EP2744935B1 - Hausgerät, wie waschmaschine, mit strömung von flüssigkeit, wie waschlauge, an einem rohrheizkörper - Google Patents

Hausgerät, wie waschmaschine, mit strömung von flüssigkeit, wie waschlauge, an einem rohrheizkörper Download PDF

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Publication number
EP2744935B1
EP2744935B1 EP12743749.9A EP12743749A EP2744935B1 EP 2744935 B1 EP2744935 B1 EP 2744935B1 EP 12743749 A EP12743749 A EP 12743749A EP 2744935 B1 EP2744935 B1 EP 2744935B1
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EP
European Patent Office
Prior art keywords
flow
tub
influencing
region
household appliance
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.)
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Application number
EP12743749.9A
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German (de)
English (en)
French (fr)
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EP2744935A1 (de
Inventor
Bert Peters
Holger Reichner
Oliver SCHÖNE
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.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL12743749T priority Critical patent/PL2744935T3/pl
Publication of EP2744935A1 publication Critical patent/EP2744935A1/de
Application granted granted Critical
Publication of EP2744935B1 publication Critical patent/EP2744935B1/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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating arrangements

Definitions

  • the invention relates to a domestic appliance in a preferred embodiment as a washing machine, washer dryer comprising the further features of the preamble of claim 1, a flow of a liquid, such as wash liquor, occurring during a washing process on a tubular heating element.
  • a tubular heater with individual heating pipes is the most frequently used type of heating in a domestic appliance, such as a washing machine or washer-dryer, in order to heat the washing liquor to a suitable temperature in a particular phase of the operation of the washing machine so that the detergent dissolved in the liquor is suitable Can have an effect.
  • a domestic appliance such as a washing machine or washer-dryer
  • the laundry placed in a washing drum also has an effect on the movement acting on it, usually through a reversing movement of the washing drum in order to achieve an optimal cleaning result.
  • the tubular heater is housed in a washing machine with a substantially horizontally aligned axis of the washing drum below the washing drum but still inside a tub, which almost completely surrounds the washing drum, suitable and known fixing means for the tubular heater including its individual heating pipes being provided.
  • suitable and known fixing means for the tubular heater including its individual heating pipes being provided.
  • the distance between the respective walls of the suds container in relation to the washing drum is kept very small so that the suds enclosed by the suds container are essentially inside the washing drum with its perforated drum casing.
  • an exception must be made at the bottom of the tub, where the fixed tubular heater is located, in order to meet the space requirements of the tubular heater and for at least the same amount of liquid surrounding it, such as wash liquor.
  • This space surrounding the tubular heating element within the tub is also referred to as a heating element pocket, such a heating element pocket often having an asymmetrical structure.
  • a heating element pocket such a heating element pocket often having an asymmetrical structure.
  • a washing machine comprising a tubular heater, which has a structure corresponding to the above description, is for example from DE 44 35 095 A1 known.
  • EP 1 857 584 A2 discloses a laundry treatment machine which comprises a tub, a laundry drum rotatably mounted therein and a plate heat exchanger.
  • the plate heat exchanger is located in the area of the floor and is used to heat the liquid.
  • a flap is arranged on the tub to allow liquid to flow past the heat exchanger in the washing mode and air in the drying mode.
  • the tubular heating element calcifies and lint often accumulates in the space surrounding the tubular heating element, which can pass through the drum holes at high speeds during washing operations, as well as reversing washing operations. These lint cannot be completely removed from this space during the washing-out of wash liquor, since a certain minimum volume of caustic must always remain in the space surrounding the tubular heating element.
  • the tubular heater does not only have an undesirable calcification, but also lint remains on the tubular heater with its heating pipes or lint deposits around the tubular heater, so that its efficiency and service life decrease.
  • the object of the invention is therefore to provide a solution in relation to the area of the tubular heater and its heating pipes in a known domestic appliance such as a washing machine and washer dryer, after which the calcification in question and the lint deposition are avoided as far as possible.
  • a washing drum which can be rotated about an essentially horizontally oriented axis and which is located in a tub which surrounds the washing drum essentially on all sides, with reference to a region between one in the circumferential direction extending jacket of the drum and a bottom wall of the tub, which is to be regarded as the bottom, there is a tubular heating element with heating tubes, the tubular heating element being surrounded by a liquid, such as wash liquor, at least when the domestic appliance is in operation, this liquid preferably being predetermined by the tubular heating element in a predetermined manner
  • Operating phases can be heated, and a flow in the liquid is formed and, in some cases, a radiant panel can be used between the tubular heating element and the bottom of the tub.
  • At least one flow-influencing region is formed between the tubular heating element and the bottom of the tub, which is designed such that it blocks part of the flow of the liquid in an area under the heating pipes and in an area in which the heating pipes are diverted, at least one area influencing the flow being formed on the bottom of the tub or on a radiant panel which is inserted between the tubular heating element and the bottom of the tub.
  • the design of the radiant sheet according to the invention also means that the heating pipes can be flowed through with a total flow with increased flow speed. This means that the flow velocity of the liquid, such as lye, is increased compared to a situation without the design of the radiant sheet according to the invention. With increased wall shear stress between the alkali and the heating surface, the fluff and lime particles can be torn away or their deposition can be prevented.
  • the radiant sheet in the sense of the invention, it has proven to be advantageous that the radiant sheet has at least one flow-influencing region in the immediate vicinity of at least one of the heating pipes.
  • a more specific further development in the sense of the invention consists in that on both sides of a hypothetical line of symmetry, which can be aligned in particular parallel to the axis of rotation of the drum, the radiant panel has the areas influencing the flow.
  • the at least one flow-influencing region of the radiant sheet has a fold, such as in particular with the formation of a triangular cross section.
  • the at least one flow-influencing area of the radiant sheet has a raised edge.
  • the at least one flow-influencing region of the radiant sheet has a deep-drawing.
  • the radiant panel as such can be detachably or non-detachably connected to the tub at the bottom area thereof. If a tub is made of plastic, the radiant panel can be added during its manufacturing process, such as injection molding, for an inseparable connection to the tub.
  • the invention also includes the fact that it is not necessary to use a separate radiant panel. The effects of a radiant sheet must then be simulated.
  • the bottom of this tub made of plastic should have a flow-influencing geometry, as can be achieved with a separately constructed radiant panel, preferably the plastic in the area of the replicated radiant panel is a high-temperature-resistant plastic.
  • the latter measure is intended to ensure that the heat radiation, which can otherwise be oriented in a suitable manner so as not to damage the plastic of conventional design, now withstands this thermal load.
  • the bottom of the suds container should have a flow-influencing geometry, as can also be achieved with a separately constructed jet plate.
  • the geometry influencing the flow in the bottom of this tub includes that at least one area affecting the flow is provided in the immediate vicinity of at least one of the heating pipes.
  • the flow-influencing regions can be formed on both sides of a hypothetical line of symmetry in the base of the tub, these regions having a configuration similar to that of alternative designs of a separately configured radiant sheet.
  • it has to be taken into account, which is a certain limitation that no shape may be used in which an inadmissible opening of the tub made of metallic material would occur. In the event of a fault, however, no problems are to be expected with regard to the thermal radiation of a tubular heater and of its heating pipes.
  • Fig. 1 are already entered in an essential sectional view of a household appliance, such as a washing machine, all the parts from which the invention is based.
  • a washing drum 2 can thus be rotated about an essentially horizontally oriented axis 1 of the washing drum 2.
  • a jacket 4 of the washing drum 2 is at a radius R from this center of rotation or axis 1.
  • the axis of rotation is oriented essentially perpendicular to the plane of the drawing.
  • the washing drum 2 is essentially surrounded on all sides by a tub 3 which can hold a liquid, such as washing liquor 8. Since the Fig.
  • Fig. 1 is directed to the most important features of the invention, it is dispensed with the proportion of the wash liquor, which is located within the washing drum 2, with.
  • the main focus is on an area 6, which is located between the circumferentially extending jacket 4 of the washing drum 2 and a bottom wall 5 of the tub 3 to be regarded as the bottom 5.
  • this area 6 there is a tubular heating element with heating pipes 7 and 7 ', the tubular heating element with heating pipes 7 and 7' being surrounded by the previously named liquid, such as wash liquor 8, when the domestic appliance is operating here.
  • This liquid, such as lye is operated by the tubular heater with its heating tubes 7 and 7 ', as in predetermined operating phases. heated up.
  • a flow 9 forms in the liquid 8, which is initially represented by a large number of arrows.
  • a radiant panel 10 is used, which is initially used during the operation of the radiator with the heating tubes 7 and 7' to radiate heat radiated from the tub, in particular the bottom 5 keep the tub 3 away, especially since it is usually economical to make the tub from plastic, which can be sensitive to heat.
  • the Fig. 1 also shows one of several drivers 11, which are located on the inside of the drum shell 4 of the laundry drum 2.
  • Arrows 12 are entered in relation to the driver shown, which show the direction in which items of laundry placed in the laundry drum and the soapy water taken up are transported during operation of the washing machine. It can be seen that the flow 9 is directed opposite to the transport direction 12.
  • the carrier 11 By transporting the laundry via the carriers 11, the latter is constantly raised and possibly falls back again, depending on the rotational speed which the washing drum 2 is taking up.
  • the wash liquor is scooped by the movement of the laundry and the driver, which then emerges again from the drum and flows back in the gap between the tub shell and the drum, which causes the flow 9 of the wash liquor 8, which Fig. 1 illustrated.
  • pipes 7 and 7 'of the tubular heating element calcify and lint often accumulates in the space or area 5 surrounding the tubular heating element, which fluff away from the laundry when the laundry is moved vigorously during washing operations detach and step out through the drainage holes of the washing drum.
  • These lint can combine with the lime released from the wash liquor, especially at higher temperatures, and can be deposited in very stable layers on the heating pipe of the radiator.
  • the concentration of fluff, especially in area 5 is also favored by the fact that fluff cannot be completely removed from area 5 when washing liquor 8 is being pumped out.
  • the lime and lint composite material accumulating on the heating pipe can lead to heat build-up during operation of the tubular heating element, reduce efficiency and reduce its service life.
  • the radiant panel 10 is to be structured such that part of the flow 9 of the liquid 8 is to be blocked in an area 13 and 13 'under the heating pipes 7 and 7' and in an area , in which the heating pipes are located, must be diverted.
  • the Fig. 1 already a distribution of the flow 9, which was achieved with the measure according to the invention.
  • the special design of the radiant sheet 10 also means that the heating pipes 7 and 7 'can be flowed around with a total flow 9 with increased flow speed, to which the narrowed areas 13 and 13' contribute and which can also be explained after taking into account the relevant flow laws after the invention was created .
  • the radiant panel 10 In order to achieve the narrowed areas 13 and 13 ', it is necessary for the radiant panel 10 to have at least one flow-influencing area 14 and 14' in the immediate vicinity of at least one of the heating pipes 7 and 7 '.
  • a radiant panel is designated 20.
  • Flow-influencing regions are provided which are formed by a respective unfolding 24 and 24 '.
  • an almost triangular cross section is achieved, which is the representation of the radiant sheet 10 with the flow-influencing regions 14 and 14 'of the Fig. 1 can be assigned in an easily recognizable manner.
  • the radiant panel 20 is shown only in the area that is important in the context of the invention with regard to its design becomes. Otherwise, it can be detachably connected to the bottom 5 of the layer container 3, such as by a screw connection or permanently, such as by riveting or gluing.
  • tub 3 is made of plastic and there is an inseparable connection to the tub, it is also possible to connect the radiant panel 10 or 20 of the tub 3 in one manufacturing process, for example by injection molding. The plastic area of the tub then holds the radiant panel through adhesive forces.
  • a radiant panel is designated 30. Areas influencing the flow are provided which are formed by a respective upstand 34 and 34 'of the radiant sheet. When using this radiant sheet on the bottom 5 of the tub 3, a sharp transition is achieved, which leads to a locally very strong flow at a very high speed. The blasting off and the removal of lime particles and fluff is greatly promoted.
  • the radiant panel 30 is only shown with regard to its design in the area that is important in the context of the invention. The possible mounting options are the same as for 2 a) described.
  • a radiant panel is designated 40.
  • Flow-influencing regions are provided which are formed by a respective deep drawing 44 and 44 ', that is to say as a result by deep drawing.
  • the flow-influencing region can be formed by a respective bead. This is accompanied by a favorable shape for influencing the flow in the sense of the invention, so that the blasting off and the removal of lime particles and fluff can also be achieved to the desired extent.
  • the radiant panel 40 is shown with respect to its design only in the area important within the scope of the invention. The possible mounting options are the same as for 2 a) described.
  • the exemplary embodiments described can also be implemented in that a radiant panel is not used as such. Then the bottom 5 of the tub 3 must have a flow-influencing geometry which is equivalent to that used with the radiant sheet, for example in the configurations according to FIG 2 a) to 2 c) equals. It is possible to design the tub from plastic or from metallic material or from sheet metal. Will plastic as Starting material selected, the plastic material should be changed in the area of the heating pipes so that the thermal radiation emitted by the heating pipes in the event of a fault does not lead to serious functional damage to the plastic material of the tub.
  • the simulation of a shape is similar to the variants of 2 a) to 2 c) make sure that no breaks or passages are formed in the base 5 of the tub. It is therefore the choice of the material of the tub to match the shaping options in order to achieve an optimal flow-influencing geometry.
  • the flow-influencing region 14, 14 'described in all the embodiments of the invention or the flow-influencing structure present with it can extend over the entire length or also over part lengths of the tubular heating element with the heating tubes 7 and 7', in particular in this regard should arrive that areas of the tubular heating element that are particularly at risk of calcification are taken into account.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP12743749.9A 2011-08-16 2012-08-08 Hausgerät, wie waschmaschine, mit strömung von flüssigkeit, wie waschlauge, an einem rohrheizkörper Active EP2744935B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12743749T PL2744935T3 (pl) 2011-08-16 2012-08-08 Urządzenie gospodarstwa domowego, jak pralka, z przepływem płynu, jak środek myjący, przez cylindryczny korpus grzewczy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011081019.6A DE102011081019B4 (de) 2011-08-16 2011-08-16 Hausgerät, wie Waschmaschine, mit Strömung von Flüssigkeit, wie Waschlauge, an einem Rohrheizkörper
PCT/EP2012/065538 WO2013023973A1 (de) 2011-08-16 2012-08-08 Hausgerät, wie waschmaschine, mit strömung von flüssigkeit, wie waschlauge, an einem rohrheizkörper

Publications (2)

Publication Number Publication Date
EP2744935A1 EP2744935A1 (de) 2014-06-25
EP2744935B1 true EP2744935B1 (de) 2020-07-22

Family

ID=46634163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12743749.9A Active EP2744935B1 (de) 2011-08-16 2012-08-08 Hausgerät, wie waschmaschine, mit strömung von flüssigkeit, wie waschlauge, an einem rohrheizkörper

Country Status (6)

Country Link
EP (1) EP2744935B1 (pl)
CN (1) CN103732821B (pl)
DE (1) DE102011081019B4 (pl)
PL (1) PL2744935T3 (pl)
RU (1) RU2568793C2 (pl)
WO (1) WO2013023973A1 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014208514A1 (de) 2014-05-07 2015-11-12 BSH Hausgeräte GmbH Wäschebehandlungsgerät mit Induktionsheizung
CN110485113A (zh) * 2018-05-15 2019-11-22 青岛海尔滚筒洗衣机有限公司 一种外筒及洗衣机
CN110485112A (zh) * 2018-05-15 2019-11-22 青岛海尔滚筒洗衣机有限公司 一种外筒及洗衣机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7023740U (de) 1971-11-25 Siemens-Electrogeraete Gmbh Trommelwaschmaschine mit einer Vorrichtung zum Trocknen der Wäsche
DE8421379U1 (de) * 1984-07-17 1984-10-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Waschmaschine
DE4024559A1 (de) * 1990-08-02 1992-02-06 Miele & Cie Elektrisch beheizter durchlauferhitzer fuer geschirrspuelmaschinen und waschmaschinen
DE4435095C2 (de) * 1994-09-30 1998-04-09 Aeg Hausgeraete Gmbh Waschmaschine mit einem kreisförmigen Laugenbehälter
DE19844568C1 (de) * 1998-09-29 1999-10-21 Miele & Cie Befestigungsvorrichtung für elektrische Rohrkörper von Trommelwaschmaschinen
JP4423956B2 (ja) * 2003-12-10 2010-03-03 パナソニック株式会社 熱交換器およびそれを備えた衛生洗浄装置
JP4682703B2 (ja) * 2005-05-30 2011-05-11 パナソニック株式会社 洗浄装置
DE102006023389A1 (de) * 2006-05-17 2007-11-22 Herbert Kannegiesser Gmbh Verfahren und Vorrichtung zum Behandeln, vorzugsweise Waschen, Schleudern und/oder Trocknen, von Wäsche

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
RU2014106051A (ru) 2015-09-27
WO2013023973A1 (de) 2013-02-21
PL2744935T3 (pl) 2020-12-28
DE102011081019A1 (de) 2013-02-21
EP2744935A1 (de) 2014-06-25
DE102011081019B4 (de) 2020-12-10
RU2568793C2 (ru) 2015-11-20
CN103732821A (zh) 2014-04-16
CN103732821B (zh) 2016-09-28

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