• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    14 ABSTRACT The invention relates to a clothes tumble dryer (10) comprising a rotatingdrum (12) and a closed processing air duct adapted to circulate processingair (14) through the drum. The dryer further comprises a heater or first heatexchanger adapted to heat the processing air before it enters the drum (12)and a second heat exchanger adapted to remove moisture from theprocessing air (14) after it has passed through the. Further, a |int filter (18) ispositioned in the duct to remove |int from the process air (14). Furthermore,the dryer (10) comprises an accumulator tank adapted to collect condensewater from the second heat exchanger and a water pump (20) adapted topump the water from the accumulator tank. The invention is characterized inthat the water pump (20) is fluidly connected to a nozzle means (24) via acleaning circuit (26, 28,30a-d), wherein the circuit is adapted to hold a waterpressure generated by the pump (20) and guide the condense water from thepump (20) to the nozzle means (24) in order to spray condense water ontothe |int filter (18). (fig. 1)
    公开号:SE1150742A1
    申请号:SE1150742
    申请日:2011-08-15
    公开日:2013-02-16
    发明作者:Roine Linnarsson
    申请人:Asko Cylinda Ab；
    IPC主号:
    专利说明:

    TECHNICAL FIELD The invention relates generally to a dryer for drying moist water, the dryer being a free-standing unit or in combination with a washing machine comprising a smudge washing function. More particularly, the invention relates to an improved lint filter cleaning mechanism located within the dryer or washer / dryer combination unit.
    Background Condenser dryers include a rotating drum called a tumbler, a means for heating / cooling air and a line for supplying process air, among other things. The process air is cooled and reheated.
    A common type of condensate dryer has a heat exchanger that uses ambient air to cool the process air and an electric heater for reheating. The electric heater could cla be replaced by a heat exchanger with hot water. Another type of condenser dryer uses a heat pump where the evaporator cools and condenses the process air and the condenser reheats the air.
    The hot process air is channeled via the process air duct to the tumbler which contains the moist water. The warm air evaporates the moisture present in the water and then helps to dry the clothes. The evaporated moisture interacts with the process air and thus carried the moisture. The moisture in the air is extracted as condensation and then the process air is reheated and fed back into the rotating drum. This condensation or collected condensed water is channeled and stored in a tank arranged in the base plate of the machine. A water pump is then used to pump the condensate to a condensate water tank in the upper part of the machine.
    The condensation and heating of the process air in condensate dryers normally consumes more energy than traditional dryers, where the air is not recirculated. However, the waste energy in the condensate dryers heats the 2 ambient air in the building where the dryer is occupied, which & al * the total efficiency of the machine.
    During the drying cycle, small fibers are released from clothes due to the tumbling action of the machine. These small fibers are known as fluff or fluff and are often enough to be carried by the process air. During the condensation process, it is common for lint present in the process air to stick to the heat exchanger and other parts of the machine. This buildup of lint can create several problems inside the machine such as clogging of machine parts, which causes an impact on the function and performance of the machine.
    Several solutions have been proposed to overcome the phenomenon of lint deposition. Such a solution describes the placement of a fluff filter in the path of the process air to trap fluff in the air. Furthermore, the lint filter can be placed in many places in the process air duct as the point where the process air is diverted out of the dryer. Another solution aimed at limiting lint deposition is periodic washing of the surface of the heat exchanger by spraying the condensate on the heat exchanger.
    However, the above-mentioned solutions have many disadvantages. Although several lint filters are provided, lint still reaches the heat exchanger due to leakage and poor filtration of the filters. Furthermore, the absence of a proper filter cleaning mechanism or the reliance on manual cleaning alone results in the filters becoming clogged and affecting the overall efficiency of the dryer. During clogging, a large pressure drop is created which in the process air circuit and pumping of air through very clogged fluff filters becomes very black. 25 There are also known solutions for condensate dryers with heat pumps where the heat exchangers are sprayed off with condensate. This is also not particularly effective as all the lint attached to the heat exchanger is not washed off properly. In addition, as the drop height for the condensate to the heat exchanger is limited, a proper cleaning force cannot be achieved. In addition, the design of the heat exchanger is very complicated because it includes a number of sensitive components such as fins and thus cleaning of the heat exchanger can also cause damage to these components.
    SUMMARY OF THE INVENTION The object of the present invention is therefore to provide a tumble dryer with a new and improved automatic cleaning mechanism.
    The draft dryer according to the invention comprises a rotating drum and a closed process air duct arranged to circulate the process air through the drum. The dryer comprises a heater or first heat exchanger 10 arranged to heat the process air before it enters the drum and a second heat exchanger arranged to condense moisture from the process air after it has passed through the drum. A fluff filter is placed in the duct for all fluff removed from the process air. Furthermore, the dryer comprises an accumulator tank adapted to collect condensing water from the second heat exchanger and a water pump arranged to pump water from the accumulator tank.
    The draft dryer according to the invention can be characterized in that the water pump is fluidly connected to a nozzle means via a cleaning circuit, the circuit being arranged to maintain a water pressure generated by the water pump and direct the condensed water from the pump to the nozzle means for spraying condensate water.
    The improved lint filter cleaning mechanism effectively handles the problem of lint deposition on the surface of the lint filter and thus prevents lint from reaching the surface of the second heat exchanger and other parts of the dryer. In addition, the improved cleaning assembly allows the condensate to be sprayed out at a high pressure, thereby achieving a higher mechanical cleaning. The solution is a particularly suitable dryer where the heat exchangers and / or other parts clogged with lint can not be removed because they are connected to a cooling circuit, a hot water circuit or the like. Said cleaning circuit comprises a control element and a water filter, the control element and the water filter being connected to each other and to the pump and the nozzle means via water pipes.
    Furthermore, the control element consists of a two-way valve adapted to direct the water towards the nozzle member or to a condensate water tank outside the cleaning circuit. The two-way valve seems to control the amount of water supplied to the filter and the excess water is redirected to the condensate water tank which is present outside the cleaning circuit.
    Furthermore, the water filter is substantially sealed to maintain the water pressure in the cleaning circuit and is also removable from the dryer to allow the user to clean it.
    Preferably, the accumulator tank is formed in a base plate by the dryer. This enables Mr a simple and efficient collection of water because gravity drives the water flow. Furthermore, this arrangement overcomes the need to aft supply any additional equipment for collecting and channeling the water.
    Furthermore, the nozzle is adapted to spray away lint collected on the lint filter, water / condensate water with lint is drained to the accumulator tank.
    In an advantageous embodiment of this invention, the lint filter is placed in front of the second heat exchanger in the flow direction of the process air so that lint is collected by the lint filter before the air reaches the second heat exchanger. This advantageous placement of the lint filter in front of the heat exchanger and other parts exposed to lint results in the filter acting as a mechanical barrier, thus helping to prevent lint from reaching the other heat exchanger and other parts, which prevents subsequent lint deposition and build-up.
    Preferably, the lint filter can be removed from the dryer, which is helpful in simple manual cleaning in the event of a failed spray function or replacement in the event of extensive damage. Furthermore, such an arrangement facilitates easy cleaning everywhere on the machine with the help of a tap water.
    Furthermore, the nozzle means consists of a lance with openings along at least one edge of the lint filter for all substantially spraying water on the filter along the entire edge. Some arrangements require that the entire lint filter be washed in one cycle.
    In another advantageous embodiment of this invention, the lint filter is electrically rechargeable so as to be able to attract lint from the process air. This arrangement develops a static charge in the filter unit and thus contributes to attracting fluff that is present in the process air. Furthermore, the static charge also causes the fluff to stick to the filter and not fly away from the pressure from the incoming process air.
    In another advantageous embodiment of this invention, at least one further lint filter located in the process air duct Mr aft facilitates correct removal of lint from the process air.
    Brief Description of the Drawings In the following sections, the invention will again be described in greater detail with reference to embodiments shown in the accompanying figures. It should be emphasized that the embodiments shown are used by way of example only and should not be used to limit the scope of the invention.
    FIG. 1A shows a perspective view of a tumble dryer according to an embodiment of the invention; FIG. 1B shows another perspective view of a draft dryer according to an embodiment of the invention; FIG. 2 shows a perspective view of a tumble dryer without the tumbler according to an embodiment of the invention, and FIG. 3 shows in detail the lint filter and the nozzle member according to an embodiment of the invention.
    One skilled in the art will recognize that various features described in the specification may be modified, and various embodiments described and / or set forth in the claims may be combined without departing from the scope of the invention.
    Detailed Description Figure 1A and Figure 1B show a draft dryer 10 according to an embodiment of the present invention. The draft dryer 10 comprises a rotating drum 12, a closed process air duct (not shown) and a first and second heat exchangers. The heat exchangers are arranged inside a chamber 27 and therefore not visibly shown in the view.
    Those skilled in the art would recognize that the second heat exchanger can be cooled by ambient air or water, or is a conductor that is part of a heat pump. Those skilled in the art would further appreciate that the first heat exchanger may be an electric heater, a heat exchanger where hot water or air is used for hot process air, or a condenser which is part of said heat pump. The present invention is therefore directed to the types of dryers. In the following, the heat exchanger / evaporator will be called another heat exchanger and the heater / heat exchanger / condenser will be called other heat exchangers.
    The process air 14 flows from the drum through the duct to the second heat exchanger via the lint filter. The air duct consequently connects the drum with the filter. The duct is not an essential part of the invention and is therefore removed to illustrate the parts of the dryer behind it. As shown in Figure 4, the process air flows vertically in a filter space 35 and then travels horizontally and passes through the filter 18. The space is closed at the front of the machine by a roof part (not shown). The lint filter 18 is removably fixed in front of the second heat exchanger Mr to remove lint from the incoming process air 14. As will be apparent to a person skilled in the art, the lint filter 18 is a standard lint filter and is generally a screen / night made of nylon. The lint filter is placed on the second heat exchanger in the flow direction of the process air so that lint is collected by the lint filter before the air reaches the second heat exchanger. This advantageous placement of the lint filter before the heat exchanger and other parts exposed to lint results in the filter acting as a mechanical barrier, and thus helps to prevent any lint from the other heat exchanger and other parts, which prevents subsequent lint deposition and build-up.
    Further, attached to the lint filter 18 is the nozzle member 24 which is fluidly connected to a water pump 20 via a cleaning circuit. The water pump is housed in an accumulator tank. The pump is not visible in the figures, but is located in the spirit of the pipe 30a, near the bottom plate. The accumulator tank is arranged on a conventional base plate 22 of clothes dryer 10 and not visible in the figures.
    The pump is placed in or near the accumulator tank in order to be able to pump water collected in the tank. If the pump is not placed in the water, use 15 pipes that pump pump water from the accumulator tank via the pump to the nozzle means 24.
    The cleaning circuit comprises control element 26 and a water filter 28, the control element 26 and the water filter 28 being fluidly connected to each other to the water pump 20 and the nozzle member 24 via a group of water pipes (a, b, c and d). Figure 2 shows another alternative view of the draft dryer van in the tumbler 12 not shown. The pipe 30a leading from the water pump 20 to the water filter 28 is clearly seen in the view.
    FIG. 3 shows in detail the lint filter 18 and the nozzle member 24 according to an embodiment of the invention. The nozzle member 24 consists of a lance 32, 25 with the lance 32 having small downward slits / slits / openings 34. The lance 32 is located along the upper edge of the lint filter 18. Water for cleaning the lint filter 18 is transported through these slits / slides / openings 34 for aft spray the lint filter 18. Those skilled in the art would appreciate that the lance may be positioned along any hoist of edge or edges (more than one) of the 8 I cap filter.
    The cleaning circuit is closed between the water pump 20 and the nozzle member 24. This meant that a high pressure can be built up, which means that the condensate can be sprayed at a high pressure and thus achieve a higher cleaning effect. This is a significant improvement compared to a solution where the open condensate tank 36 is part of the circuit.
    In operation, when a user activates the draft dryer 10 to dry moist laundry, ambient air 14 is drawn into the process air duct and heated by the first heat exchanger. This hot process air is supplied to the rotating drum 12 to dehumidify and dry the moist water. The process air is discharged and recirculated continuously. The lint particles carried by the process air are filtered by the lint filter 18.
    Thereafter, the moisture present in the process air at the second heat exchanger is condensed and the condensate or condensed water collects in the accumulator tank in the base plate 22. The continuous operation of the dryer 10 gives rise to a gradual deposition of dirt on the lint filter 18 and thus a cleaning filter mechanism is required. 18 and maintain the overall efficiency of the tumble dryer 10.
    To clean the fluff filter 18, the collected condensate in the accumulator tank is pumped by the water pump 20 through tubes 30a to a water filter 28 and from the water filter 28 condensed water is supplied via the pipe 30b to a control element 26, the control element 26 being a two-way valve. As will be apparent to one skilled in the art, the two-way valve / control element 26 used is a conventional two-way valve that is controlled / actuated by a servo or solenoid or is motor driven.
    The two-way valve / control element 26 channels the condensate either to a lance 32 via pipe 30c or to another condensate tank 36 provided outside the cleaning circuit via a pipe 30d. The two-way valve / control element 26 acts to control the amount of condensate supplied to the lint filters 18 and 9. The excess condensate is redirected to the condensate tank 36. Furthermore, the condensed water accumulated in the condensate tank 36 can be disposed of manually by the user at the end of the drying cycle.
    When a need arises for cleaning the lint filter 18, the condensed water is pumped by the water pump 20 and the two-way valve / control element 26 is actuated to channel the condensate to the nozzle means 24. Condensed water is led from the nozzle means 24 to the lance 32, the water passing through small downward directions. slots / halts / openings 34 located on the lance 32 and mounted on the lint filter 18.
    The lance 32 is located Wigs edge or the edges of the lint filter 18. This construction substantially allows spraying of the condensate water on the lint filter 18 along its entire edge. Furthermore, these small downward slits / openings 34 help to create an even water spray over the entire lint filter 18. Furthermore, the lint which is removed together with the used water from the above spray is transported in a channel (not shown) to the accumulator tank.
    As the cleaning cycle of the lint filter 18 continues, the condensed water is pumped and circulated from the accumulator tank in the base plate 22 to the nozzle member 24 in a manner described above. Since lint previously sprayed from the lint filter 18 is collected in the accumulator tank, the lint is also pumped together with the condensed water. The water filter 28 serves to filter and collect lint circulating in connection with the condensed water.
    Salunda bilk: 4.s water free from contaminants to facilitate washing of the lint filter 18. Furthermore, the water filter 28 is shaped to have a sealed lid which facilitates maintaining a pressure in the cleaning circuit. Della pressure helps to generate a significant force when spraying the lint filter 18. In addition, the lid ensures that there are no varnishes in the cleaning circuit. The water filter 28 is further fixed by means of a bayonet or thread on the body of the tumble dryer 10. In addition, the lint accumulated in the water filter 28 must be cleaned or emptied on a periodic basis by the user to prevent biological growth or inefficient operation of the lint filter cleaning mechanism. Furthermore, it should be noted that the spraying of the lint filter 18 can be done at regular intervals or only once at the end of the drying cycle since most of the lint is released from the clothes during the last phase of the operation. The duration and time of the cleaning cycle are pre-programmed and stored on a PLC / computer located in the dryer 10 10. It is also possible for a user to initiate a lint filter cleaning cycle according to his / her needs.
    In one embodiment of this invention, the lint filter 18 may be electrostatically charged to better attract lint particles. Furthermore, the electrostatic charge also ensures that the lint particles are held on the lint filter 18 despite the flow of the process air.
    In one embodiment of this invention, the lint filter 18 is removable for periodic cleaning as for a tap water.
    In one embodiment of this invention, in addition to the lint filter 18, the drum 12 will also retain the traditional double filters (nylon) in the dryer tube, and possibly also an additional lint filter 18 in the channel below the diaphragm. Dad & the drum 12 will also have at least one additional lint filter 18 which is placed elsewhere to remove lint from the process air 14.
    The reference numbers in the claims should not be construed as limiting the scope of what is protected by the claims, and their sole function is to make the claims easier to understand. As will be appreciated, the invention may be modified in various obvious respects, all without departing from the scope of the claims. attached 11 claims. Consequently, the drawings and description dartiii are to be regarded as illustrative in nature, and not restrictive.
    权利要求:
    Claims (11)
    [1] 1. Clothes tumble dryer (10) comprising a rotating drum (12) and aclosed processing air duct adapted to circulate processing air (14)through the drum (12), the dryer comprising a heater or first heatexchanger adapted to heat the processing air (14) before it enters thedrum (12) and a second heat exchanger adapted to condense moisturefrom the processing air (14) after it has passed through the drum (12), a|int filter (18) being positioned in the duct to remove |int from the processair(14), the dryer (10) comprising an accumulator tank adapted to co|ectcondense water from the second heat exchanger and a water pump (20) adapted to pump the water from the accumulator tank,characterized in that wherein the water pump is fluidly connected to nozzle means (24) viaa cleaning circuit (26, 28,30a-d), wherein the circuit is adapted to holda water pressure generated by the water pump (20) and guide thecondense water from the pump (20) to the nozzle means (24) in orderto spray condense water onto the |int filter (18).
    [2] 2. Cloths tumble dryer according to claim 1 wherein the cleaning circuitcomprises a control element (26) and a water filter (28) beingconnected to each other and to the pump (20) and nozzle means (24) via water pipes (30a-d).
    [3] 3. Cloths tumble dryer according to claim 2 wherein the control element(26) consist in a two-way valve being adapted to guide the watertowards the nozzle means or to a condense water (36) tank outsidethe cleaning circuit. 13 _ Clothes tumble dryer according to any of the claims 2 - 3 wherein the water filter (28) is substantially sealed to remain the water pressure inthe cleaning circuit and removable from the dryer (10) to be cleaned by a user. _ Clothes tumble dryer according to any of the preceding claims wherein the accumulator tank is formed in a baseplate (22) of the dryer (22). _ Clothes tumble dryer according to any of the preceding claims wherein the nozzle means (24) is adapted to spray off lint collected on the lintfilter (18), wherein the condense water with the lint is drained to the accumulator tank. _ Clothes tumble dryer according to any of the preceding claims wherein the lint filter (18) is positioned before the second heat exchanger in theflow direction of the processing air (14) so that the lint is collected bythe filter (18) before the air reaches the second heat exchanger. _ Clothes tumble dryer according to any of the preceding claims wherein the lint filter (18) is removable from the dryer. _ Clothes tumble dryer according to any of the preceding claims wherein the nozzle means (24) consist in a lance (32) with openings (34) alongat least one edge of the lint filter to substantially spray water onto the filter (18) along the whole edge. 10_Clothes tumble dryer according to any of the preceding claims wherein the lint filter (18) is electrically chargeable to be able to attract lint from the processing air (14). 1 1 .Clothes tumble dryer according to any of the preceding claims wherein at least one further lint filter is positioned in the duct to remove lint from the process air (14).
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    法律状态:
    2020-04-28| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1150742A|SE537671C2|2011-08-15|2011-08-15|Cloth dryer with lint filter cleaning mechanism|SE1150742A| SE537671C2|2011-08-15|2011-08-15|Cloth dryer with lint filter cleaning mechanism|
    EP12180492.6A| EP2559805B1|2011-08-15|2012-08-15|Clothes dryer with lint cleaning mechanism|
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