EP4141163A1 - Sèche-linge doté d'un système de nettoyage à échangeur de chaleur - Google Patents

Sèche-linge doté d'un système de nettoyage à échangeur de chaleur Download PDF

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Publication number
EP4141163A1
EP4141163A1 EP21192536.7A EP21192536A EP4141163A1 EP 4141163 A1 EP4141163 A1 EP 4141163A1 EP 21192536 A EP21192536 A EP 21192536A EP 4141163 A1 EP4141163 A1 EP 4141163A1
Authority
EP
European Patent Office
Prior art keywords
opening
evaporator
condensate water
condenser
dryer according
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.)
Pending
Application number
EP21192536.7A
Other languages
German (de)
English (en)
Inventor
Thomas KEUSCH
Markus Zwimpfer
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.)
V-Zug AG
Original Assignee
V-Zug AG
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 V-Zug AG filed Critical V-Zug AG
Priority to EP21192536.7A priority Critical patent/EP4141163A1/fr
Publication of EP4141163A1 publication Critical patent/EP4141163A1/fr
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing 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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • 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

Definitions

  • the invention relates to a dryer, in particular a household tumble dryer.
  • a dryer in particular a household tumble dryer.
  • This includes a drum for holding textiles and a heat pump with a condenser and an evaporator. Air circulates through the drum, condenser and evaporator. This removes moisture from the textiles.
  • the dryer includes a first collection container for collecting condensate, which is separated at the evaporator.
  • the air circulating in the dryer not only removes moisture as it flows through the drum, but also pulls fluff from the textiles.
  • Classic dryers therefore provide fluff filters to filter the fluff out of the air flow. This prevents the heat pump's heat exchangers from becoming contaminated with fluff. Lint deposits on the heat exchangers affect the performance of the heat exchangers.
  • a lint filter does not work perfectly. A small amount of fluff penetrates the fluff filter. For this reason, several filter stages are provided in classic dryers. The first filter stage must be cleaned regularly by the user, preferably after each drying process. Other filter stages are slightly covered with fluff, so that they rarely have to be cleaned by a service technician. Nevertheless, calling in a service technician is tedious.
  • the object is to provide a dryer which can be easily maintained.
  • the dryer includes a cleaning system for cleaning the front surface of the evaporator.
  • the cleaning system uses the condensate collected in the first collection tank for cleaning.
  • the cleaning system has the advantage that the front surface of the evaporator, on which fluff is deposited, can be washed off using the collected condensate water.
  • a fluff filter can be completely dispensed with, or the number of filter stages can be reduced. For example, only a single filter stage is provided, which can be cleaned by the user.
  • the first collection container includes a level sensor. This can be used to measure the level of the condensate in the first collection tank. If the fill level is high enough, the controller can start cleaning the evaporator.
  • the supply line extends over as great a vertical height as possible within the dryer.
  • This has the advantage that condensate water conveyed from the first collection container into the supply line and can be stowed in this over as great a height as possible.
  • a high hydrostatic pressure has the advantage that the accumulated water can be flushed over the evaporator in surges. This causes a good cleaning result. A significant amount of fluff can be washed off the evaporator as a result.
  • the supply line advantageously includes an opening mechanism with a first opening which can be opened and closed.
  • the opening mechanism serves to dam the condensate water in the supply line when the opening is closed. If the condensate water is backed up and the first opening opens, the backed up condensate water flows in surges over the evaporator.
  • the opening mechanism includes a flap. With this, the opening can be opened and closed, in particular abruptly.
  • the first openable opening is arranged at the end of the feed line.
  • the "end" means the end of the supply line where the condensate water flows out of the supply line. If the opening that can be opened is arranged at this end, the condensate water can be dammed over the entire length of the supply line. A correspondingly high hydrostatic pressure is generated.
  • the first opening is advantageously arranged directly above the evaporator, in particular above the front surface of the evaporator.
  • the accumulation of the condensate begins immediately above the evaporator. This measure also aims to ensure that the condensate water can be dammed up in the supply line over as great a height as possible.
  • Part of the first opening is preferred, in particular at least a third, in particular the Half of the first opening, located in front of the front surface and at the same time above the front surface of the evaporator.
  • "In front of" the front face is to be understood in relation to the flow direction of the air, ie upstream of the front face or where the air flows before it enters the evaporator.
  • the condensate water can thus be routed from the outside to the front surface. This leads to effective cleaning because the fluff is mainly deposited on the front surfaces.
  • the first opening extends over the entire top of the front surface of the evaporator.
  • the total surface corresponds to the total width of the front face. If the opening extends over the entire width of the front surface of the evaporator, the condensate water can be backed up over the entire width of the front surface behind the openable first opening. As a result, when the first opening is opened, condensate water is flushed evenly over the entire front surface. A complete cleaning of the front surface can be achieved in this way.
  • the first opening is advantageously an elongate gap and in particular has a single opening area.
  • the condensate water is not sprayed onto the front surface of the evaporator through a plurality of nozzles, but the condensate water flows over the entire width of the opening and uniformly cleans the front surface of the evaporator.
  • the opening mechanism is designed to completely open the first opening abruptly, ie in particular within a maximum of two seconds, in particular within a maximum of one second, in particular within a maximum of 0.5 second, in particular within a maximum of 0.2 second.
  • a sudden opening has the advantage that the largest possible amount of condensate flows over the front surface of the evaporator within a short time. This causes an effective cleaning.
  • the opening mechanism advantageously has a second opening which is arranged above the condenser. Condensate water, which is used to clean the condenser, can flow through this opening. In particular, the front surface of the condenser is cleaned.
  • the condenser is generally less dirty than the evaporator because the air first flows through the evaporator and only then through the condenser. Nevertheless, it should also be possible to clean the condenser in order to further reduce the maintenance work on the dryer.
  • the supply line separates into a first sub-line and a second sub-line.
  • the first branch pipe directs the condensate water to the first opening and the second branch pipe directs the condensate water to the second opening.
  • the condensate water routed to the condenser is preferably collected in the first collection container after the condenser has been cleaned.
  • the condensate water which is already slightly contaminated with fluff, can be used again to clean the heat exchanger.
  • the dryer advantageously includes a second collection container. This is arranged in such a way that the condensate water routed to the evaporator is collected in the second collection tank after the front surface of the evaporator has been cleaned.
  • the dryer includes a pump with which the condensate water collected in the second collecting tank can be pumped into the drain. This means that the condensate water, which is heavily soiled with fluff, is not used for renewed cleaning. It goes down the drain.
  • the condensate water routed to the evaporator is flushed directly into the drain after the front surface of the evaporator has been cleaned. This means that the condensate water is not collected in the collection tank for a long period of time.
  • the dryer advantageously includes access for the user to fill the first collection container with water, in particular with the first collection container having a volume of at least one liter, in particular at least two liters. If the evaporator is very dirty but there is not enough condensate water available to clean it, the user can fill additional water into the first collection tank so that cleaning is possible immediately.
  • the dryer includes a single lint filter with a single filter stage. Further filter stages can be dispensed with. Because the filtering does not have to be particularly effective because the heat exchangers can be washed off.
  • FIG. 1 shows a domestic tumble dryer shown schematically. This comprises a housing 1 with a door 1a, a drum 2 (shown in dashed lines) with an axis of rotation 21 and a base area 3 arranged below the drum 2. In the base area 3 are an evaporator 4, a condenser 5, a first collection container 6 and a second Collection container 7 arranged. Evaporator 4 and condenser 5 are part of a heat pump.
  • the user fills the drum 2 with damp laundry to dry. During drying, air flows through the drum 2 and removes moisture from the laundry. The humid air flows through the evaporator 4 and is thereby cooled. The humid air condenses. The condensate water is collected in the first collection tank 6. The dashed arrow shows how the condensate water flows from the evaporator 4 to the first collection container 6 .
  • the flowing air not only removes moisture from the laundry.
  • the air also removes fluff from the laundry. If a large amount of fluff is deposited on the evaporator 4 or the condenser 5, the process air flow is reduced, as a result of which the heat pump process can no longer be operated optimally.
  • the humid air can only be cooled with difficulty at the evaporator 4 and can therefore only be dried with difficulty. For this reason, the deposition of lint on the evaporator 4 and the condenser 5 must be prevented.
  • the household tumble dryer according to 1 comprises only a single filter stage. This reduces the maintenance effort compared to classic tumble dryers. However, since the only filter stage does not work perfectly, fluff is primarily deposited on the evaporator 4, but also on the condenser 5. Evaporator 4 and condenser 5 must therefore be cleaned regularly.
  • a cleaning system is provided for this cleaning. This transports the condensate water collected in the first collecting container 6 via the pump line 8 to the feed line 9. The condensate water is conveyed from the feed line 9 to the evaporator 4 and the condenser 5 in order to wash them off.
  • the feed line 9 extends from above the evaporator 4 to the top of the drum 2 .
  • the supply line 9 thus also extends above the axis of rotation 21.
  • the supply line 9 is over 40 cm long and extends over a significant part of the overall height of the household tumble dryer.
  • an opening mechanism 10 (illustrated in more detail in 2 and figure 5 ) arranged, which has a first opening 101 and a second opening 102.
  • the openings 101 and 102 have flaps 103 and 104 with which the openings 101 and 102 can be opened and closed.
  • condensate water can be backed up inside the feed line 9. Since the feed line 9 is designed to be correspondingly high, a correspondingly high hydrostatic pressure is produced at the openings 101 and 102 .
  • a high hydrostatic pressure has the advantage that the backed-up condensate water flows in surges over the evaporator 4 as soon as the openings 101 and 102 are opened. Thereby, the lint deposited on the evaporator 4 and the condenser 5 can be washed off effectively.
  • the 2 shows the opening mechanism 10 arranged above the evaporator 4 and condenser 5 and the feed line 9 in a three-dimensional view. Also visible is the pump line 8, via which condensate water is pumped from the first collection container 6 to the supply line 9. An overflow line 11 is also arranged directly next to the supply line. As soon as the supply line 9 is completely filled with condensate water, the excess condensate water runs through the overflow line 11 into the drain.
  • the feed line 9 has a significantly larger tube profile.
  • the large tube profile enables the largest possible amount of condensate water to be dammed up in the supply line 9 .
  • the feed line has a shoe shape. This shoe shape extends over the entire width of evaporator 4 and condenser 5. In 3 this shoe shape 3a is more visible.
  • the opening mechanism 10 includes an actuator 105 which can open and close the flaps 103 and 104 via connecting elements 106 .
  • FIG. 3 shows the device according to 2 with view from above. Shown are the feed line 9, the lower end 91 of the feed line 9 in the shape of a shoe and the flaps 103 and 104.
  • the flaps extend in their length L (marked with the double file) over the entire width of the evaporator 4 arranged below the opening mechanism 10 and of the Condenser 5.
  • the shoe shape of the lower end 91 of the supply line 9 distributes the condensate water over the entire length L.
  • the closed flaps 103 and 104 thus accumulate condensate water over their entire width.
  • FIG 4 shows a section through the in 3 device shown.
  • the cutting line is in 3 marked with the letter A. Visible are the inner areas of the pump line 8, the supply line 9 and the overflow line 11.
  • the overflow line 11 begins at the upper end of the supply line 9, which is why the supply line 9 can accumulate condensate water up to its upper end.
  • figure 5 shows a section through the opening mechanism 10 and through the lower end 91 of the supply line 9.
  • the section line is in 3 marked with the letter B.
  • the dashed arrows show the air flow.
  • the air flows through the lint filter 12, the evaporator 4 and the condenser 5.
  • the other arrows show the flow of condensate water.
  • Condensate water separated in the evaporator flows into the first collection container 6. From there, the condensate water is pumped into the supply line 9 and accumulated behind the flaps 103 and 104. If the flaps 103 and 104 are opened, it flows the condensate water through the first opening 101 and then over the front surface of the evaporator 4 or through the second opening 102 and then over the front surface of the condenser 5.
  • the first opening 101 is arranged directly above the front face 41 of the evaporator 4 .
  • the second opening 101 is arranged immediately above the front face 51 of the condenser 5 .
  • the supply line 9 comprises two partial lines 92 and 93, which lead the condensate water to the openings 101 and 102, respectively.
  • the front surface 41 is arranged centrally below the first opening 101, so that the front surface 41 is very effectively washed off when there is a flow vertically downwards.
  • the first opening 101 and the second opening 102 are designed as an elongated gap.
  • the gap or openings 101 and 102 and also the respective flaps 103 and 104 extend over the length L as shown in FIG 3 is drawn.
  • the length L corresponds to the entire width of the evaporator 4 and the condenser 5.
  • a cleaning process runs as follows.
  • the condensate water separated at the evaporator 4 and collected in the first collection container 6 is transported via the pump line 8 into the feed line 9 .
  • the flaps 103 and 104 are closed.
  • the condensate accumulates in the supply line 9.
  • the control of the household tumble dryer opens the second flap 104 abruptly. Condensate water flows through the second opening 102 onto the front surface of the condenser. In this case, the condensate water is only slightly contaminated with fluff because basically only a small amount of fluff is deposited on the front surface 51 of the condenser 5 . The condensate water, which is only slightly contaminated with fluff, is returned to the collection container 6 collected and pumped again via the pump line 8 into the feed line 9.
  • the controller suddenly opens the first flap 103 and the condensate water flows through the first opening 101 over the front surface 41 of the evaporator 4.
  • the condensate water which is now heavily contaminated with fluff, is collected in the second collection container 7 and then pumped the drain.
  • the flaps 103 and 104 are opened abruptly. As a result, the accumulated condensate flows in surges over the front surfaces 41 and 51.
  • a filling opening 13 (shown in Fig 1 ) be provided, through which the user can fill water into the first collection container 6.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP21192536.7A 2021-08-23 2021-08-23 Sèche-linge doté d'un système de nettoyage à échangeur de chaleur Pending EP4141163A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21192536.7A EP4141163A1 (fr) 2021-08-23 2021-08-23 Sèche-linge doté d'un système de nettoyage à échangeur de chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21192536.7A EP4141163A1 (fr) 2021-08-23 2021-08-23 Sèche-linge doté d'un système de nettoyage à échangeur de chaleur

Publications (1)

Publication Number Publication Date
EP4141163A1 true EP4141163A1 (fr) 2023-03-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21192536.7A Pending EP4141163A1 (fr) 2021-08-23 2021-08-23 Sèche-linge doté d'un système de nettoyage à échangeur de chaleur

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EP (1) EP4141163A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018469A1 (de) * 2006-04-19 2007-10-25 Lare Luft- und Kältetechnik Apparate und Regelsysteme GmbH Temperatur- und Druckausgleich von Wärmetauschern in Wäschetrocknern und ähnlichen Wärmepumpensystemen
FR3011254A1 (fr) * 2013-10-02 2015-04-03 Fagorbrandt Sas Appareil de sechage du linge comprenant un dispositif de nettoyage d'au moins un element a nettoyer au moyen d'un liquide de nettoyage
US20160083894A1 (en) * 2013-04-17 2016-03-24 Electrolux Appliances Aktiebolag Laundry Dryer
EP3147404A1 (fr) * 2017-01-16 2017-03-29 V-Zug AG Sèche-linge ayant une alimentation en eau

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018469A1 (de) * 2006-04-19 2007-10-25 Lare Luft- und Kältetechnik Apparate und Regelsysteme GmbH Temperatur- und Druckausgleich von Wärmetauschern in Wäschetrocknern und ähnlichen Wärmepumpensystemen
US20160083894A1 (en) * 2013-04-17 2016-03-24 Electrolux Appliances Aktiebolag Laundry Dryer
FR3011254A1 (fr) * 2013-10-02 2015-04-03 Fagorbrandt Sas Appareil de sechage du linge comprenant un dispositif de nettoyage d'au moins un element a nettoyer au moyen d'un liquide de nettoyage
EP3147404A1 (fr) * 2017-01-16 2017-03-29 V-Zug AG Sèche-linge ayant une alimentation en eau

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