EP3146883B1 - Lave-vaisselle, notamment lave-vaisselle ménager - Google Patents

Lave-vaisselle, notamment lave-vaisselle ménager Download PDF

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Publication number
EP3146883B1
EP3146883B1 EP16188694.0A EP16188694A EP3146883B1 EP 3146883 B1 EP3146883 B1 EP 3146883B1 EP 16188694 A EP16188694 A EP 16188694A EP 3146883 B1 EP3146883 B1 EP 3146883B1
Authority
EP
European Patent Office
Prior art keywords
pipe
wave
pipeline
fresh water
dishwasher
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
EP16188694.0A
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German (de)
English (en)
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EP3146883A1 (fr
Inventor
Eugen Sgurski
Florian Dees
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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.)
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Publication date
Priority claimed from DE102015116248.2A external-priority patent/DE102015116248B3/de
Application filed by Miele und Cie KG filed Critical Miele und Cie KG
Publication of EP3146883A1 publication Critical patent/EP3146883A1/fr
Application granted granted Critical
Publication of EP3146883B1 publication Critical patent/EP3146883B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4291—Recovery arrangements, e.g. for the recovery of energy or water

Definitions

  • the invention relates to a dishwasher, in particular in the embodiment as a domestic dishwasher, with a washing compartment providing a washing compartment, which serves to receive items to be cleaned, with a sump adjacent fresh water tank and at least partially passed through the fresh water tank pipe formed as a wave pipe and is fluidly connected to both the input side and the output side to the washing compartment.
  • Dishwashers in general and household dishwashers in particular are well known in the prior art, so it does not require a separate documentary evidence at this point.
  • Generic dishwashers typically have a rinse container that provides a rinse compartment. This is the user side accessible via a feed opening, which is fluid-tightly closed by means of a pivotally mounted flushing door.
  • the washing container serves to receive items to be cleaned, which may be dishes, cutlery pieces and / or the like, for example.
  • the dishwasher For loading of items to be cleaned with rinsing liquid, the so-called rinsing liquor, the dishwasher has a spray device in the interior of the washing container.
  • This spraying device generally provides rotatably mounted spray arms, with typically two or three such spray arms being provided.
  • a loading of the items to be cleaned with rinse liquor by means of rotating spray arms.
  • the rinsing solution dispensed by the spray collects in a collecting pot of the washing. This is connected to a circulation pump on the one hand and to a drain pump on the other.
  • the circulating pump which circulates the rinsing liquid conveyed into the dishwasher in the intended use case, serves to pressurize the spraying device with rinsing solution.
  • the construction after the EP 2 543 305 A1 provides a drain pipe for the discharge of waste water, which is passed through the fresh water tank. After completing a washing program, the rinsing liquor, which is no longer required, is pumped off as waste water and guided through the drainage pipe arranged in the fresh water tank. It can thus come to a heat transfer from still comparatively warm wastewater to the still comparatively cold fresh water.
  • the drainage pipe is designed to achieve the largest possible heat transfer surface as a wave pipe.
  • Another device for the recovery of heat energy is from the DE 39 01 169 A1 known.
  • a pipe is laid by a sump adjacent to the fresh water tank, which is connected to the feed with rinsing water to a circulation pump.
  • the pipeline is arranged meandering running within the fresh water tank.
  • a heat transfer device which includes, inter alia, a heat pump and / or a thermoelectric generator, which allows waste water to extract heat in order to transfer this to run in a closed Frischwasserumcielznikank fresh water.
  • the invention proposes a dishwasher of the type mentioned above, which is characterized in that the shaft pipe provides an at least partially extending in the tube longitudinal direction and adjacent wave crests aerodynamically interconnecting air duct, and / or that the shaft pipe in the pipe longitudinal direction at least partially over a partial area in the circumferential direction is formed wave-free, and / or that the shaft pipe has an at least partially helically extending around an axis in the tube longitudinal direction wave contour.
  • the pipeline In order to increase the heat transfer area provided by the pipeline for the purpose of increased efficiency, it is known from the prior art to form the pipeline as a shaft pipeline.
  • the lateral surface of the pipe is formed corrugated in the tube longitudinal direction, thus has waves which are rotationally symmetrical about a pipe axis extending in the tube axis, so that wave peaks and troughs alternate each other in the tube longitudinal direction.
  • the provided by the pipe pipe surface can thus be significantly increased in contrast to a wave-free pipeline, which allows for faster use of heat transfer and higher efficiency in the intended use case.
  • a first disadvantage is that air bubbles located in the interior of the pipeline can settle on the inside of the convex wave crests. As a result, an insulating cushion is formed between the rinsing liquid passed through the wave pipe, on the one hand, and the surface of the pipe in the region of the wave crests, on the other hand. As a result of such bubble setting, the efficiency of heat transfer decreases as well as the rate at which heat transfer occurs so that the effect of improved heat transfer actually achieved with the wave tube design does not occur or only greatly diminishes.
  • the problem of bubble accumulation in the wave crests of the wave pipeline particularly occurs when the wave pipeline in the fresh water tank laid meandering. This is because each meander at least partially extends at least partially horizontally. Even in the case of a feed of the pipeline with flushing liquid, air in the pipeline remains in the wave crests of these meandering sections extending essentially horizontally. This is because rinsing fluid introduced into the pipeline depresses the pipeline from below into the wave crests, but the air stored there can not escape. As a result, the air bubbles are trapped in the wave crests and form a heat transfer dissipative isolation between the rinsing liquid and the tube surface.
  • the shaft pipeline provides an air duct which connects in fluid communication with one another in the tube longitudinal direction and adjacent wave crests. It is thus advantageously allowed that any air bubbles located in the wave crests can flow out in the case of charging, through the air duct, which connects flow-wise in the tube longitudinal direction adjacent wave crests.
  • the pipeline including the air duct provided by it completely fills with rinsing liquid, so that heat insulation is completely avoided by remaining air bubbles, which allows a fast heat transfer at the same time high efficiency in the intended use case.
  • the inventively provided air duct allows it therefore completely remove residual air located in the pipeline during operation, whereby the entire provided by the shaft pipe heat transfer surface is available.
  • the construction of the invention provides improved reliability, and this without additional design effort.
  • the wave-shaped configuration of the pipeline brings, in particular with a meandering installation of the pipeline, the further disadvantage that impurities can accumulate in the sections of the wave peaks pointing downwards in the vertical direction.
  • This disadvantage has an effect, in particular, on substantially horizontally extending meandering sections.
  • the clogging of the wave crests with impurities is disadvantageous for two reasons. On the one hand it can lead to an unwanted contamination of the pipe come passed rinsing liquid. This has a disadvantageous effect, in particular, when the rinsing liquor passed through the pipeline is to be used even further in subsequent rinsing programs.
  • the shaft pipe is formed in the tube longitudinal direction at least in sections over a portion of the circumferential direction wave-free.
  • the corrugated pipe is thus formed wave-free in the vulnerable to the accumulation of contaminants portions.
  • “Wave-free” means a tubular jacket surface, which is designed to be substantially smooth at least on the inside, but preferably both on the inside and on the outside. Although the smooth design of the tubular jacket surface leads to a reduction in the total available heat transfer area in the corresponding subregions, this disadvantage is more than offset by the advantage that the adhesion of impurities with the result of the formation of an insulating layer is avoided.
  • the undulating portion is formed by the waves in these parts expire, that is, go over into the lateral surface without formation of wave crests and troughs. It is created in this way a lying in the circumferential direction portion which is wave-free, therefore smooth.
  • this undulating partial region preferably extends at least in sections over a longer section in the tube longitudinal direction.
  • the undulating portion in the circumferential direction and the air duct are formed opposite to each other.
  • the air duct is typically formed on an upper pipe wall in the installation position of the shaft pipe, whereas the undulating portion is located on a lower pipe wall of the shaft pipe in the installed position.
  • the arrangement of the air duct on a top pipe wall in installation position is due to the fact that air bubbles settle above the liquid level of a rinsing liquid passed through the pipe.
  • contamination sinks downwards following the gravitational force and will therefore prefer to settle on the inside of the lower pipe wall in the installation position. It is expedient to equip the lower pipe wall in the installation position with shaft-free subregions according to the invention.
  • the corrugated pipe has a wave contour that extends at least in sections helically about an axis in the pipe longitudinal direction. Accordingly, the waves in their wave contour are not rotationally symmetrical, but helical, i. on a helical helix.
  • This particular embodiment has the advantage that flushing liquid introduced into the shaft pipeline is set into a vortex movement, in correspondence with the helical wave contour, into a vortex movement about a tube axis extending in the tube longitudinal direction.
  • any adhesions, soiling and / or the like located on the inside of the shaft tube in the wave crests are entrained and rinsed out.
  • the helical wave contour thus ensures that the thus caused vortex movement of the introduced rinse liquid leads to a kind of self-cleaning.
  • the corrugated pipe is arranged meandering at least in sections within the fresh water tank, with the individual meanders each having meander limbs which are inclined to the horizontal.
  • the waves of the shaft pipeline may be rotationally symmetrical about a tube axis extending in the tube axis.
  • the corrugated pipe has a wave contour that extends at least in sections helically about an axis in the pipe longitudinal direction. Accordingly, the waves in their wave contour are not rotationally symmetrical, but wave-shaped, that is, on a helix-type helix.
  • FIG. 1 can be seen in a purely schematic representation of a dishwasher 1 according to the invention.
  • This has, in a manner known per se, a rinsing container 2 which provides a rinsing chamber 3.
  • a rinsing container 2 which provides a rinsing chamber 3.
  • spray arms 7 are arranged, which are fluidly connected via lines 8 to a circulating pump 5.
  • the flushing chamber 3 opens into a collecting pot 4, which is fluidically connected both to the circulating pump 5 and to a sewage pump 6.
  • the dishwasher 1 further has a known from the prior art per se water inlet pocket 9. This is connected to a water connection 10.
  • the water inlet pocket 9 provides a conduit 12 which, starting from the water connection 10 with the interposition of an impeller 11 and a resin container 13, is connected to a valve 14.
  • This valve 14 connects the line 12 selectively either with the opening into the collecting pot 4 line 15 or with the leading to a fresh water tank 17 line 16th
  • the fresh water tank 17 is juxtaposed to the washing compartment 2. He is the input side connected to the water inlet 10 leading line 16. On the output side, the fresh water tank 17 is connected by means of the line 18 to the collecting pot 4.
  • the line 18 can be selectively opened or closed by means of a valve 19, which may be formed as a solenoid valve, for example.
  • the fresh water tank 17 has an overflow 20. This is connected to a line 21 which is guided through an opening 22 in the washing compartment 2 in the washing compartment 3.
  • a pipe 23 is laid. This is the input side connected to the line 24, which in turn leads to the circulating pump 5. On the output side, the pipe 23 is connected to a line 25 through the Opening 22 in the washing compartment 2 is guided in the washing compartment 3.
  • the rinsing water gives off energy in the form of heat when flowing through the pipeline 23 to the fresh water present in the fresh water tank 17.
  • equipped with the pipe 23 fresh water tank 17 is a heat exchanger.
  • the fresh water tank 17 Upon completion of a wash program, the fresh water tank 17 is filled with fresh water. This can warm up to room temperature and is ready for a subsequent washing program.
  • valve 19 is opened and the preheated to room temperature fresh water flows by gravity into the sump 4 of the dishwasher 1 a. If necessary, additional fresh water can be supplied to the collecting pot 4 via the water connection 10 by means of the lines 12 and 15. As soon as the total required amount of fresh water in the collecting pot 4 is available, the actual washing program starts with the first program step.
  • the pipe 23 is routed within the fresh water tank 17, so that it comes in a flow of rinsing water to a heat transfer to the fresh water tank 17 located in the fresh water.
  • the rinsing liquor After flowing through the pipes, the rinsing liquor returns to the washing container 2, where they are in Collection pot 4 again accumulates and is repeatedly guided by the circulation pump 5 through the pipes 24, 23 and 25. This circulation operation is maintained for a predefinable period of time or until the temperature of the rinse liquor drops to a predeterminable temperature.
  • the rinsing liquor contained in the collecting pot 4 is discarded as waste water, for which purpose the wastewater pump 6 is turned on.
  • the next rinsing program step can begin, for which purpose the valve 19 is opened.
  • the preheated fresh water located in the fresh water tank 17 flows via the line 18 into the collecting pot 4. If necessary, further fresh water can be supplied via the line 15 from the water connection 10.
  • FIG. 2 can be seen in a schematic side view of a fresh water tank 17 according to the invention.
  • the pipeline 23 is laid meander-shaped within the fresh water tank 17.
  • Each meander 33 provides a first meandering leg 34 and a second meandering leg 35.
  • the meandering legs 34 and 35 are each inclined to the horizontal. The angle of inclination is at least 2 ° in each case. Due to this configuration, depending on the meandering leg 34 or 35, a gradient is obtained, which ensures that rinsing fluid flowing out of the pipeline 23 can completely flow out of the pipeline 23, ie, without residue, following the weight force.
  • the pipe 23 On the input side, the pipe 23 has a connecting piece 26, which is connected in the final assembled state in a flow-tight manner to the pipe 24.
  • the pipe 23 On the output side, the pipe 23 has an outlet 27, which opens in an already described manner through an opening 22 into the provided by the washing compartment 2 2 washing compartment.
  • the pipe 23 has a comparatively large surface, ie heat transfer surface available. It is for this reason provided, the Form pipe 23 as a shaft pipe 23.
  • FIGS. 3 to 20 let recognize different wave configurations, the FIGS. 3 to 8 a first embodiment, the FIGS. 9 to 12 a second embodiment and the FIGS. 13 to 20 relate to a third embodiment.
  • the first embodiment according to the FIGS. 3 to 8 shows a wave contour 36, according to which the waves of the shaft pipe 23 are rotationally symmetrical about a pipe axis extending in the tube 30 longitudinal axis. Wave peaks 28 and wave troughs 29 alternate with each other in the tube longitudinal direction 30.
  • the wave contour 36 according to the first embodiment is characterized in that the wave peaks 28 protrude out of the lateral surface of the pipeline 23 with the same rib shape.
  • the tube shell surface located between two wave crests 28 then forms the wave trough 29 located between these two crests 28. This is particularly clear from the presentation after Fig. 5 ,
  • the second embodiment according to the FIGS. 9 to 12 is designed to be comparable to the first embodiment.
  • a difference, however, is that the respective transition between a wave crest 28 and a wave trough 29 or a wave trough 29 and a wave crest 28 is beveled. This creates a geometrically smooth transition between adjacent wave crests 28 and troughs 29.
  • this geometric configuration results in particular from the illustration Fig. 12 ,
  • the third embodiment according to the FIGS. 13 to 20 shows a wave contour 36, according to which the waves of the shaft pipe 23 are not formed rotationally symmetrical about a tube axis extending in the tube 30 longitudinal axis. Instead, it is provided that the shaft pipeline 23 has a wave contour 36 that extends at least in sections helically about an axis in the tube longitudinal direction 30. Accordingly, the waves in their wave contour 36 are not rotationally symmetrical, but helical, ie on a helix-type helix. In particular, the detail view after Fig. 16 lets recognize this helical wave contour 36.
  • a disadvantage is that air bubbles located inside the pipeline 23 can settle on the inside of the convex wave peaks 28. As a result, an insulating pad is formed between the rinsing liquid passed through the shaft pipe 23 on the one hand and the surface of the pipe 23 in the region of the peaks 28 on the other hand. As a result of such bubble setting, the efficiency of heat transfer decreases as well as the rate at which heat transfer occurs so that the effect of improved heat transfer actually achieved with the wave tube design does not occur or only greatly diminishes.
  • an air duct 31 which serves the vent.
  • the wave pipe 23 provides a ventilation channel 31 which extends at least partially in the pipe longitudinal direction 30 and adjacent wave peaks 28 fluidly interconnected. Residual air in the pipeline 23 can therefore escape and be expelled via the air duct 31 when the rinsing water flows in. As a result, the formation of undesirably remaining in the pipe 23 air cushions can be avoided.
  • the air duct 31 according to the invention is preferably arranged on a meandering upper wall of the at least partially substantially horizontally guided meandering legs 34 and 35, as can be seen from a synopsis in particular Figures 2 . 3 and 8th results.
  • the shaft pipe 23 is formed in the tube longitudinal direction 30 at least in sections over a portion 32 in the circumferential direction 37 wave-free, as in particular the representations of the FIGS. 6 and 7 and 17 show.
  • the shaft-free embodiment in the partial region 32 provides a substantially smooth inner surface of the pipeline 23, which helps prevent the undesired adhesion of contaminants, dirt and / or the like.
  • the pipe 23 is, as this particular Fig. 2 can recognize, arranged meandering within the fresh water tank 17, wherein the individual meanders 33 have substantially horizontally extending meander legs 34 and 35.
  • the air duct 31 is formed on the upper pipe wall in the installation position of the shaft pipe, whereas the undulating portion 32 is located at a lower pipe wall installation position of the shaft pipe 23.
  • the advantages achieved with the formation of an air duct 31 on the one hand and the advantages achieved with a wave-free section 32 on the other hand can be achieved jointly.
  • the arrangement of the air duct 31 is due to a mounting position in the upper pipe wall the fact that settle air bubbles above the liquid level, whereas pollution following the sinking down and therefore preferentially settle on the inside of the lower pipe wall in installation position.
  • helically shaped wave contour 36 provides the additional advantage that flushing liquid introduced into the pipe 23 is caused to swirl, and although in correspondence of the helical wave contour 36 in a vortex movement about an axis extending in the tube longitudinal direction 30 tube axis.
  • any adhesions, soiling and / or the like located on the inside of the shaft pipeline 23 in the wave crests are entrained and flushed out.
  • the helically shaped wave contour 36 preferably also has, in the manner already described above, an air duct 31 or a wave-free partial region 32 at the corresponding locations.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (5)

  1. Lave-vaisselle, en particulier lave-vaisselle ménager, avec une cuve de rinçage (2), laquelle met à disposition une chambre de rinçage (3) et laquelle sert à la réception des articles à laver, avec une cuve à eau propre (17), laquelle est disposée à côté de la cuve de rinçage (2), ainsi qu'avec une canalisation (23), laquelle est guidée à travers la cuve à eau propre (17), tout au moins par sections, et laquelle est conçue sous la forme d'une canalisation à tube ondulé, et laquelle est raccordée à la cuve de rinçage (2), aussi bien du côté de l'entrée que du côté de la sortie, selon la technique des fluides ;
    caractérisé en ce que la canalisation à tube ondulé (23) met à disposition un canal d'amenée d'air (31) qui raccorde les uns aux autres, selon la technique des fluides, des sommets d'ondulations (28) contigus, et qui s'étend, tout au moins par sections, dans la direction longitudinale (30) du tuyau ; et/ou
    en ce que la canalisation à tube ondulé (23) est conçue, dans la direction longitudinale (30) du tuyau en étant dépourvue de toute ondulation, tout au moins par sections, sur une zone partielle (32) dans la direction circonférentielle (37) ; et/ou
    en ce que la canalisation à tube ondulé (23) présente un contour ondulé (36), lequel s'étend, tout au moins par sections, en forme de spirale autour d'un axe, dans la direction longitudinale (30) du tuyau.
  2. Lave-vaisselle selon la revendication 1,
    caractérisé en ce que
    la zone partielle (32) qui est dépourvue de toute ondulation dans la direction circonférentielle (37) et le canal d'amenée d'air (31) sont conçus en vis à vis l'un par rapport à l'autre.
  3. Lave-vaisselle selon l'une des revendications précédentes,
    caractérisé en ce que
    la canalisation à tube ondulé (23) est disposée à l'intérieur de la cuve à eau propre (17) en formant des méandres, tout au moins par sections ;
    dans lequel chacun des méandres (33) présente respectivement des branches en méandre (34, 35) qui sont, de préférence, inclinées à l'horizontale.
  4. Lave-vaisselle selon la revendication 3,
    caractérisé en ce qu'
    une, en particulier chacune, des branches en méandre (34, 35) présente un canal d'amenée d'air (31) au niveau de la paroi supérieure de son tuyau, dans la position de montage.
  5. Lave-vaisselle selon la revendication 3 ou 4,
    caractérisé en ce qu'
    une, en particulier chacune, des branches en méandre (34, 35) présente, au niveau de la paroi inférieure de son tuyau, une zone partielle (32) qui est dépourvue de toute ondulation dans la direction circonférentielle (37).
EP16188694.0A 2015-09-25 2016-09-14 Lave-vaisselle, notamment lave-vaisselle ménager Active EP3146883B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102015116254 2015-09-25
DE102015116238 2015-09-25
DE102015116248.2A DE102015116248B3 (de) 2015-09-25 2015-09-25 Geschirrspülmaschine, insbesondere Haushaltsgeschirrspülmaschine

Publications (2)

Publication Number Publication Date
EP3146883A1 EP3146883A1 (fr) 2017-03-29
EP3146883B1 true EP3146883B1 (fr) 2017-10-18

Family

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Application Number Title Priority Date Filing Date
EP16188694.0A Active EP3146883B1 (fr) 2015-09-25 2016-09-14 Lave-vaisselle, notamment lave-vaisselle ménager

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107019372A (zh) * 2017-05-27 2017-08-08 牟省先 热力泵智能保健床具
US20220296074A1 (en) * 2019-06-14 2022-09-22 Electrolux Appliances Aktiebolag Washing appliance

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530326B1 (fr) * 1982-07-16 1987-07-24 Bonnet Ets Bloc recuperateur de calories et lave-vaisselle muni d'un tel bloc
DE3901169A1 (de) 1989-01-17 1990-07-19 Licentia Gmbh Verfahren und vorrichtung zur rueckgewinnung von waermeenergie
DE102009045547A1 (de) 2009-10-09 2011-04-14 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Rückgewinnung von Energie aus der Wärme von Abwasser eines wasserführenden Haushaltsgerätes
DE102011078730A1 (de) 2011-07-06 2013-01-10 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
DE102013213969B4 (de) * 2013-07-17 2015-07-09 BSH Hausgeräte GmbH Geschirrspülmaschine mit einem in einem Wasserbehälter integrierten Abflussrohrleitungsabschnitt sowie zugehöriges Verfahren zum Betreiben der Geschirrspülmaschine

Non-Patent Citations (1)

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

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