is in the drain position 284, fluid 38 from the angled spray mechanism 262, along with captured lint 270 that is pushed by the fluid 38 from the angled spray mechanism 262, can be moved along the upstream surface 268 of the angled lint filter 260 and into the lint drain 272.
  • the back pressure of the fluid 38 emanating from the angled spray mechanism 262 will have a force 286 sufficient to move the bypass member 280 from the blocking position 282 and into the drain position 284.
  • the bypass member 280 includes a biasing mechanism 290 that applies a biasing force 292 upon the bypass member 280 in the direction of the blocking position 282.
  • the force 286 of the fluid 38 overcomes this biasing force 292 applied by the biasing mechanism 290 to move the bypass member 280 from the blocking position 282 to the drain position 284. Accordingly, the force 286 of the fluid 38 moves the bypass member 280 to open an access aperture 294 to the lint drain 272 to allow for movement of the fluid 38 and captured lint 270 into and through the lint drain 272 and to the drain channel 28.
  • the biasing mechanism 290 biases the bypass member 280 back into the blocking position 282.
  • the bypass member 280 may include one or more drain holes 302 or weep holes. These drain holes 302 allow excess fluid 38 to move or flow past the bypass member 280 and into the lint drain 272 when the opposing biasing force 296 of the fluid 38 is not present. These drain holes 302 are sized and positioned to allow the excess fluid 38 to drain without impeding the flow of air 24 through the air path 20 when the blocking member 240 is in the blocking position 282.
  • the drain holes 302 are also configured to prevent whistling or other air-related noise.
  • the drain holes 302 may also be positioned within the second edge 274 of the angled lint filter 260.
  • the excess fluid 38 may also drain through the filtering material 312 and fall to the drain channel 28.
  • the angled lint filter 260 is typically positioned at an angle such that gravity may at least partially assist in the movement of fluid 38 and captured lint 270 from the upstream surface 268 of the angled lint filter 260 toward the bypass member 280.
  • the gravitational force 286 of the fluid 38 and captured lint 270 by itself, is insufficient to manipulate the bypass member 280 from the blocking position 282 to the drain position 284.
  • the fluid pressure of the fluid 38 projected from the angled spray mechanism 262 generates an opposing biasing force 296 that engages the bypass member 280 to manipulate the bypass member 280 from the blocking position 282 to the drain position 284 for disposal of the captured lint 270 to the drain channel 28.
  • the angled position of the angled lint filter 260 is such that the first edge 266 of the angled lint filter 260 is typically positioned toward the front portion 200 of the cabinet and the lower second edge 274 is positioned rearward of the first edge 266.
  • the angled spray mechanism 262 projects fluid 38 in a predetermined spray pattern or fluid path 180 away from the front portion 200 of the cabinet and toward the drain channel 28 of the lint removal system 10.
  • the angled spray mechanism 262 can direct a stream of fluid 38 onto the upstream surface 268 of the angled lint filter 260 to push the captured lint 270 toward the bypass member 280 and bias the bypass member 280 into the drain position 284.
  • the angled spray mechanism 262 can also be positioned to spray fluid 38 onto a downstream surface 310 or back side of the angled lint filter 260 such that fluid 38 is directed through the filtering material 312 of the angled lint filter 260 for directing captured lint 270 toward the bypass member 280.
  • a portion of the bypass member 280 may extend past the angled lint filter 260 and adjacent the downstream surface 310.
  • fluid 38 sprayed toward a downstream surface 310 of the angled lint filter 260 can also be directed to this extended portion of the bypass member 280 to bias the bypass member 280 from the blocking position 282 to the drain position 284 for disposal of the captured lint 270.
  • bypass member 280 when the bypass member 280 is in the blocking position 282, the bypass member 280 covers the access aperture 294 proximate a top end 320 of the lint drain 272.
  • the bypass member 280 moves to the drain position 284 and opens the access aperture 294 at the top end 320 of the lint drain 272.
  • the lint drain 272 can be a tube, shaft, interstitial space, or other conduit that extends from the top end 320 proximate the bypass member 280 to a bottom end 322 that is positioned over or at least near the drain channel 28 so that captured lint 270 can be disposed into the drain channel 28.
  • the lint drain 272 can also be at least partially defined by a wall 170 of the air path 20 and can be entirely contained within the air path 20.
  • the bypass member 280 when the bypass member 280 is in the blocking position 282, the bypass member 280 may act as an aspect of the air diverter 212 that manipulates the flow of air 24 through the air path 20 for efficient movement through the angled lint filter 260 as well as the first, second and third lint filters 80, 82, 84 of the lint removal system 10.
  • the bypass member 280 can include the biasing mechanism 290 in the form of a spring or other biasing mechanism 290.
  • the bypass member 280 may also be in the form of an elastomeric member having a shape that tends toward the blocking position 282.
  • the biasing force 292 of the fluid 38 directed from the angled spray mechanism 262 serves to deflect a portion of the elastomeric bypass member 280 toward the drain position 284 to open the lint drain 272 and allow for movement of the fluid 38 and captured lint 270 into the lint drain 272.
  • the elastomeric nature of the bypass member 280 serves to return the bypass member 280 to its original shape that defines the blocking position 282.
  • the angled spray mechanism 262 for the angled lint filter 260 can include a secondary fluid line 330 connected with the diverter valve 130, or in some instances, the primary diverter valve 140. Because the angled lint filter 260 is typically positioned as the initial lint filtering member of the lint removal system 10, lint 32 will collect on the angled lint filter 260 more rapidly during operation of the appliance 12. Accordingly, activation of the angled spray mechanism 262 corresponding to the angled lint filter 260 may be operated more frequently to remove the captured lint 270 from the angled lint filter 260.
  • the diverter valve 130 can be operated to allow for the more frequent flow of fluid 38 through the secondary fluid line 330 and to the angled spray mechanism 262 for the angled lint filter 260. Fluid 38 from the angled spray mechanism 262 may also be directed through the lint drain 272 and toward one or more of the first, second and third lint filters 80, 82, 84 to assist in removing lint 32 from these lint filters.
  • the angled lint filter 260 and the first, second and third lint filters 80, 82, 84 can include filtering material 312 having gradually decreasing mesh sizes or gradually decreasing pore size.
  • each successive filter of the lint removal system 10 can be adapted to capture smaller sized particles of lint 32.
  • the angled lint filter 260 will typically have the largest mesh size or pore size for capturing the largest lint particles and also the largest amount of lint 32.
  • the next filter in line, the first lint filter 80 will typically have a slightly smaller mesh or pore size for capturing smaller lint particles.
  • the first lint filter 80 will also typically capture less lint 32 than the angled lint filter 260.
  • the lint removal system 10 includes additional lint filters, such as the second lint filter 82, third lint filter 84, or subsequent lint filters, each successive lint filter can typically be configured to capture smaller sized particles of lint 32 and also smaller amounts of lint 32.
  • the angled lint filter 260 may include multiple spray nozzles 160, where each spray nozzle 160 is operated independently through operation of dedicated diverter valves 130. It is also contemplated that the angled spray mechanism 262 for the angled lint filter 260 may be a single spray nozzle 160 that is adapted to direct a flow of fluid 38 across the entire upstream surface 268 of the angled lint filter 260. In configurations where the angled spray mechanism 262 includes multiple spray nozzles 160, the bypass member 280 can be adapted to be manipulated from the blocking position 282 to the drain position 284 by either of the multiple spray nozzles 160 of the angled spray mechanism 262. The bypass member 280 may also be configured as two separate bypass members 280 that correspond to each spray nozzle 160 of the angled spray mechanism 262 serving the angled lint filter 260.
  • the fluid 38 directed through the secondary fluid line 330 into the angled spray mechanism 262 can be directed from an external fluid source 110 such as a household spigot or faucet. Fluid 38 may also be directed to the secondary fluid line 330 through a dedicated pump that may move fluid 38 from a fluid source 264 within the appliance 12.
  • the internal source of fluid 38 may be captured condensate 26 that may be collected through operation of a heat exchange or heat pump system 14 of the appliance 12.
  • angled lint filter 260 is shown as having a particular angled configuration, it should be understood that the exact angle of the angled lint filter 260 can vary depending upon the design of the appliance 12. It should also be understood that the angled lint filter 260 may be configured to be angled in the opposite direction, or may be angled from the left side of the appliance 12 toward the right side of the appliance 12, or vice versa. The exact configuration of the angled lint filter 260 as well as the positioning of the angled spray mechanism 262 may vary depending upon the exact design of the appliance 12 that incorporates the lint removal system 10.

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

Claims (11)

  1. Wäschehaushaltsgerät (12), umfassend:
    eine rotierende Trommel (18) zum Verarbeiten von Wäsche;
    eine Tür, die innerhalb einer Türöffnung (210) betreibbar ist und die selektiven Zugriff auf die rotierende Trommel (18) bereitstellt;
    ein Gebläse, das Prozessluft durch einen Luftpfad (20) lenkt, der die rotierende Trommel (18) einschließt;
    einen innerhalb des Luftpfads (20) positionierten Wärmetauscher (56), der die Prozessluft kühlt und entfeuchtet;
    ein erstes Fusselfilter (80) innerhalb des Luftpfads (20), das vor der rotierenden Trommel (18) und unterhalb der Türöffnung (210) positioniert ist;
    ein zweites Fusselfilter (82) innerhalb des Luftpfads (20) stromabwärts des ersten Fusselfilters (80) und positioniert vor dem Wärmetauscher (56),
    wobei die ersten und zweiten Fusselfilter (80, 82) Fussel (32) aus der Prozessluft an jeweiligen Positionen stromaufwärts des Wärmetauschers (56) einfangen; und
    das erste Fusselfilter (80) in Bezug auf das zweite Fusselfilter (82) abgewinkelt ist; und
    ein Filtersprühsystem (34), das eine Vielzahl von Fluidsprühern (36) aufweist, die jeweils Fluid (38) an das erste Fusselfilter (80) und das zweite Fusselfilter (82) ausliefern, wobei jeder Fluidsprüher (36) aus der Vielzahl von Fluidsprühern (36) eingefangene Fussel (270) von den ersten und zweiten Fusselfiltern (80, 82) zu einem gemeinsamen Abflusskanal (28) lenkt,
    wobei das erste Fusselfilter (80) ein abgewinkeltes Fusselfilter (260) ist, das eine erste Kante (266), die zu einem Frontbereich eines Schranks positioniert ist, und eine niedrigere zweite Kante (274), die rückwärtig der ersten Kante (266) positioniert ist, aufweist,
    wobei ein Abschnitt des Filtersprühsystems (34) einen abgewinkelten Fluidsprüher (36) einschließt, der das Fluid (38) über eine Oberfläche des abgewinkelten Fusselfilters (260) lenkt;
    ein Umgehungsglied (280), das zu einer Blockadeposition (282) vorgespannt ist und das Prozessluft durch das abgewinkelte Fusselfilter (260) lenkt, wobei
    Fluid von dem abgewinkelten Fluidsprüher (36) das Umgehungsglied (280) zu einer Abflussposition (284) vorspannt, die das Fluid (38) und eingefangene Fussel (270) in einen Fusselabfluss (272) hinein lenkt; und
    der Fusselabfluss (272) durch das Umgehungsglied (280) in der Blockadeposition (282) blockiert ist.
  2. Wäschehaushaltsgerät (12) nach Anspruch 1, wobei das Filtersprühsystem (34) ein Umleitventil (130) einschließt, das selektiv das Fluid (38) zwischen der Vielzahl von Fluidsprühern (36) aufteilt.
  3. Wäschehaushaltsgerät (12) nach Anspruch 1 oder 2, wobei der Fusselabfluss (272) das Fluid (38) und die eingefangenen Fussel (270) zu dem gemeinsamen Abflusskanal (28) lenkt, der unterhalb des Luftfilters (30) und des Wärmetauschers (56) positioniert ist.
  4. Wäschehaushaltsgerät (12) nach Anspruch 3, wobei der gemeinsame Abflusskanal (28) Kondensat von dem Wärmetauscher (56) empfängt.
  5. Wäschehaushaltsgerät (12) nach einem der Ansprüche 1-4, wobei die Vielzahl von Fluidsprühern (36) das Fluid (38) an jeweilige stromaufwärtige Oberflächen der ersten und zweiten Fusselfilter (80, 82) liefert.
  6. Wäschehaushaltsgerät (12) nach einem der Ansprüche 1-5, wobei das zweite Fusselfilter (82) eine Vielzahl von nacheinander positionierten Filtern einschließt, die in einer vertikalen Orientierung angrenzend an den Wärmetauscher (56) positioniert sind, und wobei das Filtersprühsystem (34) entsprechende Fluidsprüher (36) einschließt, die das Fluid (38) jeweils an die Vielzahl von Filtern liefern.
  7. Wäschehaushaltsgerät (12) nach einem oder mehreren der Ansprüche 3-6, wobei jeder Fluidsprüher (36) aus der Vielzahl von Fluidsprühern (36) mindestens eine Sprühdüse (160) einschließt, die ein Spray des Fluids (38) lenkt, um das Fluid (38) und die eingefangenen Fussel (270) zu dem gemeinsamen Abflusskanal (28) zu bewegen.
  8. Wäschehaushaltsgerät (12) nach Anspruch 7, wobei das zweite Fusselfilter (82) mehrere Sprühdüsen (160) einschließt, die nacheinander betrieben werden und um Wasser zu unterschiedlichen Abschnitten des zweiten Fusselfilters (82) zu lenken.
  9. Wäschehaushaltsgerät (12) nach einem oder mehreren der Ansprüche 1-8, wobei:
    das abgewinkelte Fusselfilter (260) und das zweite Fusselfilter (82) jeweils ein Netz einschließen, das die Fusselpartikel einfängt, wobei das abgewinkelte Fusselfilter (260) eine erste Maschenweite aufweist und das zweite Fusselfilter (82) eine zweite Maschenweite aufweist, die kleiner als die erste Maschenweite ist.
  10. Wäschehaushaltsgerät (12) nach einem oder mehreren der Ansprüche 1-9, wobei der abgewinkelte Fluidsprüher (36) an der ersten Kante (266) des abgewinkelten Fusselfilters (260) positioniert ist.
  11. Wäschehaushaltsgerät (12) nach einem oder mehreren der Ansprüche 1-9, wobei das Umgehungsglied (280) an der niedrigeren zweiten Kante (274) des abgewinkelten ersten Fusselfilters (80) positioniert ist.
EP17184083.8A 2016-08-10 2017-07-31 Wartungsfreier trockner mit mehreren selbstreinigenden flusenfiltern Active EP3282050B1 (de)

Applications Claiming Priority (4)

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US201662372825P 2016-08-10 2016-08-10
US201762449838P 2017-01-24 2017-01-24
US15/658,971 US10633785B2 (en) 2016-08-10 2017-07-25 Maintenance free dryer having multiple self-cleaning lint filters
US15/658,934 US10087569B2 (en) 2016-08-10 2017-07-25 Maintenance free dryer having multiple self-cleaning lint filters

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EP3282050A1 EP3282050A1 (de) 2018-02-14
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KR102604236B1 (ko) * 2016-06-23 2023-11-21 엘지전자 주식회사 세탁물 건조기
DE102018104694B3 (de) * 2018-03-01 2019-06-27 Miele & Cie. Kg Wärmepumpengerät
CN113638177B (zh) * 2020-05-11 2024-02-13 重庆海尔滚筒洗衣机有限公司 一种洗干一体机
WO2023203833A1 (ja) * 2022-04-21 2023-10-26 日立グローバルライフソリューションズ株式会社 洗濯乾燥機

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JP2006187449A (ja) * 2005-01-06 2006-07-20 Toshiba Corp 洗濯乾燥機
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