WO2014095102A1 - 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
WO2014095102A1
WO2014095102A1 PCT/EP2013/069200 EP2013069200W WO2014095102A1 WO 2014095102 A1 WO2014095102 A1 WO 2014095102A1 EP 2013069200 W EP2013069200 W EP 2013069200W WO 2014095102 A1 WO2014095102 A1 WO 2014095102A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
water
shaft
appliance according
bearing
Prior art date
Application number
PCT/EP2013/069200
Other languages
German (de)
English (en)
Inventor
Igor Hoffmann
Stephan Lutz
Hans-Holger Pertermann
Sergej STUMPF-SCHEMETOW
Original Assignee
BSH Bosch und Siemens Hausgeräte 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 Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to ES13770413.6T priority Critical patent/ES2635385T3/es
Priority to CN201380079612.8A priority patent/CN105593525B/zh
Priority to EP13770413.6A priority patent/EP3047150B1/fr
Publication of WO2014095102A1 publication Critical patent/WO2014095102A1/fr

Links

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 household dishwasher, with a canned pump, which is a rotor chamber
  • liquid-carrying housing comprising, at least in operating phases liquid-carrying housing, a rotatably mounted in the rotor chamber rotor unit, in a conveying region a conveying wheel for conveying the liquid, and having at least one subsection within the housing extending shaft through which the rotor unit and / or the conveyor wheel with each other coupled, in particular with the rotor unit and / or the feed wheel are rotatably connected, wherein the shaft is mounted within the rotor chamber on the conveyor wheel side facing the rotor unit with a first bearing and on the side facing away from the impeller 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 inside the rotor chamber with a first bearing on the conveyor wheel
  • Canned pump is forced by centrifugal forces, the air in the rotor chamber radially inward to the shaft. While air, which is located in an area on the side facing the impeller of the rotor, through openings such as by a
  • Storage gap of the shaft can escape to the outside, air is trapped in an area on the side facing away from the impeller of the rotor and can escape difficult again at a standstill of the canned pump via an outer rotor gap. This trapped air causes noise problems and may result in dry running of the bearing with vibration and / or increased wear.
  • Rotary unit and / or the shaft rotate in an associated rotor chamber, it may under some circumstances so unwanted noise and / or
  • the respective connecting channel in the rotor shell of the rotor unit is provided such that the respective connecting channel is provided outside the outer circumference of the shaft in the region between the radially inner edge and the radially outer edge of the shaft of the rotor unit seated on the shaft and one the second Bearing receiving portion of the rotor chamber with a first bearing receiving area of the rotor chamber connects.
  • Rotor unit can advantageously flow air, which is possibly in the region with the second bearing on the side facing away from the impeller of the rotor, on the conveyor wheel facing side of the rotor with the first bearing. This air may then pass through one or more openings, such as through a bearing gap between the shaft and the first, axially forward, the delivery wheel
  • the housing of the canned pump comprises a containment shell whose interior encloses the rotor chamber.
  • the can has a closed, preferably integrally molded, bottom or a
  • 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.
  • 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.
  • Rotor unit is located and in which the first bearing of the shaft is housed, reduce or largely equalize.
  • 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 inventive construction of the canned pump with the at least one fluid-passing connection channel in the jacket of the rotor unit is particularly advantageous in the case of a rotor chamber, which is prefilled with liquid, or with the
  • the conveying region or conveying path of the canned pump is in fluid-conducting connection and in the conveying operation of the canned pump, in which the delivery wheel is set in rotation, is filled with a subset of the liquid to be delivered. 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.
  • Fluid be designed for the rear in an advantageous manner that air, which - especially in the regular production operation, but especially in the starting operation of the canned pump - possibly in the rear, i. the chamber of the rotor chamber facing away from the impeller or collects, in the front, i.
  • the conveyor wheel facing space region of the rotor chamber can be performed. It is thus through the one or more fluid-through connection channels in the jacket of the rotor unit a venting or degassing possibility for the rear
  • Air received from the rotor chamber can then be discharged therefrom preferably through one or more openings, e.g. in the frontal, the conveyor wheel facing part of the boundary, in particular the front bearing plate and / or the front seal, the
  • Rotor chamber get into the open air.
  • such 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.
  • Rotor unit is particularly favorable in a canned pump with wet rotor system.
  • 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.
  • Shaft is provided in the front, the conveyor wheel facing region of the rotor chamber, a first bearing and in the rear, the conveyor wheel remote area of the rotor chamber, a second bearing.
  • 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.
  • the liquid which has entered the rotor chamber from the delivery area of the delivery wheel is thrown radially outwards in the direction of the outer boundary of the rotor chamber, whereby the air possibly located in the rotor chamber is displaced radially inwards towards the shaft and there in a central area the rotor chamber collects around the shaft in the rotor chamber in the form of an air bubble.
  • 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 bubble which is in a, preferably annular or
  • Toroidal, zone formed 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 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.
  • dry running of the bearing with associated vibrations and increased wear is largely avoided in the rear region of the rotor chamber.
  • undefined states in the respective bearing gap are avoided.
  • Fluid-compatible connecting channels also in other types of construction of canned pumps, in which the rear portion of the rotor chamber is at least partially pre-filled with a lubricating fluid, an air bubble in the rear of the
  • Rotor chamber is caught, are removed from this according to 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 fluid pump in the rotor chamber
  • Rotational motion is impressed, so that any existing air is concentrated in the central region of the rotor chamber.
  • the respective channel is arranged substantially parallel to the shaft of the pump.
  • it has a substantially rectilinear course section.
  • Conveyor wheel facing away from the rotor chamber near the shaft in the conveying operation of the canned pump possibly collects, properly to the opposite, the feed wheel facing side of the rotor chamber is derived.
  • This region of the rotor shell, in which runs the respective connecting channel, is preferably located in the radial direction between the radially inner edge of the seated on the shaft
  • Rotor mantle and outer magnet attached to the rotor mantle Rotor mantle and outer magnet attached to the rotor mantle.
  • 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.
  • Magnets which are arranged around the outer circumference of the support body can thus remain free of air passages which could possibly impair or disturb 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 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 . This is on the one hand a sufficient
  • 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 air can be guided to the first bearing and escape in a simple manner from the housing of the rotor chamber. If a plurality of connecting channels are arranged symmetrically in the circumferential direction of the rotor, ie offset in the circumferential direction with approximately the same circumferential angle to each other, imbalances of the rotor are largely avoided.
  • 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 inventive water-conducting household appliance has a
  • 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 stator unit fixedly arranged in a dry outer space, and a pipe section of non-magnetic material such as stainless steel or plastic arranged in the magnetic gap between rotor unit and stator unit.
  • an electric motor with a rotor unit held in liquid and a stator unit fixedly arranged in a dry outer space, and a pipe section of non-magnetic material such as stainless steel or plastic arranged in the magnetic gap between rotor unit and stator unit.
  • the liquid to be pumped be lubricated by this, so that if necessary, a movable shaft seal can be omitted.
  • Canned arrangement called.
  • it can be designed as a containment shell, in which the end of the pipe section facing away from the feed wheel is closed, i. is provided with a particular integrally molded end element.
  • the can is filled with a liquid, e.g. filled with a fluid or other liquid and seals it from the outside.
  • the split tube thus represents a separation in the radial direction over the axial length of the can.
  • 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.
  • Magnets are subject to fluctuations, and for some time very unfavorable
  • plastics used should be particularly inexpensive, resistant to hydrolysis and chemicals, as well as stable in temperature and at the same time high
  • the pipe section has a wall thickness of less than 0.75
  • 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. For very thin wall thicknesses, it may be advantageous if said
  • Pipe section made of a plastic with a melt flow index of more than 30 cm 3 per 10 minutes at 230 ° C is formed.
  • the production of the pump unit is particularly simple if the pipe section expediently part of a one-piece housing part of the
  • Pump housing is, 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 that no fluid trimmony
  • Venting of the rear area of the rotor chamber would be less possible over the radially outer rotor gap, the smaller the radial thickness of the rotor gap, i. 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.
  • Canned pump allows the radial expansion, i. To make 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 the rotor gap in the axial direction viewed from the front of the rotor chamber to the rear of the
  • the radial extent of the rotor gap is preferably smaller than the maximum cross-sectional width of the particles usually occurring in the fluid to be delivered or
  • 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.
  • Fig. 1 shows a cross section of an advantageous embodiment of a
  • Fig. 2 shows a cross section through a rotor and shaft of the one shown in Fig. 1
  • FIG. 3 shows the rotor with shaft of Fig. 2 in a perspective view, 4 as an exemplary water-conducting household appliance, a dishwasher in a schematic, partially cutaway side view with a circulating and / or suction pump unit,
  • Fig. 6 is a cross-sectional view of an alternative pumping unit
  • Fig. 7 is a section approximately along the line V-V in Figure 6.
  • corresponding parts are provided with the same reference numerals. Only those components are provided with reference numerals and explained, which are necessary for the understanding of the invention.
  • the household appliance shown schematically in Figure 4 here exemplifies a dishwasher 1 from.
  • 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 shown in Figure 4 in the closed position and, for example, about a lower horizontal axis 43a in the direction of the arrow 43d forward (on a front of the
  • Dishwasher standing user to) swung open Another, different from the pivoting opening movement is possible.
  • the items to be washed can be held in at least one washing basket; Here, for example, 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.
  • Rotary plane of such a rotatable spray arm is preferably in
  • 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.
  • Crockery baskets 441, 442 pull and push handles to simplify on and off
  • the rinsing liquor liquid S is exemplified by at least one heater 413 shown only schematically in Figure 4 to a manifold 414, in particular to a water separator, and from there to said sprayers 46, 47 directed, in particular pumped. Between the collecting pot, the rinsing liquor liquid
  • Spraying devices 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 shown in the figure 1 in a schematic cross-sectional view and with the
  • Reference numeral 2 marked. 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 a central one at the front end
  • Drive shaft 16 is mounted and protrudes from a housing 4.
  • the feed wheel 14 is driven by the drive shaft 16, which in its end region, i. at her
  • Feed wheel 14 opposite end is stored wet.
  • the drive shaft 16 is rotatable by an electric motor 17, i. can be driven, wherein the electric motor 17 comprises a arranged on the drive shaft 16 and held in liquid with this rotor unit 8, to which a gap region 32 is located radially outwardly also in the liquid space.
  • the term "held in liquid” means that the corresponding receiving space for the rotor unit 8 at least during operation of the
  • Pump unit can be flooded by liquid.
  • the rotor chamber 6 may be filled with rinsing liquor liquid - at least during operation of the pumping unit during which its delivery wheel is rotating - when e.g. via a bearing gap of a front bearing of the drive shaft with the conveying wheel 14 receiving counselbreich 40 of the canned pump 2 is in fluid-conducting connection.
  • another liquid which takes over the bearing lubrication and cooling is alternatively possible, e.g. if the rotor chamber is encapsulated by the delivery area of the canned pump.
  • Gap pipe section 4 ' as a one-piece or multi-piece component of the housing 4, which delimits the wet inner area (rotor chamber) 6, in which the drive shaft 16 is housed with the rotor unit 8, from a dry outer space 6 ' .
  • the dry inner area (rotor chamber) 6 in which the drive shaft 16 is housed with the rotor unit 8, from a dry outer space 6 ' .
  • Exterior 6 ' is a stator 12 of the electric motor 17 fixed, 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.
  • Cylinder jacket boundary 42 blank i. are without outer cover and thus are free there. Due to the lack of full encapsulation of the magnets 10 with plastic or other wrapping material at the radially outer end 42 is an additional
  • a plurality of magnets 10 are preferably mounted outside on a radially inwardly fixed to 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.
  • a magnetic body 10 is thus attached around the supporting body 39 on the outside, and thus the rotor shell 50 is formed.
  • Dishwasher improved fluid circulation in the rotor chamber and / or improved ventilation of the rotor chamber can be ensured by means of a designed according to the design principle of the invention rotor unit:
  • Fig. 1 shows in detail a canned pump 2 as an embodiment of a pump unit constructed according to the invention for a water-conducting household appliance, in the present case for a dishwasher, in a cross-sectional view.
  • a canned pump can be used, for example, as a circulating pump, such as e.g. 48 or drain pump such as 49 be trained and used.
  • 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 feed wheel 14 is located in the embodiment shown outside of the housing 4.
  • Canned pump 2 extends with a second, facing away from the conveyor wheel portion 18 within the housing 4 and projects with a further, ie first, the conveyor wheel 14 facing portion 20 of the housing 4 out.
  • the shaft 16 With the help of the shaft 16 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 direction of the feed wheel in the axial direction in the interior of the housing 4) within the housing 4 with a first, ie front bearing 22 and a second, ie rear bearing 24 rotatably supported.
  • 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.
  • Closing element is closed, a containment shell is provided. In particular, this is formed in one piece.
  • the housing 4 is fluid-permeable, i. There is a fluid-conducting
  • bypass openings that allow penetration of the liquid first in the front portion 26 of the housing so that it during the Operation of the canned pump 2 is in contact with the liquid to be delivered.
  • 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.
  • this air is forced in the rotor chamber 6 in the direction of the shaft 16, i. a central area of the rotor chamber.
  • air which is located in the front region 26, through the bearing gap 30 between the shaft 16 and the first, i. front bearing 22 out of the rotor chamber 6 out of the
  • Rotor shell 50 between the radially inner edge 41 and its radially outer edge 42 at least one fluid-through connection channel or passage 34 such that it the second bearing 24 receiving, rear portion 28 on the side facing away from the conveyor wheel 14 25 of the rotor unit 8 with the the first bearing 22 receiving, front region 26 on the side facing the impeller 23 of the rotor unit 8 connects continuously.
  • 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.
  • imbalances of the rotor are largely avoided.
  • it can also be any number of connecting channels 34 are present in the rotor. Through these channels 34 trapped air in the region of the shaft can escape from the rear portion 28 of the rotor chamber to the front, so that too this rear portion 28 is completely filled with liquid during operation of the canned pump 2, which then lubricates the second bearing 24.
  • 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. Es Therefore, 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 conveyor area 40, on the subsequent
  • 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.
  • FIGS. 2 and 3 A more detailed illustration of the rotor 8 as well as the shaft 16 and the channel 34 are shown in FIGS. 2 and 3.
  • the one or more connecting channels 34 each additionally have a section 36 on the side facing the conveyor wheel 14, which in FIG radial direction to the shaft 16 leads. This section 36 is formed by a radial groove.
  • the channels 34 preferably each have a square cross-section.
  • 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.
  • Canned pump allows the radial expansion, i. To make 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 included in the respective rinse cycle of a dishwasher, are prevented from being able to traverse the rotor gap in the axial direction from the front region of the rotor chamber to the rear region of the rotor chamber. Dirt of the rear bearing of the shaft and a concomitant wear and / or other adverse effects of the rear bearing of
  • Rotor gap is preferably chosen smaller than the maximum cross-sectional width of the particles or dirt particles usually occurring in the liquid to be delivered.
  • dirt particles which are removed during a rinse cycle of a dishwasher from the items to be cleaned by the one or more spray devices of the dishwasher and despite the
  • Filter system 41 1 get into the flushing liquid, which is supplied to the filter system 41 1 of the circulating pump unit 48 and / or pumping pump unit 49, from a passage through the rotor gap from the front, the first bearing of the shaft having area to the rear, the second bearing of the shaft having region of the rotor chamber are largely prevented.
  • 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.
  • the magnetic efficiency or efficiency of the canned pump over previous designs of canned pumps can be improved, which reduces the consumption of electrical energy of the canned pump according to the invention.
  • noise and / or storage problems, in particular the rear bearing because of the one or more connecting channels in the jacket of the rotor unit made possible
  • 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.
  • Dishwashers can be designed in particular as canned pumps with wet-runner systems.
  • a pump has, in particular, a housing forming a rotor chamber, which is preferably liquid-permeable to the conveying area of the conveying wheel, i.
  • a liquid-conducting connection between the rotor chamber and the conveying region of the feed wheel is according to a preferred embodiment.
  • Permeability can e.g. be realized by bypass openings and / or bearing gaps, through which a liquid such as water from the pump delivery path can get into the interior of the rotor chamber.
  • a liquid such as water from the pump delivery path can get into the interior of the rotor chamber.
  • a rotor In the rotor chamber is a rotor, which is part of a drive for the canned pump.
  • 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.
  • Canned pump is pressed by centrifugal forces occurring in the air in the rotor chamber to the shaft.
  • air which is located in a front region on the side facing the impeller of the rotor, through openings such as by a
  • Storage gap of the shaft can escape from the rotor chamber to the outside, remains trapped without countermeasures air in a rear area on the side facing away from the impeller of the rotor and can be difficult again at a standstill
  • one or more connecting channels in the jacket 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
  • housing part 4 which receives the drive shaft 16 with the rotor unit 8, in spite of over its course varying thicknesses advantageously be designed as a total of one piece injection molded part. It comprises the rotor unit 8 radially and preferably
  • a housing bottom 31 can be integrally formed on the pipe section 4 ' at its axial end facing away from the impeller or conveying wheel 14 and thus outside the pipe section 4 ' , which acts as a rotor chamber for accommodating the rotor unit 8 , so that an end-closed 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.
  • the front end wall preferably forms one at the same time
  • Drive shaft 16 is provided with the rotor unit 8, a one-piece housing part 4, which from an axial, preferably cylindrical, preferably substantially circular cylindrical pipe section 4 ' , which limits a rotor chamber 6 for housing the rotor unit 8 in the radial direction over its axial longitudinal extent, 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 Spülflottentellkeit through a central
  • Intake manifold 260 from the outside in the axial direction (relative to the elongated Drive shaft) into the hydraulic chamber 27 to suck in and with a radial
  • crevice 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 modified construction of a canned pump illustrates that in the figure 6 shown in section embodiment.
  • Rotor unit 8 indicated.
  • this is preferably coupled via an additional sealing point with a separate, front end part or end piece 320 which is adjacent to 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 front separate end portion 320 of a less flowable and thus cheaper plastic than the split tube section 4 ' are produced. 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.
  • the gap tube section 4 ' itself
  • 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.
  • other reinforcing in particular the tensile strength
  • Impact resistance, and / or compressive strength-increasing additives are mixed into the easily flowable plastic material of the can 4 ' . Additionally or independently thereof, 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. If, for example, only the can 4 'is designed like a sleeve as a single part, so expediently only this by a high-strength
  • Plastic for example, PPS
  • PPS polystyrene resin
  • the rotor unit is free of envelopes at its radially outer edge, ie has bare magnetisable material, in particular ferrite material there.
  • 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 as gapless as possible, i. directly contacting on the outer wall of the pipe section or

Landscapes

  • 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)

Abstract

L'invention concerne un appareil ménager à circulation d'eau, en particulier un lave-vaisselle ménager (1), comprenant une pompe à rotor noyé (2) dotée d'un boîtier (4), dans lequel du liquide circule au moins dans certaines phases de fonctionnement, et d'une chambre de rotor (6). La pompe comprend en outre une unité de rotor (8) montée rotative dans la chambre de rotor (6), une roue d'alimentation (14) située dans une zone d'alimentation (40) et destinée à alimenter le liquide, et un arbre (16) dont au moins un segment (18) s'étend à l'intérieur du boîtier (4). L'unité de rotor (8) et/ou la roue d'alimentation (14) sont couplées l'une à l'autre par l'arbre (16), en particulier l'unité de rotor (8) et/ou la roue d'alimentation (14) sont solidaires en rotation de l'arbre (16). L'arbre (16) est monté à l'intérieur de la chambre de rotor (6) sur un premier palier (22) du côté (23) de l'unité de rotor (8) faisant face à la roue d'alimentation (14) et sur un second palier (24) du côté (25) de l'unité de rotor (8) à l'opposé de la roue d'alimentation (14). Au moins un conduit de liaison (34) pour le passage de fluide traverse l'enveloppe de rotor (50) de l'unité de rotor (8) entre son bord radialement intérieur (41) et son bord radialement extérieur (42) de telle façon qu'il relie une zone de réception (28) pour le second palier (24) du côté (25) de l'unité de rotor (8) à l'opposé de la roue d'alimentation (14) à une zone de réception (26) pour le premier palier (22) du côté (23) de l'unité de rotor (8) faisant face à la roue d'alimentation.
PCT/EP2013/069200 2012-12-21 2013-09-17 Appareil ménager à circulation d'eau comprenant une pompe à rotor noyé WO2014095102A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES13770413.6T ES2635385T3 (es) 2012-12-21 2013-09-17 Aparato doméstico con circulación de agua con una bomba de motor provisto de diafragma
CN201380079612.8A CN105593525B (zh) 2013-09-17 2013-09-17 具有屏蔽泵的导水的家用设备
EP13770413.6A EP3047150B1 (fr) 2012-12-21 2013-09-17 Appareil ménager à circulation d'eau comprenant une pompe à rotor noyé

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102012224262 2012-12-21
DE102012224263.5 2012-12-21
DE102012224262.7 2012-12-21
DE102012224263 2012-12-21

Publications (1)

Publication Number Publication Date
WO2014095102A1 true WO2014095102A1 (fr) 2014-06-26

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Application Number Title Priority Date Filing Date
PCT/EP2013/069200 WO2014095102A1 (fr) 2012-12-21 2013-09-17 Appareil ménager à circulation d'eau comprenant une pompe à rotor noyé

Country Status (3)

Country Link
EP (1) EP3047150B1 (fr)
PL (1) PL3047150T3 (fr)
WO (1) WO2014095102A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015007616A1 (fr) * 2013-07-19 2015-01-22 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager à circulation d'eau pourvu d'une unité de pompe présentant une gaine
DE102017203987A1 (de) 2017-03-10 2018-09-13 BSH Hausgeräte GmbH Pumpe für ein wasserführendes Haushaltsgerät

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022202277A1 (de) 2022-03-07 2023-09-07 BSH Hausgeräte GmbH Pumpe, Pumpensystem und wasserführendes Haushaltsgerät

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9200510U1 (fr) * 1992-01-17 1992-11-12 Siemens Ag, 8000 Muenchen, De
WO2007098976A2 (fr) * 2006-02-24 2007-09-07 BSH Bosch und Siemens Hausgeräte GmbH Appareil électroménager à arbre amélioré
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9200510U1 (fr) * 1992-01-17 1992-11-12 Siemens Ag, 8000 Muenchen, De
WO2007098976A2 (fr) * 2006-02-24 2007-09-07 BSH Bosch und Siemens Hausgeräte GmbH Appareil électroménager à arbre amélioré
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015007616A1 (fr) * 2013-07-19 2015-01-22 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager à circulation d'eau pourvu d'une unité de pompe présentant une gaine
DE102017203987A1 (de) 2017-03-10 2018-09-13 BSH Hausgeräte GmbH Pumpe für ein wasserführendes Haushaltsgerät
DE102017203987B4 (de) 2017-03-10 2019-05-29 BSH Hausgeräte GmbH Pumpe für ein wasserführendes Haushaltsgerät

Also Published As

Publication number Publication date
PL3047150T3 (pl) 2017-11-30
EP3047150B1 (fr) 2017-06-07
EP3047150A1 (fr) 2016-07-27

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