EP3047150B1 - Appareil ménager à circulation d'eau comprenant une pompe à rotor noyé - Google Patents

Appareil ménager à circulation d'eau comprenant une pompe à rotor noyé Download PDF

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Publication number
EP3047150B1
EP3047150B1 EP13770413.6A EP13770413A EP3047150B1 EP 3047150 B1 EP3047150 B1 EP 3047150B1 EP 13770413 A EP13770413 A EP 13770413A EP 3047150 B1 EP3047150 B1 EP 3047150B1
Authority
EP
European Patent Office
Prior art keywords
rotor
bearing
water
shaft
domestic 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.)
Active
Application number
EP13770413.6A
Other languages
German (de)
English (en)
Other versions
EP3047150A1 (fr
Inventor
Igor Hoffmann
Stephan Lutz
Hans-Holger Pertermann
Sergej STUMPF-SCHEMETOW
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
Original Assignee
BSH Hausgeraete GmbH
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 BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL13770413T priority Critical patent/PL3047150T3/pl
Publication of EP3047150A1 publication Critical patent/EP3047150A1/fr
Application granted granted Critical
Publication of EP3047150B1 publication Critical patent/EP3047150B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0633—Details of the bearings
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • 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 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/085—Arrangements or adaptations of pumps
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • D06F2103/48—Current or voltage of the motor driving the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/44—Resins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603—Composites; e.g. fibre-reinforced

Definitions

  • the invention relates to a water-conducting household appliance, in particular domestic dishwasher, with a canned pump having a rotor chamber exhibiting a, at least in operating phases liquid-carrying housing, a rotatably mounted in the rotor chamber rotor unit, in a conveying area a conveying wheel for conveying the liquid, and at least one having a portion within the housing extending shaft, via which the rotor unit and / or the feed wheel coupled together, in particular with the rotor unit and / or the feed wheel are rotatably connected, wherein the shaft within the rotor chamber on the conveyor wheel side facing the rotor unit is mounted with a first bearing and on the side facing away from the feed wheel of the rotor unit with a second bearing.
  • Pumps for water-bearing household appliances are usually designed as canned pumps with wet-running systems.
  • a pump has a rotor chamber exhibiting, in particular surrounding housing, which is liquid-permeable. This permeability is usually realized by bypass openings, through which a liquid such as water can get into the interior of the rotor chamber.
  • a rotor unit In the rotor chamber is a rotor unit, which is part of a drive for the canned pump.
  • the canned pump comprises a delivery wheel for conveying the liquid and a shaft extending at least with a partial region within the housing, with which the rotor unit or the rotor and delivery wheel are non-rotatably connected.
  • the shaft is mounted inside the rotor chamber with a first bearing on the side of the rotor facing the delivery wheel and a second bearing on the side of the rotor facing away from the delivery wheel.
  • the canned pump of the water-conducting household appliance has at least one leading through the rotor, fluid-through connection channel or passage on an area on the side facing away from the impeller of the rotor with an area on the The conveyor wheel facing side of the rotor connects.
  • the respective connecting channel in the rotor shell of the rotor unit is provided such that the respective connecting channel outside the outer circumference of the shaft in the region between the radially inner edge and the radially outer edge of the seated on the shaft shell of the rotor unit is provided and connects a second bearing receiving portion of the rotor chamber with a first bearing receiving portion of the rotor chamber.
  • air which may be located in the region with the second bearing on the side of the rotor facing away from the conveying wheel may advantageously be on the side of the rotor facing the conveying wheel with the first bearing stream.
  • This air can then pass out of the housing through one or more openings such as, for example, a bearing gap between the shaft and the first bearing axially facing the delivery wheel, and in particular exit from the housing via the delivery region of the canned pump and its discharge nozzle.
  • the housing of the canned pump comprises a split pot, the interior of which encloses the rotor chamber.
  • the can has a closed, preferably integrally formed, bottom or end wall in the region of the second bearing, i. on its side facing away from the feed wheel, so that it is sealed there fluid-tight and an air exchange between the second bearing having inner region of the rotor chamber and the environment via this end of the conveyor wheel facing away from the end wall of the can hardly or not at all takes place.
  • the venting of this rear, the second bearing receiving portion of the split pot is carried out according to the invention via the one or more connecting channels in the seated on the shaft shell of the rotor forward to the region lying in front of the rotor with the first bearing.
  • the inventive design of the canned pump ensures that noise during operation can be reduced. Furthermore, the near-axis vent increases the lubrication of the bearings of the shaft by fluid and, as a result, the reliability and service life of the bearings. In addition, undefined conditions in the bearing gap are avoided.
  • the one connecting channel (or the plurality of connecting channels) in the interior of the shaft-mounted shell of the rotor which reconnects (or reconnects) the area of the rotor chamber receiving the second bearing to the area of the rotor chamber receiving the first bearing , can any localized pressure differences in the fluid, ie gas and / or liquid present in the rotor chamber, are better compensated in the rotor chamber. In this way, noise and / or wear problems in the canned pump constructed according to the invention are largely avoided. Advantageously, their reliability and service life is improved.
  • the one connecting channel (or the plurality of connecting channels) in the interior of the shaft-mounted shell of the rotor which reconnects (or reconnects) the area of the rotor chamber receiving the second bearing to the area of the rotor chamber receiving the first bearing
  • the one connecting channel may be any local pressure differences in the fluid, ie Gas and / or liquid, which is present in the rotor chamber, can be better compensated in the rotor chamber.
  • noise and / or wear problems in the canned pump constructed according to the invention are largely avoided.
  • their reliability and service life is improved.
  • a circulation path is provided with a return path between the front portion of the rotor chamber facing the impeller and the rear portion of the rotor chamber facing away from the impeller.
  • This circulation path comprises a rotor gap between the radially outer edge of the rotor unit and the inner wall of the outer boundary formed by the housing of the rotor chamber and the at least one fluid-through connection channel in the shell of the rotor unit itself.
  • any local pressure differences of the fluid in the front and / or rear region of the rotor chamber in the radial direction can be partially reduced and thus reduced, or completely degraded.
  • the construction according to the invention of the canned pump with the at least one fluid-passing connection channel in the jacket of the rotor unit is advantageous in particular in the case of a rotor chamber which is prefilled with liquid or which is in liquid-conducting communication with the delivery region or conveying path of the canned pump and in the delivery operation of the canned pump in which whose impeller is rotated, is filled with a subset of the liquid to be conveyed. Because the fluid-through connection channel in the shell of the rotor unit ensures that the liquid in the areas in front of and behind the rotor and thus housed there first bearing of the shaft and the second bearing of the shaft, preferably substantially evenly distributed.
  • the one or more fluid-passing channels or passages in the jacket of the rotor unit advantageously allow air, which in particular in the regular production operation, but especially in the starting operation of the canned pump - possibly in the rear, ie the impeller located or collects remote space region of the rotor chamber, in the front, ie the conveyor wheel facing space region of the rotor chamber can be performed. It is thus provided by the one or more fluid-through connection channels in the jacket of the rotor unit a venting or degassing for the rear space of the rotor chamber.
  • openings such as in the front, the conveyor wheel facing part of the boundary, in particular the front bearing plate and / or the front seal, the rotor chamber to the outside.
  • an opening may be formed by a radial bearing gap between a portion of a shaft of the canned pump extending into the rotor chamber along its central axis and a front bearing for the shaft provided on the side of the rotor unit facing the impeller.
  • the air can be fed through this bearing gap to the conveying region of the canned pump and thus the conveying path in which the delivery wheel is inserted, and along which the liquid to be conveyed is transported during operation of the canned pump. In particular, it passes through the discharge nozzle of the canned pump out of this.
  • Such venting or degassing of the rear region of the rotor chamber ie the elimination of trapped air from the rear region of the rotor chamber via this at least one, the front and the rear region of the rotor chamber interconnecting, fluid-through connection channel in the shell of the rotor unit is particularly in a Canned pump with wet-runner system favorable.
  • This has a split tube, the interior of which forms the rotor chamber.
  • In the can along the central axis of a portion of the shaft of the pump.
  • a first bearing and in the rear, the conveyor wheel facing away from the region of the rotor chamber a second bearing is provided in the front, the conveyor wheel facing region of the rotor chamber.
  • the rotor and / or the delivery wheel are preferably coupled together via the shaft.
  • the delivery wheel and / or the rotor are mounted rotationally fixed on the shaft.
  • the bearing gap between the shaft and the first bearing Through the bearing gap between the shaft and the first bearing, the gap (rotor gap) between the radially outer edge of the shell of the rotor unit and the inner wall of the outer boundary of the rotor chamber, and the bearing gap between the shaft and the second bearing flows during the conveying operation, in particular start-up, the canned pump a subset of the liquid to be delivered in the various areas of the rotor chamber.
  • both the front region of the can with the first bearing and the rotor gap and the rear region of the can with the second bearing are filled with the liquid to be delivered during the pumping operation of the pump.
  • Air is in the different areas of the rotor chamber eg after the pump has come to a standstill when it starts up, ie the speed is up.
  • the air bubble which forms in a, preferably annular or toroidal, zone around the shaft in the front region of the rotor chamber, can escape from the front region of the rotor chamber via the bearing gap between the shaft and the first bearing in the conveying region of the delivery wheel.
  • the air bubble which forms around a radially inner region of the rotor chamber around the shaft in the rear, the second bearing of the shaft receiving portion of the rotor chamber, can now by the inventive one or more fluid-through connection channels in the jacket of the rotor unit to the front, the first camp flow the shaft receiving portion of the rotor chamber and escape from there via the bearing gap between the shaft and the first bearing in the conveying region of the feed wheel.
  • the canned pump is reduced or largely avoided. It increases the reliability and life of the bearing by thus improved lubrication of the bearings by liquid.
  • the bearings can also be cleaned and cooled in an improved manner by the improved circulation of fluid between the delivery region of the delivery wheel of the canned pump and the front and rear regions of the rotor chamber. In particular, dry running of the bearing with associated vibrations and increased wear is largely avoided in the rear region of the rotor chamber. In addition, undefined states in the respective bearing gap are avoided.
  • one or more fluid-through connection channels also in other types of canned pump construction, in which the rear portion of the rotor chamber is at least partially pre-filled with a lubricating fluid, an air bubble, which is trapped in the rear of the rotor chamber, from this after be removed the functional principle of the invention.
  • the construction of the invention is particularly useful in canned pumps, in which by one or more components or components such as Rotor and / or the shaft of the pump, the liquid in the rotor chamber is imparted a rotational movement, so that any existing air is concentrated in the central region of the rotor chamber.
  • the respective connecting channel expediently extends along the longitudinal extension, in particular the central axis of the rotor chamber and thus along the centrally mounted shaft.
  • the respective channel is arranged substantially parallel to the shaft of the pump. In particular, it exhibits a substantially rectilinear course section.
  • the air can be discharged in the fastest possible way from the region located on the side facing away from the feed wheel to the region of the rotor chamber facing the feed wheel.
  • the respective channel in the rotor shell in a region as close to the shaft. This ensures that air which possibly collects in the area of the rotor chamber facing away from the conveying wheel near the shaft in the conveying operation of the canned pump is properly discharged to the opposite side of the rotor chamber facing the conveying wheel.
  • This region of the rotor shell, in which the respective connecting channel extends is preferably situated between the radially inner edge of the rotor shell seated on the shaft and the outer jacket mounted on the rotor shell, viewed in the radial direction.
  • the rotor has radially on the inside a support body, which is preferably firmly seated with its radially inner edge on the shaft, and mounted on the radially outer magnets are preferably held.
  • the at least one channel advantageously extends in this support body.
  • the magnets, which are arranged around the outer circumference of the support body can thus remain free of air passages, which could possibly interfere with or disturb the desired magnetic properties of the rotor unit.
  • the support body is made of plastic, one or more inventively designed connecting channels in the support body during its production such as during Plastic syringes are introduced. This is production technology particularly favorable, because a subsequent, time-consuming drilling of the rotor unit is eliminated.
  • the rotor unit can be fastened by means of the supporting body on the shaft in a simple manner rotatably.
  • the respective connecting channel extends in the rotor shell in the vicinity of the shaft. In this way, a particularly reliable ventilation of the rotor chamber in the region of the second, the conveyor wheel remote bearing is ensured.
  • the respective channel has a radial distance from the outer surface of the shaft of at most 5 mm, in particular between 0.5 mm and 3 mm.
  • the passage area of the fluid-carrying connection channel is selected between 0.5 and 50 mm 2 .
  • the length of the fluid-passing connection channel is chosen to be substantially equal to the axial length of the rotor shell.
  • the respective connecting channel preferably has a length between 1 mm and 50 mm, in particular between 1 mm and 20 mm, to (viewed from the feed wheel in Direction of the second bearing or the conveyor wheel facing away from the end of the can) to traverse the rotor shell from the rear end to the front end.
  • the respective connecting channel on the side facing the conveying wheel has a partial section which leads to the shaft with a radial direction component and there in particular into a axially extending bearing gap between the first bearing and the outer surface of the shaft opens.
  • the air can be guided to the first bearing and escape in a simple manner from the housing of the rotor chamber.
  • connection channels When a plurality of connection channels are arranged symmetrically in the circumferential direction of the rotor, i. In the circumferential direction with approximately the same circumferential angle offset from one another, imbalances of the rotor are largely avoided. In addition, a particularly rapid and uniform discharge of air from the area located on the side remote from the feed wheel results.
  • the rotor and / or the delivery wheel are rotatably connected to the shaft.
  • the shaft In the conveying operation of the pump in a structurally simple manner a perfect power transmission of the rotational movement of the rotor to the feed wheel on the shaft allows.
  • the rotor chamber and / or the rotor or rotor is designed substantially rotationally symmetrical.
  • the shaft of the pump is then expediently arranged along the central axis of the rotor chamber.
  • the inventive water-conducting household appliance has a pump unit, in which an electric motor is provided with a held in a liquid at least in operating phase space rotor unit, with a fixed in a dry outer space stator and a arranged between the rotor unit and stator gap unit.
  • At least one pump unit is provided for circulating and / or pumping off the water, which may be mixed with cleaning agent and / or dirt an electric motor with a rotor unit held in liquid and a stationary in a dry outer space arranged stator and a arranged in the magnetic gap between the rotor unit and stator tube section of non-magnetic material such as stainless steel or plastic.
  • the rotor unit can by their arrangement in the liquid, in particular the liquid to be conveyed, be lubricated by this, so that if necessary, a movable shaft seal can be omitted.
  • Such an arrangement with a pipe section in the magnetic gap is referred to as a canned arrangement.
  • it can be designed as a containment shell in which the end of the tube section facing away from the feed wheel is closed, ie provided with a closure element which is in particular integrally formed.
  • the can is filled with a liquid such as with a fluid or other liquid and seals it from the outside.
  • the split tube provides separation between its liquid-filled interior housing the shaft of the pump and the rotor unit fixedly mounted on it and the dry outer space accommodating the stator unit.
  • it is particularly important to keep the thickness of the magnetic gap (as viewed in the radial direction) as small as possible.
  • the magnetic gap in a proportion of wall material of the pipe section and liquid in the rotor gap, ie the space between the radially outer edge of the rotor shell and the inner wall of the pipe section (viewed in the radial direction)) composed and there the thickness of the liquid-filled portion of the magnetic gap for tolerance and contamination reasons can not be made arbitrarily small, a reduction of the wall thickness of the pipe section is crucial for the minimization of the radial gap thickness.
  • the split tube, together with the end shields and optionally further construction elements is expediently produced from a single part as a plastic pot by injection molding.
  • the plastics used should be particularly inexpensive, resistant to hydrolysis and chemicals and stable in temperature with high rigidity.
  • the previously required high filling levels with glass fibers limit the processing ability, especially with thin wall thicknesses.
  • the pipe section has a wall thickness of less than 0.75 millimeters.
  • ferrite arrangements for the rotor unit can advantageously also form a sufficiently high efficiency. It is possible to dispense with such arrangements based on rare earths.
  • the named pipe section is formed from a plastic with a melt flow index of more than 30 cm 3 per 10 minutes at 230 ° C.
  • the production of the pump unit is particularly simple if the pipe section is expediently part of a one-piece housing part of the pump housing, in particular forms an integral part of the pump housing.
  • this one-piece housing part can form a rotor housing, in whose rotor chamber the drive shaft is accommodated with the rotor unit of the motor of the pump unit attached to it.
  • a rear housing bottom and / or a front end section bounding the hydraulic chamber of the pump unit may be integrally formed on the pipe section. Then advantageously one or more additional sealing points between the pipe section and one or more attachment components such as a separate, rear housing bottom or a hydraulic chamber limiting, separate, front end component can be avoided.
  • the pipe section may also be embedded in a multi-part pump housing as a separate component, in order to have to use flowable and therefore usually more expensive plastic material only in the actual canned area in order to produce it, but otherwise to cheaper materials to be able to fall back.
  • the said pipe section in both cases is a so-called. Canned in the magnetic gap between the rotor and stator.
  • the pipe section can in particular form an injection-molded part or a component of an injection-molded part, and nevertheless the o. G. have thin wall thickness.
  • the plastic of the pipe section is in particular highly reinforced and has a glass fiber or carbon content of at least 30%, in particular of at least 40%.
  • the inventive provision of one or more connecting channels in the jacket of the rotor unit for fluid-continuous connection of the rear, a second bearing of the shaft having portion of the rotor chamber with a front, a first bearing of the shaft having portion of the rotor chamber allows advantageously, the radial thickness of Rotor gap between the radially outer boundary of the shell of the rotor unit and the inner wall of the split tube section to make smaller than in a conventional canned pump having no fluid-communicating connection channel between the rear and the front portion of the rotor chamber.
  • the one or more additional fluid-communicating connection channels in the jacket of the rotor unit that liquid and / or air can flow from the area behind the rotor unit of the rotor chamber to the front of the rotor unit area of the rotor chamber improved.
  • the flow through the rotor chamber is thus improved. It can in particular improve air, which is located in the rear area of the rotor chamber, in particular in the rotational mode of the
  • the canned pump collects near the shaft, reach forwards into the front area of the rotor chamber and from there out of the canned pump.
  • a venting of the rear portion of the rotor chamber would be less possible over the radially outer rotor gap, the smaller the radial thickness of the rotor gap, ie the gap or the clearance between the radially outer edge of the shell of the rotor unit and the inner wall of the split tube section. Also, the smaller the radial thickness of the rotor gap, the worse the liquid exchange between the rear region and the front region of the rotor chamber.
  • the design principle of the canned pump according to the invention enables radial expansion, i.
  • radial thickness of the rotor gap between the radially outer edge of the shell of the rotor unit and the inner wall of the split tube section so small that particles or dirt particles in the liquid to be conveyed e.g. are contained in the respective rinse cycle of a dishwasher, are largely prevented from passing through the rotor gap in the axial direction seen from the front of the rotor chamber to the rear of the rotor chamber.
  • Undesirable contamination of the rear bearing of the shaft and a concomitant wear and / or other adverse effects on the rear bearing of the canned pump are thus largely avoided.
  • the radial extent of the rotor gap is preferably selected smaller than the maximum cross-sectional width of the particles or dirt particles usually occurring in the liquid to be delivered.
  • the design principle of the canned pump according to the invention advantageously allows in particular a rotor gap, ie a gap or a gap between the radially outer edge of the shell of the rotor unit and the inner wall of the rotor chamber forming the split tube section, the radial thickness preferably can be less than 0.5 mm.
  • a dishwasher is designed according to the invention.
  • the dishwasher 1 shown schematically in side view is a domestic dishwasher and has a washing container 420 for receiving items to be cleaned dishes such as dishes, pots, cutlery, glasses, cooking utensils u. on.
  • the rinsing container 420 may have an at least substantially rectangular floor plan with a front side V facing a user in the operating position.
  • the washing container 420 can be closed by a door 43 on its front side.
  • This door 43 is in FIG. 4 shown in the closed position and, for example, about a lower horizontal axis 43a in the direction of arrow 43d forward (on a standing in front of the dishwasher user) to swing open. Another, different from the pivoting opening movement is possible.
  • the items to be washed can be held in at least one washing basket;
  • exactly two baskets namely a lower dish basket 441 and an upper dish basket 442, are provided one above the other in the washing container 420.
  • the number of rinse baskets can vary depending on the extent and type of the dishwasher 1. Also a so-called.
  • Cutlery drawer can be additionally provided.
  • These crockery baskets 441, 442 are spray devices 46, 47 such as over long in the radial direction, each rotatable about a center spray arms and / or individual nozzles with fresh water FW and / or with circulating water, depending on the rinsing step of each expiring Dishwashing program with detergent, rinse aid and / or other excipients may be added, so-called. Rinsing liquor S, acted upon.
  • the plane of rotation of such a rotatable spray arm is preferably substantially in a horizontal or horizontal plane.
  • the rinse baskets 441, 442, for example on rollers 410 can be displaced forward, so as to achieve an access position for the user, in which he can comfortably load and unload the rinse baskets 441, 442.
  • at the respective in the direction of the front side V facing edge planes of the dishwashing or baskets 441, 442 pull and push handles to simplify the insertion and removal of the dish or Spülkörbe 441, 442 may be provided.
  • Flush liquor liquid, ie fresh water FW, and / or circulating and possibly added with detergent and / or rinse aid and / or other auxiliaries water S which may contain contaminants especially washed dishes, runs after their distribution in the washing container 420 and on the dishes down through a in the bottom portion 48 of the washing container 420 arranged collecting pot with sieve unit 411 to one of these downstream circulating pump unit (circulating pump) 48.
  • the Spülflotten thoroughlykeit S is exemplified by at least one in FIG. 4 only schematically illustrated heater 413 to a manifold 414, in particular to a water switch, and from there to the said spray 46, 47 passed, in particular pumped.
  • the washing liquor circulating pump unit 48, the heater 413, the manifold 414 and the spray 46, 47 is in each case at least one liquid connection, in particular in the form of a pipe or hose provided.
  • an pumping pump unit or a sewage pump 49 is provided, which is inserted into a drainage pipe. About this drainage pipe wastewater AW is passed out of the machine 1.
  • the pump units 48, 49 can also be combined with one another, so that then only a single pump unit is present in total.
  • circulation pump 48 is combined with the heating device 413, so that a compact heating pump is formed.
  • a summary with the distributor 414 may also be appropriate.
  • At least one of the pump units 48, 49, in particular the circulation pump, is designed as a canned pump.
  • An embodiment of such a canned pump is in the FIG. 1 shown in a schematic cross-sectional view and marked with the reference numeral 2. It works preferably according to the principle of a centrifugal pump. It has an impeller or impeller 14, which can be designed differently depending on the version. This is mounted at the front end of a central drive shaft 16 and protrudes from a housing 4. The feed wheel 14 is driven by the drive shaft 16, which is mounted wet in its end, ie at its end opposite the feed wheel 14.
  • the drive shaft 16 is rotatable by an electric motor 17, that is drivable, wherein the electric motor 17 comprises a arranged on the drive shaft 16 and held in liquid with this rotor unit 8, to which radially outward also a gap in the liquid space 32 adjoins.
  • the term "held in liquid” means that the corresponding receiving space for the rotor unit 8 can be flooded by liquid at least during operation of the pump unit.
  • the bearing lubrication and cooling liquid acquiring is alternatively possible, for example if the rotor chamber is encapsulated by the delivery area of the canned pump.
  • a stator 12 of the electric motor 17 is fixed, the here in particular comprises a plurality of stator laminations, which are each enclosed by stator magnet coils 525.
  • the pipe section 4 ' is preferably located substantially parallel to the gap region 32 and between the rotor unit 8 and the stator unit 12 in the magnetic gap. It is preferably substantially cylindrical, preferably formed approximately circular cylindrical.
  • the shaft 16 is preferably substantially centrally in the pipe section 4 '.
  • the thickness of the magnetic gap between the radially outer boundary 42 of the cylinder jacket 50 of the rotor unit 8 and the radially inner boundary of the outer, in the dry outer region 6 'arranged stator 12 is defined by the sum of the thickness of the liquid gap 32 and the thickness of the pipe section 4 '(viewed in the radial direction from inside to outside with respect to the central axis of the shaft 16).
  • the thickness of the magnetic gap (viewed in the radial direction with respect to the central axis of the shaft) is chosen to be as small as possible for high magnetic efficiency.
  • the pipe section 4 'of the canned pump 2 is expediently made of a readily flowable plastic, in particular with a melt flow index of more than 10 cm 3 per 10 minutes, preferably of more than 30 cm 3 per 10 minutes at 230 ° C. , In this case, the pipe section 4 'advantageously has a hitherto unknown thin wall thickness of less than 0.75 millimeters.
  • a plurality of magnets 10 are preferably mounted externally on a radially inwardly fixed on the shaft support body 39 between the front and rear side cheek 501, 502.
  • the magnets 10 are located at their radially outer peripheral portion which extends approximately parallel to the longitudinal extent of the shaft 16 between the two side walls 501, 502 of the support body freely accessible. Expressed in general terms, a magnetic body 10 is thus attached around the supporting body 39 on the outside, and thus the rotor shell 50 is formed.
  • the canned pump 2 comprises a housing 4, which is essentially formed by a split tube.
  • the housing 4 defines a rotor chamber 6, in which a rotor or a rotor unit 8 is located.
  • the rotor 8 is part of a drive for the canned pump 2. It has a radially inner support body 39, around its outer periphery radially outside magnets 10 are mounted.
  • the support body 39 is rotationally fixed on the shaft 16 of the canned pump 2. He is in particular made of plastic.
  • the magnets 10 cooperate with a stator 12 located outside the housing 4.
  • the canned pump has a delivery wheel 14, which serves to convey the liquid, such as, for example, water.
  • the shaft 16 of the canned pump 2 extends with a second, the conveyor wheel facing away portion 18 within the housing 4 and projects with a further, ie first, the conveyor wheel 14 facing portion 20th out of the housing 4 out.
  • rotor 8 and the feed wheel 14 are rotatably connected.
  • the rotor 8 is in this case with the second section 18 of the shaft 16 extending within the housing 4 firmly connected while the feed wheel 14 is fixedly connected to the first section 20 of the shaft.
  • the shaft 16 is (in the axial direction in the direction of the conveying wheel in the interior of the housing 4) within the housing 4 with a first, i. front bearings 22 and a second, i. rear bearing 24 rotatably mounted.
  • the first bearing 22 is located on the conveyor wheel 14 side facing 23 of the rotor 8, the second bearing 24 on the side facing away from the conveyor wheel 14 25 of the rotor.
  • Both bearings 22, 24 are designed as so-called wet bearings. Such a wet storage is lubricated by the means of the feed wheel to be conveyed liquid, so in this example water.
  • the rotor 8 further divides the rotor chamber 6 of the canned pump 2 into a region 26 located on the side 23 facing the delivery wheel 14 and a region 28 which faces away from the delivery wheel 14.
  • a containment shell is provided. In particular, this is formed in one piece.
  • the housing 4 is fluid-permeable, ie there is a liquid-conducting connection between the conveying region 40 of the conveying wheel 14 and thus the conveying path of the pumping unit, along which the liquid to be conveyed is transported, and the rotor chamber 6.
  • 4 are not shown in detail in this case
  • Bypass openings that allow penetration of the liquid first into the front portion 26 of the housing so that it is in contact with the liquid to be conveyed during operation of the canned pump 2.
  • there are slots in some parts of the bearing which allow circulation of the fluid. For example, by means of a bearing gap 30 located between the shaft 16 and the first bearing 22, liquid can penetrate into the housing 4 or be led out of the housing 4 of the canned pump 2 during operation.
  • the liquid to be conveyed also reaches the rear area 28 of the rotor chamber 6 with the second bearing 24 ,
  • the rotor 8 the shaft 16 and the feed wheel 14 thus set in rotation, is formed by the resulting pressure conditions, which also act in the radial direction of the rotor 8, a water flow through the rotor chamber 6.
  • This serves for the lubrication of the two bearings 22, 24, but also for cooling and cleaning the canned pump 2.
  • air can penetrate into the rotor chamber 6. Due to the centrifugal forces occurring during operation of the canned pump 2, this air is forced in the rotor chamber 6 in the direction of the shaft 16, i. a central area of the rotor chamber.
  • the rotor 8 of the canned pump 2 in its rotor shell 50 between the radially inner edge 41 and its radially outer edge 42 at least one fluid-communicating connection channel or passage 34 on such in that it connects the rear area 28 receiving the second bearing 24 on the side 25 of the rotor unit 8 facing away from the conveying wheel 14 with the front area 26 receiving the first bearing 22 on the side 23 of the rotor unit 8 facing the conveying wheel.
  • two channels 34 are preferably present, which are spaced apart from each other by approximately 180 ° in the circumferential direction and are thus arranged symmetrically in the circumferential direction of the rotor 8.
  • the liquid As caused by the centrifugal forces caused by the rotating impeller 14, the liquid is rotated about the shaft and displaced radially outwardly to the housing 4, the liquid presses the air present in the rear portion 28 of the rotor chamber radially inwardly to the shaft 16.
  • the respective connecting channel 34 it is expedient to arrange the respective connecting channel 34 as close as possible to the shaft 16, around which there in a central zone of the rotor chamber in the rear region 28 collecting air largely completely forward in the front portion 26 of the rotor chamber 6 and from there preferably in the delivery area 40, via the adjoining hydraulic chamber 27 and the adjoining discharge port 270 of the canned pump 2 to be able to lead out of this.
  • the channels 34 in the jacket 50 of the rotor unit 8 are arranged in a region 38 between magnets 10 located on the rotor 8 and the radially inner edge 41 of the shell 50 seated on the shaft 16.
  • This region 38 is formed here by the support body 39 in the exemplary embodiment.
  • the respective connection channel 34 can already be used during its manufacture, such as e.g. When plastic injection molded into the plastic material into it. Then no subsequent drilling of the respective connection channel is required.
  • the connecting channel 34 is arranged for the rapid removal of air substantially longitudinally extending to the shaft 16, in particular parallel to the shaft 16. This course of the connecting channel 34 ensures that the air can be removed by the shortest route.
  • FIG. 2 and 3 A more detailed view of the rotor 8 and the shaft 16 and the channel 34 show the Fig. 2 and 3 , Here it can be seen that the one or more connecting channels 34 additionally have on the side facing the conveying wheel 14 in each case a section 36 which leads in the radial direction to the shaft 16. This section 36 is formed by a radial groove. With the help of each channel 34, the air from the rear portion 28 of the rotor chamber 6 is then fed forward to the first bearing 22, so that through the bearing gap 30, the air can escape from the rotor chamber 6.
  • the channels 34 preferably each have a square cross-section. However, their respective cross-section may also have another shape, such as a round cross-sectional geometry shape.
  • the venting function of the connecting channels 34 is therefore largely independent of their respective cross-sectional geometry shape.
  • the channels 34 may also have different shapes, courses and cross sections in sections.
  • the inventive design principle of the canned pump to make the radial extent, ie radial thickness of the rotor gap between the radially outer edge of the shell of the rotor unit and the inner wall of the split tube so small that particles or dirt particles in the promotional Liquid are included, for example, the respective rinse cycle of a dishwasher, are prevented from being able to traverse the rotor gap in the axial direction from the front of the rotor chamber to the rear of the rotor chamber. Dirt on the rear bearing of the shaft and a concomitant wear and / or other adverse effects of the rear bearing of the canned pump are thus largely avoided.
  • the radial extent of the rotor gap is preferably selected smaller than the maximum cross-sectional width of the particles or dirt particles usually occurring in the liquid to be delivered.
  • the inventive provision of one or more connecting channels in the jacket of the rotor unit for fluid-continuous connection of the rear, a second bearing of the shaft having portion of the rotor chamber with a front, a first bearing of the shaft having portion of the rotor chamber allows advantageously, the radial thickness of Rotor gap between the radially outer boundary of the shell of the rotor unit and the inner wall of the split tube section to make smaller than in a conventional canned pump having no fluid-communicating connection channel between the rear and the front portion of the rotor chamber.
  • the one or more additional fluid-communicating connection channels in the jacket of the rotor unit that liquid and / or air can flow from the area behind the rotor unit of the rotor chamber to the front of the rotor unit area of the rotor chamber improved.
  • it can improve air that collects near the shaft in the rear region of the rotor chamber, in particular in the rotary operation of the canned pump, reach forward into the front region of the rotor chamber and from there out of the canned pump be conveyed out.
  • This ensures that the second bearing of the shaft in the rear of the rotor chamber in the rotary operation of the canned pump is in liquid, thereby remains fluid lubricated and is cooled by the liquid, and does not run dry.
  • the design principle of the canned pump according to the invention advantageously allows in particular a rotor gap, ie a gap or a gap between the radially outer edge of the shell of the rotor unit and the inner wall of the rotor chamber forming the split tube section, the radial thickness preferably smaller than 0.8 mm, preferably less than 0.5 mm, can be.
  • a rotor gap ie a gap or a gap between the radially outer edge of the shell of the rotor unit and the inner wall of the rotor chamber forming the split tube section
  • the radial thickness preferably smaller than 0.8 mm, preferably less than 0.5 mm
  • the axial length of the jacket of the rotor unit and thus of the rotor gap is expediently selected to be at least 2 to 50 times the length of the dirt particles.
  • the axial length of the shell of the rotor unit is preferably selected between 1 mm and 50 mm, in particular between 1 mm and 20 mm.
  • the canned pump comprises a delivery wheel for conveying the fluid and a shaft extending at least with a partial region within the housing. are preferably connected to the rotor and impeller rotatably.
  • the shaft is mounted inside the rotor chamber with a first bearing on the side of the rotor facing the delivery wheel and a second bearing on the side of the rotor facing away from the delivery wheel.
  • this water flow preferably serves to lubricate the bearings, but in particular also has a cooling and cleaning function.
  • one or more connecting channels in the shell of the rotor which connect the rear portion with the front portion of the rotor chamber, local pressure differences, in particular for a radial pressure differences of the fluid in the front and / or rear area, on the other hand also axial fluid pressure differences between be compensated for the front and rear of the rotor chamber.
  • Unwanted noise, vibrations of the storage (s) coupled to the rotor, guided through its central axis shaft and wear of these bearings, eg by dry running, are now largely avoided, as in the central region of the rotor chamber around the shaft collecting air through the or more connection channels of the rotor can be removed from the rotor chamber.
  • housing part 4 which receives the drive shaft 16 with the rotor unit 8, in particular over its course of varying thicknesses, may advantageously be formed overall as a one-piece injection-molded part. It comprises the tube section 4 'surrounding the rotor unit 8 radially and preferably circularly cylindrical, which forms a so-called gap tube in the magnetic gap between rotor 8 and stator unit 12.
  • a housing bottom 31 may be formed so that a closed-end containment shell is formed.
  • a so-called B or rear bearing receptacle or a so-called B or rear bearing for the drive shaft 16 may be integrally formed on the housing bottom 31 on the inside.
  • a passage for the drive shaft 16 having, axial end of the can 4 ', a front end portion 29 integrally formed.
  • This front end section 29 may in particular have a front-side receiving wall or a flange for receiving a so-called A or front bearing holder 300.
  • a one-piece housing part 4 is provided for the drive shaft 16 with the rotor unit 8, which consists of an axial, preferably cylindrical, preferably substantially circular, pipe section 4 ', which has a rotor chamber 6 for housing the rotor unit 8 in the radial direction over its axial longitudinal extent considered limited, a rear, integrally molded housing bottom 31, which closes the pipe section 4 'liquid-tight at its rear axial end, and a front end portion 29 together.
  • the impeller 14 is housed to wash liquor liquid through a central intake manifold 260 from the outside in the axial direction (relative to the elongated Drive shaft) in the hydraulic chamber 27 to suck in and oftenzu qualifyn with a radial direction component through a discharge nozzle 270 to the outside of the pump unit 2.
  • the split tube section 4 ' which is preferably made of a mecanicfliessigen plastic with a melt flow index of more than 10 cm 3 per 10 minutes, be installed in the pump housing as a separate component.
  • a canned pump illustrates that in the FIG. 6 shown in section embodiment.
  • the connecting channels 34 are indicated merely by a dot-dash line in the jacket of the rotor unit 8.
  • this is preferably coupled via an additional sealing point with a separate, front end part or end piece 320, which adjoins the hydraulic chamber 27.
  • the rear end of the pipe section 4 ' provided with a one-piece molded housing bottom 31 and thus be formed a containment shell.
  • the high price of the expensive and despite its high melt flow index 'highly reinforced plastic for the pipe section 4' would be less significant in this version of the pump unit in terms of their total cost.
  • FIG. 6 An advantageous version in which the B-bearing and the cylindrical, sleeve-like surrounding pipe section 4 'are made of a first, very easily flowable material and the opposite, the impeller 14 facing end wall of the housing 4 form separate units, is in FIG. 6 shown. It would also be possible alternatively that only the cylindrical sleeve 4 'is formed from the plastic with a high melt flow index.
  • the housing bottom 31 may also be made of a less flow-coated plastic than the pipe section 4'0 which houses the rotor unit 8. Possibly. it may also be formed as a separate attachment, which can be suitably coupled in a manner analogous to the separate front end portion 320 with the aid of an additional seal to the rear end of the pipe section 4 'liquid-tight by means of appropriate fasteners.
  • the gap tube section 4 'can thus itself form an injection-molded part or a component of an injection-molded part.
  • the plastic of this pipe section 4 ' is here preferably polypropylene-based and in particular at the same time highly reinforced - for example, by a high glass fiber content of significantly more than 30%, in particular more than 40%, or by a carbon fiber content.
  • a high glass fiber content of significantly more than 30%, in particular more than 40%, or by a carbon fiber content.
  • outer and / or inner coatings of the pipe section 4 'with reinforcing materials may possibly be advantageous.
  • the rotor chamber and adjacent the impeller region which is preferably a polypropylene having a melt flow index between 10 and 40 cm 3 per 10 minutes, preferably 30 cm 3 per 10 minutes, used.
  • a high-strength plastic for example PPS
  • the rotor unit is free of envelopes at its radially outer edge, ie has bare magnetisable material, in particular ferrite material there.
  • FIGS. 1 . 5 . 7 is the bare outside of the magnetizable body 10 of the rotor unit respectively designated 42.
  • An existing of magnetizable material body of the preferably cylindrical rotor unit is expediently mounted on the radially inner support body such as 39, which is preferably made of plastic.
  • This inner support body sits around the drive shaft such as 16 firmly on. It has at its end facing the impeller the front, radially outwardly projecting retaining flange such as 501 and at its end remote from the impeller the rear, radially outwardly projecting retaining flange such as 502 on. Between the two lateral retaining flanges of the magnetizable body is mounted on the cylindrical outer surface of the support body, in particular attached to this.
  • the radially inner edge of the stator unit is expediently as gapless as possible, ie directly contacting the outer wall of the pipe section or gap tube.
  • the magnetic gap the more effective the magnetic interaction, in particular magnetic attraction between the magnetic field generated by the stator and the magnetic field generated by the rotor unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (26)

  1. Appareil ménager à circulation d'eau, notamment lave-vaisselle (1) à usage domestique, comprenant une pompe à moteur à gaine (2) qui présente un carter (4) transportant du liquide au moins pendant des phases de fonctionnement et présentant une chambre de rotor (6), une unité de rotor (8) installée de manière rotative dans la chambre de rotor (6), une roue de transport (14), dans une zone de transport (40), destinée à transporter le liquide, et un arbre (16) s'étendant à l'intérieur du carter (4) au moins avec une section partielle (18), par l'intermédiaire duquel arbre l'unité de rotor (8) et/ou la roue de transport (14) sont couplées entre elles, notamment à l'aide duquel arbre l'unité de rotor (8) et/ou la roue de transport (14) sont reliées de manière solidaire en rotation, l'arbre (16) étant logé à l'intérieur de la chambre de rotor (6) avec un premier palier (22) sur le côté (23) de l'unité de rotor (8), tourné vers la roue de transport (14), et avec un deuxième palier (24) sur le côté (25) de l'unité de rotor (8), détourné de la roue de transport (14), caractérisé en ce qu'au moins un canal de liaison (34) laissant passer le fluide passe à travers l'enveloppe de rotor (50) de l'unité de rotor (8) entre le bord (41) radialement intérieur de celle-ci et le bord (42) radialement extérieur de celle-ci de manière à ce qu'il relie une zone (28) logeant le deuxième palier (24) sur le côté (25) de l'unité de rotor (8), détourné de la roue de transport (14), à une zone (26) logeant le premier palier (22) sur le côté (23) de l'unité de rotor (8), tourné vers la roue de transport.
  2. Appareil ménager à circulation d'eau selon la revendication 1, caractérisé en ce que la chambre de rotor (6) est reliée à la zone de transport (40) en acheminant le liquide.
  3. Appareil ménager à circulation d'eau selon l'une quelconque des revendications 1 ou 2, caractérisé en ce qu'une gaine de moteur (4), notamment un pot d'entrefer, est ménagé dont l'espace intérieur forme la chambre de rotor (6).
  4. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que sur une section longitudinale de la section partielle (18) de l'arbre (16), logée dans la chambre de rotor (6), l'unité de rotor (8) entoure l'arbre (16) sur tous les côtés.
  5. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le canal de liaison (34) laissant passer le fluide dans l'enveloppe de rotor (50) de l'unité de rotor (8) s'étend essentiellement le long de l'arbre (16), notamment parallèlement à l'arbre (16).
  6. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce qu'en vue en direction radiale, le canal de liaison (34) laissant passer le fluide dans l'enveloppe de rotor (50) de l'unité de rotor (8) est disposé dans une zone (38) située entre des aimants (10) se trouvant sur le rotor (8) et le bord (41) radialement intérieur de l'enveloppe (50) posée sur l'arbre (16).
  7. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le canal de liaison (34) laissant passer le fluide dans l'enveloppe de rotor (50) de l'unité de rotor (8) s'étend dans la partie proche de l'arbre (16), notamment en ce qu'il présente un écart radial par rapport à la surface extérieure de l'arbre (16) de maximum 5 mm, notamment compris entre 0,5 mm et 3 mm.
  8. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de rotor (8) présente de manière radiale interne un corps de support (39) qui repose de manière fixe sur l'arbre (16) avec son bord (41) radialement interne et sur lequel sont ménagés des aimants (10) de manière radiale externe, et en ce que le canal de liaison respectif (34) laissant passer le fluide s'étend dans la matière du corps de support (39) radialement intérieur.
  9. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le corps de support (39) est fabriqué en matière plastique.
  10. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le canal de liaison (34) laissant passer le fluide présente sur le côté (23) de l'unité de rotor (8), tourné vers la roue de transport (8), une section partielle (36) qui mène à l'arbre (16) avec un composant directionnel radial et là aboutit notamment dans une fente de palier (30) s'étendant axialement entre le premier palier (22) et la surface extérieure de l'arbre (16).
  11. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que plusieurs canaux de liaison (34) sont disposés dans l'unité de rotor (8) en étant décalés de respectivement approximativement le même angle circonférentiel.
  12. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la section transversale de passage du canal de liaison (34) respectif laissant passer le fluide est sélectionnée entre 0,5 mm2 et 50 mm2.
  13. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la longueur du canal de liaison (34) respectif laissant passer le fluide est sélectionnée essentiellement identique à la longueur axiale de l'enveloppe de rotor (50).
  14. Appareil ménager à circulation d'eau selon la revendication 13, caractérisé en ce que la longueur du canal de liaison (34) respectif laissant passer le fluide est sélectionnée entre 1 mm et 50 mm, notamment entre 1 mm et 20 mm.
  15. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la pompe à moteur à gaine (2) comprend un moteur électrique (17) muni d'une unité de rotor (8) maintenue dans une chambre (6) acheminant du liquide pendant au moins des phases de fonctionnement et d'une unité de stator (24) disposée de manière fixe dans un espace extérieur (6') sec, ainsi que d'une section à gaine de moteur (4') disposée entre l'unité de rotor (8) et l'unité de stator (24).
  16. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la section à gaine de moteur (4') de la pompe à moteur à gaine est formée à partir d'une matière plastique légèrement fluide ayant un indice de fluidité de plus de 10cm3 par 10 minutes.
  17. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la section à gaine de moteur (4') de la pompe à moteur à gaine présente une épaisseur de paroi de moins de 0,75, notamment de moins de 0,5 mm.
  18. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la section à gaine de moteur (4') de la pompe à moteur à gaine est formée à partir d'une matière plastique ayant un indice de fluidité de plus de 30 cm3 par 10 minutes à 230°C.
  19. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la section à gaine de moteur (4') forme une partie intégrante d'une partie de carter (4) d'une seule pièce.
  20. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications 1 à 18, caractérisé en ce que la section à gaine de moteur (4') de la pompe à moteur à gaine est logée de manière étanche dans un carter de pompe (21) en plusieurs parties.
  21. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la section à gaine de moteur (4') de la pompe à moteur à gaine est une dite gaine de moteur dans la fente magnétique entre l'unité de rotor (8) et l'unité de stator (24).
  22. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la section à gaine de moteur (4') de la pompe à moteur à gaine forme une pièce en matière plastique moulée par injection, resp. une partie intégrante d'une pièce en matière plastique moulée par injection.
  23. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la matière plastique de la section à gaine de moteur (4') de la pompe à gaine de moteur est à base de polypropylène.
  24. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la matière plastique de la section à gaine de moteur (4') de la pompe à gaine de moteur est hautement renforcée.
  25. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la matière plastique de la section à gaine de moteur (4') de la pompe à gaine de moteur présente une proportion de fibres de verre d'au moins 30%, notamment d'au moins 40%.
  26. Appareil ménager à circulation d'eau selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la fente (32) entre le bord (42) radialement extérieur de l'enveloppe de rotor (50) de l'unité de rotor (8) et la paroi intérieure de la section de gaine à moteur (4') de la pompe à gaine à moteur, formant la chambre de rotor (6), est inférieure à 0,8 mm, notamment inférieure à 0,5 mm.
EP13770413.6A 2012-12-21 2013-09-17 Appareil ménager à circulation d'eau comprenant une pompe à rotor noyé Active EP3047150B1 (fr)

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PL13770413T PL3047150T3 (pl) 2012-12-21 2013-09-17 Urządzenie gospodarstwa domowego prowadzące wodę z zespołem silnik-pompa we wspólnej obudowie

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DE102012224263 2012-12-21
DE102012224262 2012-12-21
PCT/EP2013/069200 WO2014095102A1 (fr) 2012-12-21 2013-09-17 Appareil ménager à circulation d'eau comprenant une pompe à rotor noyé

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EP3047150A1 EP3047150A1 (fr) 2016-07-27
EP3047150B1 true EP3047150B1 (fr) 2017-06-07

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DE102010003432A1 (de) * 2010-03-30 2011-10-06 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgeschirrspülmaschine mit mindestens einer Pumpe, zugehörige Pumpe sowie Verfahren zu deren Herstellung

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DE102022202277A1 (de) 2022-03-07 2023-09-07 BSH Hausgeräte GmbH Pumpe, Pumpensystem und wasserführendes Haushaltsgerät

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WO2014095102A1 (fr) 2014-06-26
PL3047150T3 (pl) 2017-11-30
EP3047150A1 (fr) 2016-07-27

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